* kill req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Currently the request structure has an errors field that is used in
various different ways. The oldest drivers use it as an error count,
blk-mq and the generic timeout code assume that it holds a Linux
errno for block completions, and various drivers use it for internal
status values, often overwriting them with Linux errnos later,
that is unless they are processing passthrough requests in which
case they'll leave their errors in it.
This series kills the ->errors field and replaced it with new fields
in the drivers (or an odd hack in a union in struct request for
two bitrotting old drivers).
Note that this series expects that the patch to remove the mg_disk
driver has been applied already on top of the block for-next tree.
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 01/25] remove the mg_disk driver
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
This drivers was added in 2008, but as far as a I can tell we never had a
single platform that actually registered resources for the platform driver.
It's also been unmaintained for a long time and apparently has a ATA mode
that can be driven using the IDE/libata subsystem.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
Documentation/blockdev/mflash.txt | 84 ---
drivers/block/Kconfig | 17 -
drivers/block/Makefile | 1 -
drivers/block/mg_disk.c | 1110 -------------------------------------
include/linux/mg_disk.h | 45 --
5 files changed, 1257 deletions(-)
delete mode 100644 Documentation/blockdev/mflash.txt
delete mode 100644 drivers/block/mg_disk.c
delete mode 100644 include/linux/mg_disk.h
diff --git a/Documentation/blockdev/mflash.txt b/Documentation/blockdev/mflash.txt
deleted file mode 100644
index f7e050551487..000000000000
--- a/Documentation/blockdev/mflash.txt
+++ /dev/null
@@ -1,84 +0,0 @@
-This document describes m[g]flash support in linux.
-
-Contents
- 1. Overview
- 2. Reserved area configuration
- 3. Example of mflash platform driver registration
-
-1. Overview
-
-Mflash and gflash are embedded flash drive. The only difference is mflash is
-MCP(Multi Chip Package) device. These two device operate exactly same way.
-So the rest mflash repersents mflash and gflash altogether.
-
-Internally, mflash has nand flash and other hardware logics and supports
-2 different operation (ATA, IO) modes. ATA mode doesn't need any new
-driver and currently works well under standard IDE subsystem. Actually it's
-one chip SSD. IO mode is ATA-like custom mode for the host that doesn't have
-IDE interface.
-
-Following are brief descriptions about IO mode.
-A. IO mode based on ATA protocol and uses some custom command. (read confirm,
-write confirm)
-B. IO mode uses SRAM bus interface.
-C. IO mode supports 4kB boot area, so host can boot from mflash.
-
-2. Reserved area configuration
-If host boot from mflash, usually needs raw area for boot loader image. All of
-the mflash's block device operation will be taken this value as start offset.
-Note that boot loader's size of reserved area and kernel configuration value
-must be same.
-
-3. Example of mflash platform driver registration
-Working mflash is very straight forward. Adding platform device stuff to board
-configuration file is all. Here is some pseudo example.
-
-static struct mg_drv_data mflash_drv_data = {
- /* If you want to polling driver set to 1 */
- .use_polling = 0,
- /* device attribution */
- .dev_attr = MG_BOOT_DEV
-};
-
-static struct resource mg_mflash_rsc[] = {
- /* Base address of mflash */
- [0] = {
- .start = 0x08000000,
- .end = 0x08000000 + SZ_64K - 1,
- .flags = IORESOURCE_MEM
- },
- /* mflash interrupt pin */
- [1] = {
- .start = IRQ_GPIO(84),
- .end = IRQ_GPIO(84),
- .flags = IORESOURCE_IRQ
- },
- /* mflash reset pin */
- [2] = {
- .start = 43,
- .end = 43,
- .name = MG_RST_PIN,
- .flags = IORESOURCE_IO
- },
- /* mflash reset-out pin
- * If you use mflash as storage device (i.e. other than MG_BOOT_DEV),
- * should assign this */
- [3] = {
- .start = 51,
- .end = 51,
- .name = MG_RSTOUT_PIN,
- .flags = IORESOURCE_IO
- }
-};
-
-static struct platform_device mflash_dev = {
- .name = MG_DEV_NAME,
- .id = -1,
- .dev = {
- .platform_data = &mflash_drv_data,
- },
- .num_resources = ARRAY_SIZE(mg_mflash_rsc),
- .resource = mg_mflash_rsc
-};
-
-platform_device_register(&mflash_dev);
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index a1c2e816128f..ebe8c1a6195e 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -434,23 +434,6 @@ config ATA_OVER_ETH
This driver provides Support for ATA over Ethernet block
devices like the Coraid EtherDrive (R) Storage Blade.
-config MG_DISK
- tristate "mGine mflash, gflash support"
- depends on ARM && GPIOLIB
- help
- mGine mFlash(gFlash) block device driver
-
-config MG_DISK_RES
- int "Size of reserved area before MBR"
- depends on MG_DISK
- default 0
- help
- Define size of reserved area that usually used for boot. Unit is KB.
- All of the block device operation will be taken this value as start
- offset
- Examples:
- 1024 => 1 MB
-
config SUNVDC
tristate "Sun Virtual Disk Client support"
depends on SUN_LDOMS
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index b12c772bbeb3..5ceead8b52d7 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -19,7 +19,6 @@ obj-$(CONFIG_BLK_CPQ_CISS_DA) += cciss.o
obj-$(CONFIG_BLK_DEV_DAC960) += DAC960.o
obj-$(CONFIG_XILINX_SYSACE) += xsysace.o
obj-$(CONFIG_CDROM_PKTCDVD) += pktcdvd.o
-obj-$(CONFIG_MG_DISK) += mg_disk.o
obj-$(CONFIG_SUNVDC) += sunvdc.o
obj-$(CONFIG_BLK_DEV_SKD) += skd.o
obj-$(CONFIG_BLK_DEV_OSD) += osdblk.o
diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
deleted file mode 100644
index e88e7b06c616..000000000000
--- a/drivers/block/mg_disk.c
+++ /dev/null
@@ -1,1110 +0,0 @@
-/*
- * drivers/block/mg_disk.c
- *
- * Support for the mGine m[g]flash IO mode.
- * Based on legacy hd.c
- *
- * (c) 2008 mGine Co.,LTD
- * (c) 2008 unsik Kim <donari75@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/blkdev.h>
-#include <linux/hdreg.h>
-#include <linux/ata.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/mg_disk.h>
-#include <linux/slab.h>
-
-#define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)
-
-/* name for block device */
-#define MG_DISK_NAME "mgd"
-
-#define MG_DISK_MAJ 0
-#define MG_DISK_MAX_PART 16
-#define MG_SECTOR_SIZE 512
-#define MG_MAX_SECTS 256
-
-/* Register offsets */
-#define MG_BUFF_OFFSET 0x8000
-#define MG_REG_OFFSET 0xC000
-#define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */
-#define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */
-#define MG_REG_SECT_CNT (MG_REG_OFFSET + 4)
-#define MG_REG_SECT_NUM (MG_REG_OFFSET + 6)
-#define MG_REG_CYL_LOW (MG_REG_OFFSET + 8)
-#define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA)
-#define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC)
-#define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */
-#define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */
-#define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10)
-#define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12)
-
-/* handy status */
-#define MG_STAT_READY (ATA_DRDY | ATA_DSC)
-#define MG_READY_OK(s) (((s) & (MG_STAT_READY | (ATA_BUSY | ATA_DF | \
- ATA_ERR))) == MG_STAT_READY)
-
-/* error code for others */
-#define MG_ERR_NONE 0
-#define MG_ERR_TIMEOUT 0x100
-#define MG_ERR_INIT_STAT 0x101
-#define MG_ERR_TRANSLATION 0x102
-#define MG_ERR_CTRL_RST 0x103
-#define MG_ERR_INV_STAT 0x104
-#define MG_ERR_RSTOUT 0x105
-
-#define MG_MAX_ERRORS 6 /* Max read/write errors */
-
-/* command */
-#define MG_CMD_RD 0x20
-#define MG_CMD_WR 0x30
-#define MG_CMD_SLEEP 0x99
-#define MG_CMD_WAKEUP 0xC3
-#define MG_CMD_ID 0xEC
-#define MG_CMD_WR_CONF 0x3C
-#define MG_CMD_RD_CONF 0x40
-
-/* operation mode */
-#define MG_OP_CASCADE (1 << 0)
-#define MG_OP_CASCADE_SYNC_RD (1 << 1)
-#define MG_OP_CASCADE_SYNC_WR (1 << 2)
-#define MG_OP_INTERLEAVE (1 << 3)
-
-/* synchronous */
-#define MG_BURST_LAT_4 (3 << 4)
-#define MG_BURST_LAT_5 (4 << 4)
-#define MG_BURST_LAT_6 (5 << 4)
-#define MG_BURST_LAT_7 (6 << 4)
-#define MG_BURST_LAT_8 (7 << 4)
-#define MG_BURST_LEN_4 (1 << 1)
-#define MG_BURST_LEN_8 (2 << 1)
-#define MG_BURST_LEN_16 (3 << 1)
-#define MG_BURST_LEN_32 (4 << 1)
-#define MG_BURST_LEN_CONT (0 << 1)
-
-/* timeout value (unit: ms) */
-#define MG_TMAX_CONF_TO_CMD 1
-#define MG_TMAX_WAIT_RD_DRQ 10
-#define MG_TMAX_WAIT_WR_DRQ 500
-#define MG_TMAX_RST_TO_BUSY 10
-#define MG_TMAX_HDRST_TO_RDY 500
-#define MG_TMAX_SWRST_TO_RDY 500
-#define MG_TMAX_RSTOUT 3000
-
-#define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)
-
-/* main structure for mflash driver */
-struct mg_host {
- struct device *dev;
-
- struct request_queue *breq;
- struct request *req;
- spinlock_t lock;
- struct gendisk *gd;
-
- struct timer_list timer;
- void (*mg_do_intr) (struct mg_host *);
-
- u16 id[ATA_ID_WORDS];
-
- u16 cyls;
- u16 heads;
- u16 sectors;
- u32 n_sectors;
- u32 nres_sectors;
-
- void __iomem *dev_base;
- unsigned int irq;
- unsigned int rst;
- unsigned int rstout;
-
- u32 major;
- u32 error;
-};
-
-/*
- * Debugging macro and defines
- */
-#undef DO_MG_DEBUG
-#ifdef DO_MG_DEBUG
-# define MG_DBG(fmt, args...) \
- printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args)
-#else /* CONFIG_MG_DEBUG */
-# define MG_DBG(fmt, args...) do { } while (0)
-#endif /* CONFIG_MG_DEBUG */
-
-static void mg_request(struct request_queue *);
-
-static bool mg_end_request(struct mg_host *host, int err, unsigned int nr_bytes)
-{
- if (__blk_end_request(host->req, err, nr_bytes))
- return true;
-
- host->req = NULL;
- return false;
-}
-
-static bool mg_end_request_cur(struct mg_host *host, int err)
-{
- return mg_end_request(host, err, blk_rq_cur_bytes(host->req));
-}
-
-static void mg_dump_status(const char *msg, unsigned int stat,
- struct mg_host *host)
-{
- char *name = MG_DISK_NAME;
-
- if (host->req)
- name = host->req->rq_disk->disk_name;
-
- printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff);
- if (stat & ATA_BUSY)
- printk("Busy ");
- if (stat & ATA_DRDY)
- printk("DriveReady ");
- if (stat & ATA_DF)
- printk("WriteFault ");
- if (stat & ATA_DSC)
- printk("SeekComplete ");
- if (stat & ATA_DRQ)
- printk("DataRequest ");
- if (stat & ATA_CORR)
- printk("CorrectedError ");
- if (stat & ATA_ERR)
- printk("Error ");
- printk("}\n");
- if ((stat & ATA_ERR) == 0) {
- host->error = 0;
- } else {
- host->error = inb((unsigned long)host->dev_base + MG_REG_ERROR);
- printk(KERN_ERR "%s: %s: error=0x%02x { ", name, msg,
- host->error & 0xff);
- if (host->error & ATA_BBK)
- printk("BadSector ");
- if (host->error & ATA_UNC)
- printk("UncorrectableError ");
- if (host->error & ATA_IDNF)
- printk("SectorIdNotFound ");
- if (host->error & ATA_ABORTED)
- printk("DriveStatusError ");
- if (host->error & ATA_AMNF)
- printk("AddrMarkNotFound ");
- printk("}");
- if (host->error & (ATA_BBK | ATA_UNC | ATA_IDNF | ATA_AMNF)) {
- if (host->req)
- printk(", sector=%u",
- (unsigned int)blk_rq_pos(host->req));
- }
- printk("\n");
- }
-}
-
-static unsigned int mg_wait(struct mg_host *host, u32 expect, u32 msec)
-{
- u8 status;
- unsigned long expire, cur_jiffies;
- struct mg_drv_data *prv_data = host->dev->platform_data;
-
- host->error = MG_ERR_NONE;
- expire = jiffies + msecs_to_jiffies(msec);
-
- /* These 2 times dummy status read prevents reading invalid
- * status. A very little time (3 times of mflash operating clk)
- * is required for busy bit is set. Use dummy read instead of
- * busy wait, because mflash's PLL is machine dependent.
- */
- if (prv_data->use_polling) {
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- }
-
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
-
- do {
- cur_jiffies = jiffies;
- if (status & ATA_BUSY) {
- if (expect == ATA_BUSY)
- break;
- } else {
- /* Check the error condition! */
- if (status & ATA_ERR) {
- mg_dump_status("mg_wait", status, host);
- break;
- }
-
- if (expect == MG_STAT_READY)
- if (MG_READY_OK(status))
- break;
-
- if (expect == ATA_DRQ)
- if (status & ATA_DRQ)
- break;
- }
- if (!msec) {
- mg_dump_status("not ready", status, host);
- return MG_ERR_INV_STAT;
- }
-
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- } while (time_before(cur_jiffies, expire));
-
- if (time_after_eq(cur_jiffies, expire) && msec)
- host->error = MG_ERR_TIMEOUT;
-
- return host->error;
-}
-
-static unsigned int mg_wait_rstout(u32 rstout, u32 msec)
-{
- unsigned long expire;
-
- expire = jiffies + msecs_to_jiffies(msec);
- while (time_before(jiffies, expire)) {
- if (gpio_get_value(rstout) == 1)
- return MG_ERR_NONE;
- msleep(10);
- }
-
- return MG_ERR_RSTOUT;
-}
-
-static void mg_unexpected_intr(struct mg_host *host)
-{
- u32 status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
-
- mg_dump_status("mg_unexpected_intr", status, host);
-}
-
-static irqreturn_t mg_irq(int irq, void *dev_id)
-{
- struct mg_host *host = dev_id;
- void (*handler)(struct mg_host *) = host->mg_do_intr;
-
- spin_lock(&host->lock);
-
- host->mg_do_intr = NULL;
- del_timer(&host->timer);
- if (!handler)
- handler = mg_unexpected_intr;
- handler(host);
-
- spin_unlock(&host->lock);
-
- return IRQ_HANDLED;
-}
-
-/* local copy of ata_id_string() */
-static void mg_id_string(const u16 *id, unsigned char *s,
- unsigned int ofs, unsigned int len)
-{
- unsigned int c;
-
- BUG_ON(len & 1);
-
- while (len > 0) {
- c = id[ofs] >> 8;
- *s = c;
- s++;
-
- c = id[ofs] & 0xff;
- *s = c;
- s++;
-
- ofs++;
- len -= 2;
- }
-}
-
-/* local copy of ata_id_c_string() */
-static void mg_id_c_string(const u16 *id, unsigned char *s,
- unsigned int ofs, unsigned int len)
-{
- unsigned char *p;
-
- mg_id_string(id, s, ofs, len - 1);
-
- p = s + strnlen(s, len - 1);
- while (p > s && p[-1] == ' ')
- p--;
- *p = '\0';
-}
-
-static int mg_get_disk_id(struct mg_host *host)
-{
- u32 i;
- s32 err;
- const u16 *id = host->id;
- struct mg_drv_data *prv_data = host->dev->platform_data;
- char fwrev[ATA_ID_FW_REV_LEN + 1];
- char model[ATA_ID_PROD_LEN + 1];
- char serial[ATA_ID_SERNO_LEN + 1];
-
- if (!prv_data->use_polling)
- outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND);
- err = mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_RD_DRQ);
- if (err)
- return err;
-
- for (i = 0; i < (MG_SECTOR_SIZE >> 1); i++)
- host->id[i] = le16_to_cpu(inw((unsigned long)host->dev_base +
- MG_BUFF_OFFSET + i * 2));
-
- outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
- err = mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD);
- if (err)
- return err;
-
- if ((id[ATA_ID_FIELD_VALID] & 1) == 0)
- return MG_ERR_TRANSLATION;
-
- host->n_sectors = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
- host->cyls = id[ATA_ID_CYLS];
- host->heads = id[ATA_ID_HEADS];
- host->sectors = id[ATA_ID_SECTORS];
-
- if (MG_RES_SEC && host->heads && host->sectors) {
- /* modify cyls, n_sectors */
- host->cyls = (host->n_sectors - MG_RES_SEC) /
- host->heads / host->sectors;
- host->nres_sectors = host->n_sectors - host->cyls *
- host->heads * host->sectors;
- host->n_sectors -= host->nres_sectors;
- }
-
- mg_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev));
- mg_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
- mg_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
- printk(KERN_INFO "mg_disk: model: %s\n", model);
- printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev);
- printk(KERN_INFO "mg_disk: serial: %s\n", serial);
- printk(KERN_INFO "mg_disk: %d + reserved %d sectors\n",
- host->n_sectors, host->nres_sectors);
-
- if (!prv_data->use_polling)
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- return err;
-}
-
-
-static int mg_disk_init(struct mg_host *host)
-{
- struct mg_drv_data *prv_data = host->dev->platform_data;
- s32 err;
- u8 init_status;
-
- /* hdd rst low */
- gpio_set_value(host->rst, 0);
- err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY);
- if (err)
- return err;
-
- /* hdd rst high */
- gpio_set_value(host->rst, 1);
- err = mg_wait(host, MG_STAT_READY, MG_TMAX_HDRST_TO_RDY);
- if (err)
- return err;
-
- /* soft reset on */
- outb(ATA_SRST | (prv_data->use_polling ? ATA_NIEN : 0),
- (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY);
- if (err)
- return err;
-
- /* soft reset off */
- outb(prv_data->use_polling ? ATA_NIEN : 0,
- (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY);
- if (err)
- return err;
-
- init_status = inb((unsigned long)host->dev_base + MG_REG_STATUS) & 0xf;
-
- if (init_status == 0xf)
- return MG_ERR_INIT_STAT;
-
- return err;
-}
-
-static void mg_bad_rw_intr(struct mg_host *host)
-{
- if (host->req)
- if (++host->req->errors >= MG_MAX_ERRORS ||
- host->error == MG_ERR_TIMEOUT)
- mg_end_request_cur(host, -EIO);
-}
-
-static unsigned int mg_out(struct mg_host *host,
- unsigned int sect_num,
- unsigned int sect_cnt,
- unsigned int cmd,
- void (*intr_addr)(struct mg_host *))
-{
- struct mg_drv_data *prv_data = host->dev->platform_data;
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return host->error;
-
- if (!prv_data->use_polling) {
- host->mg_do_intr = intr_addr;
- mod_timer(&host->timer, jiffies + 3 * HZ);
- }
- if (MG_RES_SEC)
- sect_num += MG_RES_SEC;
- outb((u8)sect_cnt, (unsigned long)host->dev_base + MG_REG_SECT_CNT);
- outb((u8)sect_num, (unsigned long)host->dev_base + MG_REG_SECT_NUM);
- outb((u8)(sect_num >> 8), (unsigned long)host->dev_base +
- MG_REG_CYL_LOW);
- outb((u8)(sect_num >> 16), (unsigned long)host->dev_base +
- MG_REG_CYL_HIGH);
- outb((u8)((sect_num >> 24) | ATA_LBA | ATA_DEVICE_OBS),
- (unsigned long)host->dev_base + MG_REG_DRV_HEAD);
- outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND);
- return MG_ERR_NONE;
-}
-
-static void mg_read_one(struct mg_host *host, struct request *req)
-{
- u16 *buff = (u16 *)bio_data(req->bio);
- u32 i;
-
- for (i = 0; i < MG_SECTOR_SIZE >> 1; i++)
- *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET +
- (i << 1));
-}
-
-static void mg_read(struct request *req)
-{
- struct mg_host *host = req->rq_disk->private_data;
-
- if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req),
- MG_CMD_RD, NULL) != MG_ERR_NONE)
- mg_bad_rw_intr(host);
-
- MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
- blk_rq_sectors(req), blk_rq_pos(req), bio_data(req->bio));
-
- do {
- if (mg_wait(host, ATA_DRQ,
- MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
-
- mg_read_one(host, req);
-
- outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base +
- MG_REG_COMMAND);
- } while (mg_end_request(host, 0, MG_SECTOR_SIZE));
-}
-
-static void mg_write_one(struct mg_host *host, struct request *req)
-{
- u16 *buff = (u16 *)bio_data(req->bio);
- u32 i;
-
- for (i = 0; i < MG_SECTOR_SIZE >> 1; i++)
- outw(*buff++, (unsigned long)host->dev_base + MG_BUFF_OFFSET +
- (i << 1));
-}
-
-static void mg_write(struct request *req)
-{
- struct mg_host *host = req->rq_disk->private_data;
- unsigned int rem = blk_rq_sectors(req);
-
- if (mg_out(host, blk_rq_pos(req), rem,
- MG_CMD_WR, NULL) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
-
- MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
- rem, blk_rq_pos(req), bio_data(req->bio));
-
- if (mg_wait(host, ATA_DRQ,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
-
- do {
- mg_write_one(host, req);
-
- outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
- MG_REG_COMMAND);
-
- rem--;
- if (rem > 1 && mg_wait(host, ATA_DRQ,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- } else if (mg_wait(host, MG_STAT_READY,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
- } while (mg_end_request(host, 0, MG_SECTOR_SIZE));
-}
-
-static void mg_read_intr(struct mg_host *host)
-{
- struct request *req = host->req;
- u32 i;
-
- /* check status */
- do {
- i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- if (i & ATA_BUSY)
- break;
- if (!MG_READY_OK(i))
- break;
- if (i & ATA_DRQ)
- goto ok_to_read;
- } while (0);
- mg_dump_status("mg_read_intr", i, host);
- mg_bad_rw_intr(host);
- mg_request(host->breq);
- return;
-
-ok_to_read:
- mg_read_one(host, req);
-
- MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
- blk_rq_pos(req), blk_rq_sectors(req) - 1, bio_data(req->bio));
-
- /* send read confirm */
- outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
-
- if (mg_end_request(host, 0, MG_SECTOR_SIZE)) {
- /* set handler if read remains */
- host->mg_do_intr = mg_read_intr;
- mod_timer(&host->timer, jiffies + 3 * HZ);
- } else /* goto next request */
- mg_request(host->breq);
-}
-
-static void mg_write_intr(struct mg_host *host)
-{
- struct request *req = host->req;
- u32 i;
- bool rem;
-
- /* check status */
- do {
- i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- if (i & ATA_BUSY)
- break;
- if (!MG_READY_OK(i))
- break;
- if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ))
- goto ok_to_write;
- } while (0);
- mg_dump_status("mg_write_intr", i, host);
- mg_bad_rw_intr(host);
- mg_request(host->breq);
- return;
-
-ok_to_write:
- if ((rem = mg_end_request(host, 0, MG_SECTOR_SIZE))) {
- /* write 1 sector and set handler if remains */
- mg_write_one(host, req);
- MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
- blk_rq_pos(req), blk_rq_sectors(req), bio_data(req->bio));
- host->mg_do_intr = mg_write_intr;
- mod_timer(&host->timer, jiffies + 3 * HZ);
- }
-
- /* send write confirm */
- outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
-
- if (!rem)
- mg_request(host->breq);
-}
-
-static void mg_times_out(unsigned long data)
-{
- struct mg_host *host = (struct mg_host *)data;
- char *name;
-
- spin_lock_irq(&host->lock);
-
- if (!host->req)
- goto out_unlock;
-
- host->mg_do_intr = NULL;
-
- name = host->req->rq_disk->disk_name;
- printk(KERN_DEBUG "%s: timeout\n", name);
-
- host->error = MG_ERR_TIMEOUT;
- mg_bad_rw_intr(host);
-
-out_unlock:
- mg_request(host->breq);
- spin_unlock_irq(&host->lock);
-}
-
-static void mg_request_poll(struct request_queue *q)
-{
- struct mg_host *host = q->queuedata;
-
- while (1) {
- if (!host->req) {
- host->req = blk_fetch_request(q);
- if (!host->req)
- break;
- }
-
- switch (req_op(host->req)) {
- case REQ_OP_READ:
- mg_read(host->req);
- break;
- case REQ_OP_WRITE:
- mg_write(host->req);
- break;
- default:
- mg_end_request_cur(host, -EIO);
- break;
- }
- }
-}
-
-static unsigned int mg_issue_req(struct request *req,
- struct mg_host *host,
- unsigned int sect_num,
- unsigned int sect_cnt)
-{
- switch (req_op(host->req)) {
- case REQ_OP_READ:
- if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr)
- != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return host->error;
- }
- break;
- case REQ_OP_WRITE:
- /* TODO : handler */
- outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr)
- != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return host->error;
- }
- del_timer(&host->timer);
- mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ);
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- if (host->error) {
- mg_bad_rw_intr(host);
- return host->error;
- }
- mg_write_one(host, req);
- mod_timer(&host->timer, jiffies + 3 * HZ);
- outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
- MG_REG_COMMAND);
- break;
- default:
- mg_end_request_cur(host, -EIO);
- break;
- }
- return MG_ERR_NONE;
-}
-
-/* This function also called from IRQ context */
-static void mg_request(struct request_queue *q)
-{
- struct mg_host *host = q->queuedata;
- struct request *req;
- u32 sect_num, sect_cnt;
-
- while (1) {
- if (!host->req) {
- host->req = blk_fetch_request(q);
- if (!host->req)
- break;
- }
- req = host->req;
-
- /* check unwanted request call */
- if (host->mg_do_intr)
- return;
-
- del_timer(&host->timer);
-
- sect_num = blk_rq_pos(req);
- /* deal whole segments */
- sect_cnt = blk_rq_sectors(req);
-
- /* sanity check */
- if (sect_num >= get_capacity(req->rq_disk) ||
- ((sect_num + sect_cnt) >
- get_capacity(req->rq_disk))) {
- printk(KERN_WARNING
- "%s: bad access: sector=%d, count=%d\n",
- req->rq_disk->disk_name,
- sect_num, sect_cnt);
- mg_end_request_cur(host, -EIO);
- continue;
- }
-
- if (!mg_issue_req(req, host, sect_num, sect_cnt))
- return;
- }
-}
-
-static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo)
-{
- struct mg_host *host = bdev->bd_disk->private_data;
-
- geo->cylinders = (unsigned short)host->cyls;
- geo->heads = (unsigned char)host->heads;
- geo->sectors = (unsigned char)host->sectors;
- return 0;
-}
-
-static const struct block_device_operations mg_disk_ops = {
- .getgeo = mg_getgeo
-};
-
-#ifdef CONFIG_PM_SLEEP
-static int mg_suspend(struct device *dev)
-{
- struct mg_drv_data *prv_data = dev->platform_data;
- struct mg_host *host = prv_data->host;
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return -EIO;
-
- if (!prv_data->use_polling)
- outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND);
- /* wait until mflash deep sleep */
- msleep(1);
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) {
- if (!prv_data->use_polling)
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- return -EIO;
- }
-
- return 0;
-}
-
-static int mg_resume(struct device *dev)
-{
- struct mg_drv_data *prv_data = dev->platform_data;
- struct mg_host *host = prv_data->host;
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return -EIO;
-
- outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND);
- /* wait until mflash wakeup */
- msleep(1);
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return -EIO;
-
- if (!prv_data->use_polling)
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(mg_pm, mg_suspend, mg_resume);
-
-static int mg_probe(struct platform_device *plat_dev)
-{
- struct mg_host *host;
- struct resource *rsc;
- struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
- int err = 0;
-
- if (!prv_data) {
- printk(KERN_ERR "%s:%d fail (no driver_data)\n",
- __func__, __LINE__);
- err = -EINVAL;
- goto probe_err;
- }
-
- /* alloc mg_host */
- host = kzalloc(sizeof(struct mg_host), GFP_KERNEL);
- if (!host) {
- printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n",
- __func__, __LINE__);
- err = -ENOMEM;
- goto probe_err;
- }
- host->major = MG_DISK_MAJ;
-
- /* link each other */
- prv_data->host = host;
- host->dev = &plat_dev->dev;
-
- /* io remap */
- rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
- if (!rsc) {
- printk(KERN_ERR "%s:%d platform_get_resource fail\n",
- __func__, __LINE__);
- err = -EINVAL;
- goto probe_err_2;
- }
- host->dev_base = ioremap(rsc->start, resource_size(rsc));
- if (!host->dev_base) {
- printk(KERN_ERR "%s:%d ioremap fail\n",
- __func__, __LINE__);
- err = -EIO;
- goto probe_err_2;
- }
- MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base);
-
- /* get reset pin */
- rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO,
- MG_RST_PIN);
- if (!rsc) {
- printk(KERN_ERR "%s:%d get reset pin fail\n",
- __func__, __LINE__);
- err = -EIO;
- goto probe_err_3;
- }
- host->rst = rsc->start;
-
- /* init rst pin */
- err = gpio_request(host->rst, MG_RST_PIN);
- if (err)
- goto probe_err_3;
- gpio_direction_output(host->rst, 1);
-
- /* reset out pin */
- if (!(prv_data->dev_attr & MG_DEV_MASK)) {
- err = -EINVAL;
- goto probe_err_3a;
- }
-
- if (prv_data->dev_attr != MG_BOOT_DEV) {
- rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO,
- MG_RSTOUT_PIN);
- if (!rsc) {
- printk(KERN_ERR "%s:%d get reset-out pin fail\n",
- __func__, __LINE__);
- err = -EIO;
- goto probe_err_3a;
- }
- host->rstout = rsc->start;
- err = gpio_request(host->rstout, MG_RSTOUT_PIN);
- if (err)
- goto probe_err_3a;
- gpio_direction_input(host->rstout);
- }
-
- /* disk reset */
- if (prv_data->dev_attr == MG_STORAGE_DEV) {
- /* If POR seq. not yet finished, wait */
- err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT);
- if (err)
- goto probe_err_3b;
- err = mg_disk_init(host);
- if (err) {
- printk(KERN_ERR "%s:%d fail (err code : %d)\n",
- __func__, __LINE__, err);
- err = -EIO;
- goto probe_err_3b;
- }
- }
-
- /* get irq resource */
- if (!prv_data->use_polling) {
- host->irq = platform_get_irq(plat_dev, 0);
- if (host->irq == -ENXIO) {
- err = host->irq;
- goto probe_err_3b;
- }
- err = request_irq(host->irq, mg_irq,
- IRQF_TRIGGER_RISING,
- MG_DEV_NAME, host);
- if (err) {
- printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n",
- __func__, __LINE__, err);
- goto probe_err_3b;
- }
-
- }
-
- /* get disk id */
- err = mg_get_disk_id(host);
- if (err) {
- printk(KERN_ERR "%s:%d fail (err code : %d)\n",
- __func__, __LINE__, err);
- err = -EIO;
- goto probe_err_4;
- }
-
- err = register_blkdev(host->major, MG_DISK_NAME);
- if (err < 0) {
- printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n",
- __func__, __LINE__, err);
- goto probe_err_4;
- }
- if (!host->major)
- host->major = err;
-
- spin_lock_init(&host->lock);
-
- if (prv_data->use_polling)
- host->breq = blk_init_queue(mg_request_poll, &host->lock);
- else
- host->breq = blk_init_queue(mg_request, &host->lock);
-
- if (!host->breq) {
- err = -ENOMEM;
- printk(KERN_ERR "%s:%d (blk_init_queue) fail\n",
- __func__, __LINE__);
- goto probe_err_5;
- }
- host->breq->queuedata = host;
-
- /* mflash is random device, thanx for the noop */
- err = elevator_change(host->breq, "noop");
- if (err) {
- printk(KERN_ERR "%s:%d (elevator_init) fail\n",
- __func__, __LINE__);
- goto probe_err_6;
- }
- blk_queue_max_hw_sectors(host->breq, MG_MAX_SECTS);
- blk_queue_logical_block_size(host->breq, MG_SECTOR_SIZE);
-
- setup_timer(&host->timer, mg_times_out, (unsigned long)host);
-
- host->gd = alloc_disk(MG_DISK_MAX_PART);
- if (!host->gd) {
- printk(KERN_ERR "%s:%d (alloc_disk) fail\n",
- __func__, __LINE__);
- err = -ENOMEM;
- goto probe_err_7;
- }
- host->gd->major = host->major;
- host->gd->first_minor = 0;
- host->gd->fops = &mg_disk_ops;
- host->gd->queue = host->breq;
- host->gd->private_data = host;
- sprintf(host->gd->disk_name, MG_DISK_NAME"a");
-
- set_capacity(host->gd, host->n_sectors);
-
- add_disk(host->gd);
-
- return err;
-
-probe_err_7:
- del_timer_sync(&host->timer);
-probe_err_6:
- blk_cleanup_queue(host->breq);
-probe_err_5:
- unregister_blkdev(host->major, MG_DISK_NAME);
-probe_err_4:
- if (!prv_data->use_polling)
- free_irq(host->irq, host);
-probe_err_3b:
- gpio_free(host->rstout);
-probe_err_3a:
- gpio_free(host->rst);
-probe_err_3:
- iounmap(host->dev_base);
-probe_err_2:
- kfree(host);
-probe_err:
- return err;
-}
-
-static int mg_remove(struct platform_device *plat_dev)
-{
- struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
- struct mg_host *host = prv_data->host;
- int err = 0;
-
- /* delete timer */
- del_timer_sync(&host->timer);
-
- /* remove disk */
- if (host->gd) {
- del_gendisk(host->gd);
- put_disk(host->gd);
- }
- /* remove queue */
- if (host->breq)
- blk_cleanup_queue(host->breq);
-
- /* unregister blk device */
- unregister_blkdev(host->major, MG_DISK_NAME);
-
- /* free irq */
- if (!prv_data->use_polling)
- free_irq(host->irq, host);
-
- /* free reset-out pin */
- if (prv_data->dev_attr != MG_BOOT_DEV)
- gpio_free(host->rstout);
-
- /* free rst pin */
- if (host->rst)
- gpio_free(host->rst);
-
- /* unmap io */
- if (host->dev_base)
- iounmap(host->dev_base);
-
- /* free mg_host */
- kfree(host);
-
- return err;
-}
-
-static struct platform_driver mg_disk_driver = {
- .probe = mg_probe,
- .remove = mg_remove,
- .driver = {
- .name = MG_DEV_NAME,
- .pm = &mg_pm,
- }
-};
-
-/****************************************************************************
- *
- * Module stuff
- *
- ****************************************************************************/
-
-static int __init mg_init(void)
-{
- printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n");
- return platform_driver_register(&mg_disk_driver);
-}
-
-static void __exit mg_exit(void)
-{
- printk(KERN_INFO "mflash driver : bye bye\n");
- platform_driver_unregister(&mg_disk_driver);
-}
-
-module_init(mg_init);
-module_exit(mg_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("unsik Kim <donari75@gmail.com>");
-MODULE_DESCRIPTION("mGine m[g]flash device driver");
diff --git a/include/linux/mg_disk.h b/include/linux/mg_disk.h
deleted file mode 100644
index e11f4d9f1c2e..000000000000
--- a/include/linux/mg_disk.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * include/linux/mg_disk.c
- *
- * Private data for mflash platform driver
- *
- * (c) 2008 mGine Co.,LTD
- * (c) 2008 unsik Kim <donari75@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __MG_DISK_H__
-#define __MG_DISK_H__
-
-/* name for platform device */
-#define MG_DEV_NAME "mg_disk"
-
-/* names of GPIO resource */
-#define MG_RST_PIN "mg_rst"
-/* except MG_BOOT_DEV, reset-out pin should be assigned */
-#define MG_RSTOUT_PIN "mg_rstout"
-
-/* device attribution */
-/* use mflash as boot device */
-#define MG_BOOT_DEV (1 << 0)
-/* use mflash as storage device */
-#define MG_STORAGE_DEV (1 << 1)
-/* same as MG_STORAGE_DEV, but bootloader already done reset sequence */
-#define MG_STORAGE_DEV_SKIP_RST (1 << 2)
-
-/* private driver data */
-struct mg_drv_data {
- /* disk resource */
- u32 use_polling;
-
- /* device attribution */
- u32 dev_attr;
-
- /* internally used */
- void *host;
-};
-
-#endif
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 01/25] remove the mg_disk driver
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
This drivers was added in 2008, but as far as a I can tell we never had a
single platform that actually registered resources for the platform driver.
It's also been unmaintained for a long time and apparently has a ATA mode
that can be driven using the IDE/libata subsystem.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
Documentation/blockdev/mflash.txt | 84 ---
drivers/block/Kconfig | 17 -
drivers/block/Makefile | 1 -
drivers/block/mg_disk.c | 1110 -------------------------------------
include/linux/mg_disk.h | 45 --
5 files changed, 1257 deletions(-)
delete mode 100644 Documentation/blockdev/mflash.txt
delete mode 100644 drivers/block/mg_disk.c
delete mode 100644 include/linux/mg_disk.h
diff --git a/Documentation/blockdev/mflash.txt b/Documentation/blockdev/mflash.txt
deleted file mode 100644
index f7e050551487..000000000000
--- a/Documentation/blockdev/mflash.txt
+++ /dev/null
@@ -1,84 +0,0 @@
-This document describes m[g]flash support in linux.
-
-Contents
- 1. Overview
- 2. Reserved area configuration
- 3. Example of mflash platform driver registration
-
-1. Overview
-
-Mflash and gflash are embedded flash drive. The only difference is mflash is
-MCP(Multi Chip Package) device. These two device operate exactly same way.
-So the rest mflash repersents mflash and gflash altogether.
-
-Internally, mflash has nand flash and other hardware logics and supports
-2 different operation (ATA, IO) modes. ATA mode doesn't need any new
-driver and currently works well under standard IDE subsystem. Actually it's
-one chip SSD. IO mode is ATA-like custom mode for the host that doesn't have
-IDE interface.
-
-Following are brief descriptions about IO mode.
-A. IO mode based on ATA protocol and uses some custom command. (read confirm,
-write confirm)
-B. IO mode uses SRAM bus interface.
-C. IO mode supports 4kB boot area, so host can boot from mflash.
-
-2. Reserved area configuration
-If host boot from mflash, usually needs raw area for boot loader image. All of
-the mflash's block device operation will be taken this value as start offset.
-Note that boot loader's size of reserved area and kernel configuration value
-must be same.
-
-3. Example of mflash platform driver registration
-Working mflash is very straight forward. Adding platform device stuff to board
-configuration file is all. Here is some pseudo example.
-
-static struct mg_drv_data mflash_drv_data = {
- /* If you want to polling driver set to 1 */
- .use_polling = 0,
- /* device attribution */
- .dev_attr = MG_BOOT_DEV
-};
-
-static struct resource mg_mflash_rsc[] = {
- /* Base address of mflash */
- [0] = {
- .start = 0x08000000,
- .end = 0x08000000 + SZ_64K - 1,
- .flags = IORESOURCE_MEM
- },
- /* mflash interrupt pin */
- [1] = {
- .start = IRQ_GPIO(84),
- .end = IRQ_GPIO(84),
- .flags = IORESOURCE_IRQ
- },
- /* mflash reset pin */
- [2] = {
- .start = 43,
- .end = 43,
- .name = MG_RST_PIN,
- .flags = IORESOURCE_IO
- },
- /* mflash reset-out pin
- * If you use mflash as storage device (i.e. other than MG_BOOT_DEV),
- * should assign this */
- [3] = {
- .start = 51,
- .end = 51,
- .name = MG_RSTOUT_PIN,
- .flags = IORESOURCE_IO
- }
-};
-
-static struct platform_device mflash_dev = {
- .name = MG_DEV_NAME,
- .id = -1,
- .dev = {
- .platform_data = &mflash_drv_data,
- },
- .num_resources = ARRAY_SIZE(mg_mflash_rsc),
- .resource = mg_mflash_rsc
-};
-
-platform_device_register(&mflash_dev);
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index a1c2e816128f..ebe8c1a6195e 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -434,23 +434,6 @@ config ATA_OVER_ETH
This driver provides Support for ATA over Ethernet block
devices like the Coraid EtherDrive (R) Storage Blade.
-config MG_DISK
- tristate "mGine mflash, gflash support"
- depends on ARM && GPIOLIB
- help
- mGine mFlash(gFlash) block device driver
-
-config MG_DISK_RES
- int "Size of reserved area before MBR"
- depends on MG_DISK
- default 0
- help
- Define size of reserved area that usually used for boot. Unit is KB.
- All of the block device operation will be taken this value as start
- offset
- Examples:
- 1024 => 1 MB
-
config SUNVDC
tristate "Sun Virtual Disk Client support"
depends on SUN_LDOMS
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index b12c772bbeb3..5ceead8b52d7 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -19,7 +19,6 @@ obj-$(CONFIG_BLK_CPQ_CISS_DA) += cciss.o
obj-$(CONFIG_BLK_DEV_DAC960) += DAC960.o
obj-$(CONFIG_XILINX_SYSACE) += xsysace.o
obj-$(CONFIG_CDROM_PKTCDVD) += pktcdvd.o
-obj-$(CONFIG_MG_DISK) += mg_disk.o
obj-$(CONFIG_SUNVDC) += sunvdc.o
obj-$(CONFIG_BLK_DEV_SKD) += skd.o
obj-$(CONFIG_BLK_DEV_OSD) += osdblk.o
diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
deleted file mode 100644
index e88e7b06c616..000000000000
--- a/drivers/block/mg_disk.c
+++ /dev/null
@@ -1,1110 +0,0 @@
-/*
- * drivers/block/mg_disk.c
- *
- * Support for the mGine m[g]flash IO mode.
- * Based on legacy hd.c
- *
- * (c) 2008 mGine Co.,LTD
- * (c) 2008 unsik Kim <donari75 at gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/blkdev.h>
-#include <linux/hdreg.h>
-#include <linux/ata.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/mg_disk.h>
-#include <linux/slab.h>
-
-#define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)
-
-/* name for block device */
-#define MG_DISK_NAME "mgd"
-
-#define MG_DISK_MAJ 0
-#define MG_DISK_MAX_PART 16
-#define MG_SECTOR_SIZE 512
-#define MG_MAX_SECTS 256
-
-/* Register offsets */
-#define MG_BUFF_OFFSET 0x8000
-#define MG_REG_OFFSET 0xC000
-#define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */
-#define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */
-#define MG_REG_SECT_CNT (MG_REG_OFFSET + 4)
-#define MG_REG_SECT_NUM (MG_REG_OFFSET + 6)
-#define MG_REG_CYL_LOW (MG_REG_OFFSET + 8)
-#define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA)
-#define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC)
-#define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */
-#define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */
-#define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10)
-#define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12)
-
-/* handy status */
-#define MG_STAT_READY (ATA_DRDY | ATA_DSC)
-#define MG_READY_OK(s) (((s) & (MG_STAT_READY | (ATA_BUSY | ATA_DF | \
- ATA_ERR))) == MG_STAT_READY)
-
-/* error code for others */
-#define MG_ERR_NONE 0
-#define MG_ERR_TIMEOUT 0x100
-#define MG_ERR_INIT_STAT 0x101
-#define MG_ERR_TRANSLATION 0x102
-#define MG_ERR_CTRL_RST 0x103
-#define MG_ERR_INV_STAT 0x104
-#define MG_ERR_RSTOUT 0x105
-
-#define MG_MAX_ERRORS 6 /* Max read/write errors */
-
-/* command */
-#define MG_CMD_RD 0x20
-#define MG_CMD_WR 0x30
-#define MG_CMD_SLEEP 0x99
-#define MG_CMD_WAKEUP 0xC3
-#define MG_CMD_ID 0xEC
-#define MG_CMD_WR_CONF 0x3C
-#define MG_CMD_RD_CONF 0x40
-
-/* operation mode */
-#define MG_OP_CASCADE (1 << 0)
-#define MG_OP_CASCADE_SYNC_RD (1 << 1)
-#define MG_OP_CASCADE_SYNC_WR (1 << 2)
-#define MG_OP_INTERLEAVE (1 << 3)
-
-/* synchronous */
-#define MG_BURST_LAT_4 (3 << 4)
-#define MG_BURST_LAT_5 (4 << 4)
-#define MG_BURST_LAT_6 (5 << 4)
-#define MG_BURST_LAT_7 (6 << 4)
-#define MG_BURST_LAT_8 (7 << 4)
-#define MG_BURST_LEN_4 (1 << 1)
-#define MG_BURST_LEN_8 (2 << 1)
-#define MG_BURST_LEN_16 (3 << 1)
-#define MG_BURST_LEN_32 (4 << 1)
-#define MG_BURST_LEN_CONT (0 << 1)
-
-/* timeout value (unit: ms) */
-#define MG_TMAX_CONF_TO_CMD 1
-#define MG_TMAX_WAIT_RD_DRQ 10
-#define MG_TMAX_WAIT_WR_DRQ 500
-#define MG_TMAX_RST_TO_BUSY 10
-#define MG_TMAX_HDRST_TO_RDY 500
-#define MG_TMAX_SWRST_TO_RDY 500
-#define MG_TMAX_RSTOUT 3000
-
-#define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)
-
-/* main structure for mflash driver */
-struct mg_host {
- struct device *dev;
-
- struct request_queue *breq;
- struct request *req;
- spinlock_t lock;
- struct gendisk *gd;
-
- struct timer_list timer;
- void (*mg_do_intr) (struct mg_host *);
-
- u16 id[ATA_ID_WORDS];
-
- u16 cyls;
- u16 heads;
- u16 sectors;
- u32 n_sectors;
- u32 nres_sectors;
-
- void __iomem *dev_base;
- unsigned int irq;
- unsigned int rst;
- unsigned int rstout;
-
- u32 major;
- u32 error;
-};
-
-/*
- * Debugging macro and defines
- */
-#undef DO_MG_DEBUG
-#ifdef DO_MG_DEBUG
-# define MG_DBG(fmt, args...) \
- printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args)
-#else /* CONFIG_MG_DEBUG */
-# define MG_DBG(fmt, args...) do { } while (0)
-#endif /* CONFIG_MG_DEBUG */
-
-static void mg_request(struct request_queue *);
-
-static bool mg_end_request(struct mg_host *host, int err, unsigned int nr_bytes)
-{
- if (__blk_end_request(host->req, err, nr_bytes))
- return true;
-
- host->req = NULL;
- return false;
-}
-
-static bool mg_end_request_cur(struct mg_host *host, int err)
-{
- return mg_end_request(host, err, blk_rq_cur_bytes(host->req));
-}
-
-static void mg_dump_status(const char *msg, unsigned int stat,
- struct mg_host *host)
-{
- char *name = MG_DISK_NAME;
-
- if (host->req)
- name = host->req->rq_disk->disk_name;
-
- printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff);
- if (stat & ATA_BUSY)
- printk("Busy ");
- if (stat & ATA_DRDY)
- printk("DriveReady ");
- if (stat & ATA_DF)
- printk("WriteFault ");
- if (stat & ATA_DSC)
- printk("SeekComplete ");
- if (stat & ATA_DRQ)
- printk("DataRequest ");
- if (stat & ATA_CORR)
- printk("CorrectedError ");
- if (stat & ATA_ERR)
- printk("Error ");
- printk("}\n");
- if ((stat & ATA_ERR) == 0) {
- host->error = 0;
- } else {
- host->error = inb((unsigned long)host->dev_base + MG_REG_ERROR);
- printk(KERN_ERR "%s: %s: error=0x%02x { ", name, msg,
- host->error & 0xff);
- if (host->error & ATA_BBK)
- printk("BadSector ");
- if (host->error & ATA_UNC)
- printk("UncorrectableError ");
- if (host->error & ATA_IDNF)
- printk("SectorIdNotFound ");
- if (host->error & ATA_ABORTED)
- printk("DriveStatusError ");
- if (host->error & ATA_AMNF)
- printk("AddrMarkNotFound ");
- printk("}");
- if (host->error & (ATA_BBK | ATA_UNC | ATA_IDNF | ATA_AMNF)) {
- if (host->req)
- printk(", sector=%u",
- (unsigned int)blk_rq_pos(host->req));
- }
- printk("\n");
- }
-}
-
-static unsigned int mg_wait(struct mg_host *host, u32 expect, u32 msec)
-{
- u8 status;
- unsigned long expire, cur_jiffies;
- struct mg_drv_data *prv_data = host->dev->platform_data;
-
- host->error = MG_ERR_NONE;
- expire = jiffies + msecs_to_jiffies(msec);
-
- /* These 2 times dummy status read prevents reading invalid
- * status. A very little time (3 times of mflash operating clk)
- * is required for busy bit is set. Use dummy read instead of
- * busy wait, because mflash's PLL is machine dependent.
- */
- if (prv_data->use_polling) {
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- }
-
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
-
- do {
- cur_jiffies = jiffies;
- if (status & ATA_BUSY) {
- if (expect == ATA_BUSY)
- break;
- } else {
- /* Check the error condition! */
- if (status & ATA_ERR) {
- mg_dump_status("mg_wait", status, host);
- break;
- }
-
- if (expect == MG_STAT_READY)
- if (MG_READY_OK(status))
- break;
-
- if (expect == ATA_DRQ)
- if (status & ATA_DRQ)
- break;
- }
- if (!msec) {
- mg_dump_status("not ready", status, host);
- return MG_ERR_INV_STAT;
- }
-
- status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- } while (time_before(cur_jiffies, expire));
-
- if (time_after_eq(cur_jiffies, expire) && msec)
- host->error = MG_ERR_TIMEOUT;
-
- return host->error;
-}
-
-static unsigned int mg_wait_rstout(u32 rstout, u32 msec)
-{
- unsigned long expire;
-
- expire = jiffies + msecs_to_jiffies(msec);
- while (time_before(jiffies, expire)) {
- if (gpio_get_value(rstout) == 1)
- return MG_ERR_NONE;
- msleep(10);
- }
-
- return MG_ERR_RSTOUT;
-}
-
-static void mg_unexpected_intr(struct mg_host *host)
-{
- u32 status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
-
- mg_dump_status("mg_unexpected_intr", status, host);
-}
-
-static irqreturn_t mg_irq(int irq, void *dev_id)
-{
- struct mg_host *host = dev_id;
- void (*handler)(struct mg_host *) = host->mg_do_intr;
-
- spin_lock(&host->lock);
-
- host->mg_do_intr = NULL;
- del_timer(&host->timer);
- if (!handler)
- handler = mg_unexpected_intr;
- handler(host);
-
- spin_unlock(&host->lock);
-
- return IRQ_HANDLED;
-}
-
-/* local copy of ata_id_string() */
-static void mg_id_string(const u16 *id, unsigned char *s,
- unsigned int ofs, unsigned int len)
-{
- unsigned int c;
-
- BUG_ON(len & 1);
-
- while (len > 0) {
- c = id[ofs] >> 8;
- *s = c;
- s++;
-
- c = id[ofs] & 0xff;
- *s = c;
- s++;
-
- ofs++;
- len -= 2;
- }
-}
-
-/* local copy of ata_id_c_string() */
-static void mg_id_c_string(const u16 *id, unsigned char *s,
- unsigned int ofs, unsigned int len)
-{
- unsigned char *p;
-
- mg_id_string(id, s, ofs, len - 1);
-
- p = s + strnlen(s, len - 1);
- while (p > s && p[-1] == ' ')
- p--;
- *p = '\0';
-}
-
-static int mg_get_disk_id(struct mg_host *host)
-{
- u32 i;
- s32 err;
- const u16 *id = host->id;
- struct mg_drv_data *prv_data = host->dev->platform_data;
- char fwrev[ATA_ID_FW_REV_LEN + 1];
- char model[ATA_ID_PROD_LEN + 1];
- char serial[ATA_ID_SERNO_LEN + 1];
-
- if (!prv_data->use_polling)
- outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND);
- err = mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_RD_DRQ);
- if (err)
- return err;
-
- for (i = 0; i < (MG_SECTOR_SIZE >> 1); i++)
- host->id[i] = le16_to_cpu(inw((unsigned long)host->dev_base +
- MG_BUFF_OFFSET + i * 2));
-
- outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
- err = mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD);
- if (err)
- return err;
-
- if ((id[ATA_ID_FIELD_VALID] & 1) == 0)
- return MG_ERR_TRANSLATION;
-
- host->n_sectors = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
- host->cyls = id[ATA_ID_CYLS];
- host->heads = id[ATA_ID_HEADS];
- host->sectors = id[ATA_ID_SECTORS];
-
- if (MG_RES_SEC && host->heads && host->sectors) {
- /* modify cyls, n_sectors */
- host->cyls = (host->n_sectors - MG_RES_SEC) /
- host->heads / host->sectors;
- host->nres_sectors = host->n_sectors - host->cyls *
- host->heads * host->sectors;
- host->n_sectors -= host->nres_sectors;
- }
-
- mg_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev));
- mg_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
- mg_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
- printk(KERN_INFO "mg_disk: model: %s\n", model);
- printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev);
- printk(KERN_INFO "mg_disk: serial: %s\n", serial);
- printk(KERN_INFO "mg_disk: %d + reserved %d sectors\n",
- host->n_sectors, host->nres_sectors);
-
- if (!prv_data->use_polling)
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- return err;
-}
-
-
-static int mg_disk_init(struct mg_host *host)
-{
- struct mg_drv_data *prv_data = host->dev->platform_data;
- s32 err;
- u8 init_status;
-
- /* hdd rst low */
- gpio_set_value(host->rst, 0);
- err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY);
- if (err)
- return err;
-
- /* hdd rst high */
- gpio_set_value(host->rst, 1);
- err = mg_wait(host, MG_STAT_READY, MG_TMAX_HDRST_TO_RDY);
- if (err)
- return err;
-
- /* soft reset on */
- outb(ATA_SRST | (prv_data->use_polling ? ATA_NIEN : 0),
- (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY);
- if (err)
- return err;
-
- /* soft reset off */
- outb(prv_data->use_polling ? ATA_NIEN : 0,
- (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY);
- if (err)
- return err;
-
- init_status = inb((unsigned long)host->dev_base + MG_REG_STATUS) & 0xf;
-
- if (init_status == 0xf)
- return MG_ERR_INIT_STAT;
-
- return err;
-}
-
-static void mg_bad_rw_intr(struct mg_host *host)
-{
- if (host->req)
- if (++host->req->errors >= MG_MAX_ERRORS ||
- host->error == MG_ERR_TIMEOUT)
- mg_end_request_cur(host, -EIO);
-}
-
-static unsigned int mg_out(struct mg_host *host,
- unsigned int sect_num,
- unsigned int sect_cnt,
- unsigned int cmd,
- void (*intr_addr)(struct mg_host *))
-{
- struct mg_drv_data *prv_data = host->dev->platform_data;
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return host->error;
-
- if (!prv_data->use_polling) {
- host->mg_do_intr = intr_addr;
- mod_timer(&host->timer, jiffies + 3 * HZ);
- }
- if (MG_RES_SEC)
- sect_num += MG_RES_SEC;
- outb((u8)sect_cnt, (unsigned long)host->dev_base + MG_REG_SECT_CNT);
- outb((u8)sect_num, (unsigned long)host->dev_base + MG_REG_SECT_NUM);
- outb((u8)(sect_num >> 8), (unsigned long)host->dev_base +
- MG_REG_CYL_LOW);
- outb((u8)(sect_num >> 16), (unsigned long)host->dev_base +
- MG_REG_CYL_HIGH);
- outb((u8)((sect_num >> 24) | ATA_LBA | ATA_DEVICE_OBS),
- (unsigned long)host->dev_base + MG_REG_DRV_HEAD);
- outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND);
- return MG_ERR_NONE;
-}
-
-static void mg_read_one(struct mg_host *host, struct request *req)
-{
- u16 *buff = (u16 *)bio_data(req->bio);
- u32 i;
-
- for (i = 0; i < MG_SECTOR_SIZE >> 1; i++)
- *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET +
- (i << 1));
-}
-
-static void mg_read(struct request *req)
-{
- struct mg_host *host = req->rq_disk->private_data;
-
- if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req),
- MG_CMD_RD, NULL) != MG_ERR_NONE)
- mg_bad_rw_intr(host);
-
- MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
- blk_rq_sectors(req), blk_rq_pos(req), bio_data(req->bio));
-
- do {
- if (mg_wait(host, ATA_DRQ,
- MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
-
- mg_read_one(host, req);
-
- outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base +
- MG_REG_COMMAND);
- } while (mg_end_request(host, 0, MG_SECTOR_SIZE));
-}
-
-static void mg_write_one(struct mg_host *host, struct request *req)
-{
- u16 *buff = (u16 *)bio_data(req->bio);
- u32 i;
-
- for (i = 0; i < MG_SECTOR_SIZE >> 1; i++)
- outw(*buff++, (unsigned long)host->dev_base + MG_BUFF_OFFSET +
- (i << 1));
-}
-
-static void mg_write(struct request *req)
-{
- struct mg_host *host = req->rq_disk->private_data;
- unsigned int rem = blk_rq_sectors(req);
-
- if (mg_out(host, blk_rq_pos(req), rem,
- MG_CMD_WR, NULL) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
-
- MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
- rem, blk_rq_pos(req), bio_data(req->bio));
-
- if (mg_wait(host, ATA_DRQ,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
-
- do {
- mg_write_one(host, req);
-
- outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
- MG_REG_COMMAND);
-
- rem--;
- if (rem > 1 && mg_wait(host, ATA_DRQ,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- } else if (mg_wait(host, MG_STAT_READY,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return;
- }
- } while (mg_end_request(host, 0, MG_SECTOR_SIZE));
-}
-
-static void mg_read_intr(struct mg_host *host)
-{
- struct request *req = host->req;
- u32 i;
-
- /* check status */
- do {
- i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- if (i & ATA_BUSY)
- break;
- if (!MG_READY_OK(i))
- break;
- if (i & ATA_DRQ)
- goto ok_to_read;
- } while (0);
- mg_dump_status("mg_read_intr", i, host);
- mg_bad_rw_intr(host);
- mg_request(host->breq);
- return;
-
-ok_to_read:
- mg_read_one(host, req);
-
- MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
- blk_rq_pos(req), blk_rq_sectors(req) - 1, bio_data(req->bio));
-
- /* send read confirm */
- outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
-
- if (mg_end_request(host, 0, MG_SECTOR_SIZE)) {
- /* set handler if read remains */
- host->mg_do_intr = mg_read_intr;
- mod_timer(&host->timer, jiffies + 3 * HZ);
- } else /* goto next request */
- mg_request(host->breq);
-}
-
-static void mg_write_intr(struct mg_host *host)
-{
- struct request *req = host->req;
- u32 i;
- bool rem;
-
- /* check status */
- do {
- i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- if (i & ATA_BUSY)
- break;
- if (!MG_READY_OK(i))
- break;
- if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ))
- goto ok_to_write;
- } while (0);
- mg_dump_status("mg_write_intr", i, host);
- mg_bad_rw_intr(host);
- mg_request(host->breq);
- return;
-
-ok_to_write:
- if ((rem = mg_end_request(host, 0, MG_SECTOR_SIZE))) {
- /* write 1 sector and set handler if remains */
- mg_write_one(host, req);
- MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
- blk_rq_pos(req), blk_rq_sectors(req), bio_data(req->bio));
- host->mg_do_intr = mg_write_intr;
- mod_timer(&host->timer, jiffies + 3 * HZ);
- }
-
- /* send write confirm */
- outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
-
- if (!rem)
- mg_request(host->breq);
-}
-
-static void mg_times_out(unsigned long data)
-{
- struct mg_host *host = (struct mg_host *)data;
- char *name;
-
- spin_lock_irq(&host->lock);
-
- if (!host->req)
- goto out_unlock;
-
- host->mg_do_intr = NULL;
-
- name = host->req->rq_disk->disk_name;
- printk(KERN_DEBUG "%s: timeout\n", name);
-
- host->error = MG_ERR_TIMEOUT;
- mg_bad_rw_intr(host);
-
-out_unlock:
- mg_request(host->breq);
- spin_unlock_irq(&host->lock);
-}
-
-static void mg_request_poll(struct request_queue *q)
-{
- struct mg_host *host = q->queuedata;
-
- while (1) {
- if (!host->req) {
- host->req = blk_fetch_request(q);
- if (!host->req)
- break;
- }
-
- switch (req_op(host->req)) {
- case REQ_OP_READ:
- mg_read(host->req);
- break;
- case REQ_OP_WRITE:
- mg_write(host->req);
- break;
- default:
- mg_end_request_cur(host, -EIO);
- break;
- }
- }
-}
-
-static unsigned int mg_issue_req(struct request *req,
- struct mg_host *host,
- unsigned int sect_num,
- unsigned int sect_cnt)
-{
- switch (req_op(host->req)) {
- case REQ_OP_READ:
- if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr)
- != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return host->error;
- }
- break;
- case REQ_OP_WRITE:
- /* TODO : handler */
- outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr)
- != MG_ERR_NONE) {
- mg_bad_rw_intr(host);
- return host->error;
- }
- del_timer(&host->timer);
- mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ);
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- if (host->error) {
- mg_bad_rw_intr(host);
- return host->error;
- }
- mg_write_one(host, req);
- mod_timer(&host->timer, jiffies + 3 * HZ);
- outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
- MG_REG_COMMAND);
- break;
- default:
- mg_end_request_cur(host, -EIO);
- break;
- }
- return MG_ERR_NONE;
-}
-
-/* This function also called from IRQ context */
-static void mg_request(struct request_queue *q)
-{
- struct mg_host *host = q->queuedata;
- struct request *req;
- u32 sect_num, sect_cnt;
-
- while (1) {
- if (!host->req) {
- host->req = blk_fetch_request(q);
- if (!host->req)
- break;
- }
- req = host->req;
-
- /* check unwanted request call */
- if (host->mg_do_intr)
- return;
-
- del_timer(&host->timer);
-
- sect_num = blk_rq_pos(req);
- /* deal whole segments */
- sect_cnt = blk_rq_sectors(req);
-
- /* sanity check */
- if (sect_num >= get_capacity(req->rq_disk) ||
- ((sect_num + sect_cnt) >
- get_capacity(req->rq_disk))) {
- printk(KERN_WARNING
- "%s: bad access: sector=%d, count=%d\n",
- req->rq_disk->disk_name,
- sect_num, sect_cnt);
- mg_end_request_cur(host, -EIO);
- continue;
- }
-
- if (!mg_issue_req(req, host, sect_num, sect_cnt))
- return;
- }
-}
-
-static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo)
-{
- struct mg_host *host = bdev->bd_disk->private_data;
-
- geo->cylinders = (unsigned short)host->cyls;
- geo->heads = (unsigned char)host->heads;
- geo->sectors = (unsigned char)host->sectors;
- return 0;
-}
-
-static const struct block_device_operations mg_disk_ops = {
- .getgeo = mg_getgeo
-};
-
-#ifdef CONFIG_PM_SLEEP
-static int mg_suspend(struct device *dev)
-{
- struct mg_drv_data *prv_data = dev->platform_data;
- struct mg_host *host = prv_data->host;
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return -EIO;
-
- if (!prv_data->use_polling)
- outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND);
- /* wait until mflash deep sleep */
- msleep(1);
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) {
- if (!prv_data->use_polling)
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- return -EIO;
- }
-
- return 0;
-}
-
-static int mg_resume(struct device *dev)
-{
- struct mg_drv_data *prv_data = dev->platform_data;
- struct mg_host *host = prv_data->host;
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return -EIO;
-
- outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND);
- /* wait until mflash wakeup */
- msleep(1);
-
- if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
- return -EIO;
-
- if (!prv_data->use_polling)
- outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
-
- return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(mg_pm, mg_suspend, mg_resume);
-
-static int mg_probe(struct platform_device *plat_dev)
-{
- struct mg_host *host;
- struct resource *rsc;
- struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
- int err = 0;
-
- if (!prv_data) {
- printk(KERN_ERR "%s:%d fail (no driver_data)\n",
- __func__, __LINE__);
- err = -EINVAL;
- goto probe_err;
- }
-
- /* alloc mg_host */
- host = kzalloc(sizeof(struct mg_host), GFP_KERNEL);
- if (!host) {
- printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n",
- __func__, __LINE__);
- err = -ENOMEM;
- goto probe_err;
- }
- host->major = MG_DISK_MAJ;
-
- /* link each other */
- prv_data->host = host;
- host->dev = &plat_dev->dev;
-
- /* io remap */
- rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
- if (!rsc) {
- printk(KERN_ERR "%s:%d platform_get_resource fail\n",
- __func__, __LINE__);
- err = -EINVAL;
- goto probe_err_2;
- }
- host->dev_base = ioremap(rsc->start, resource_size(rsc));
- if (!host->dev_base) {
- printk(KERN_ERR "%s:%d ioremap fail\n",
- __func__, __LINE__);
- err = -EIO;
- goto probe_err_2;
- }
- MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base);
-
- /* get reset pin */
- rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO,
- MG_RST_PIN);
- if (!rsc) {
- printk(KERN_ERR "%s:%d get reset pin fail\n",
- __func__, __LINE__);
- err = -EIO;
- goto probe_err_3;
- }
- host->rst = rsc->start;
-
- /* init rst pin */
- err = gpio_request(host->rst, MG_RST_PIN);
- if (err)
- goto probe_err_3;
- gpio_direction_output(host->rst, 1);
-
- /* reset out pin */
- if (!(prv_data->dev_attr & MG_DEV_MASK)) {
- err = -EINVAL;
- goto probe_err_3a;
- }
-
- if (prv_data->dev_attr != MG_BOOT_DEV) {
- rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO,
- MG_RSTOUT_PIN);
- if (!rsc) {
- printk(KERN_ERR "%s:%d get reset-out pin fail\n",
- __func__, __LINE__);
- err = -EIO;
- goto probe_err_3a;
- }
- host->rstout = rsc->start;
- err = gpio_request(host->rstout, MG_RSTOUT_PIN);
- if (err)
- goto probe_err_3a;
- gpio_direction_input(host->rstout);
- }
-
- /* disk reset */
- if (prv_data->dev_attr == MG_STORAGE_DEV) {
- /* If POR seq. not yet finished, wait */
- err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT);
- if (err)
- goto probe_err_3b;
- err = mg_disk_init(host);
- if (err) {
- printk(KERN_ERR "%s:%d fail (err code : %d)\n",
- __func__, __LINE__, err);
- err = -EIO;
- goto probe_err_3b;
- }
- }
-
- /* get irq resource */
- if (!prv_data->use_polling) {
- host->irq = platform_get_irq(plat_dev, 0);
- if (host->irq == -ENXIO) {
- err = host->irq;
- goto probe_err_3b;
- }
- err = request_irq(host->irq, mg_irq,
- IRQF_TRIGGER_RISING,
- MG_DEV_NAME, host);
- if (err) {
- printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n",
- __func__, __LINE__, err);
- goto probe_err_3b;
- }
-
- }
-
- /* get disk id */
- err = mg_get_disk_id(host);
- if (err) {
- printk(KERN_ERR "%s:%d fail (err code : %d)\n",
- __func__, __LINE__, err);
- err = -EIO;
- goto probe_err_4;
- }
-
- err = register_blkdev(host->major, MG_DISK_NAME);
- if (err < 0) {
- printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n",
- __func__, __LINE__, err);
- goto probe_err_4;
- }
- if (!host->major)
- host->major = err;
-
- spin_lock_init(&host->lock);
-
- if (prv_data->use_polling)
- host->breq = blk_init_queue(mg_request_poll, &host->lock);
- else
- host->breq = blk_init_queue(mg_request, &host->lock);
-
- if (!host->breq) {
- err = -ENOMEM;
- printk(KERN_ERR "%s:%d (blk_init_queue) fail\n",
- __func__, __LINE__);
- goto probe_err_5;
- }
- host->breq->queuedata = host;
-
- /* mflash is random device, thanx for the noop */
- err = elevator_change(host->breq, "noop");
- if (err) {
- printk(KERN_ERR "%s:%d (elevator_init) fail\n",
- __func__, __LINE__);
- goto probe_err_6;
- }
- blk_queue_max_hw_sectors(host->breq, MG_MAX_SECTS);
- blk_queue_logical_block_size(host->breq, MG_SECTOR_SIZE);
-
- setup_timer(&host->timer, mg_times_out, (unsigned long)host);
-
- host->gd = alloc_disk(MG_DISK_MAX_PART);
- if (!host->gd) {
- printk(KERN_ERR "%s:%d (alloc_disk) fail\n",
- __func__, __LINE__);
- err = -ENOMEM;
- goto probe_err_7;
- }
- host->gd->major = host->major;
- host->gd->first_minor = 0;
- host->gd->fops = &mg_disk_ops;
- host->gd->queue = host->breq;
- host->gd->private_data = host;
- sprintf(host->gd->disk_name, MG_DISK_NAME"a");
-
- set_capacity(host->gd, host->n_sectors);
-
- add_disk(host->gd);
-
- return err;
-
-probe_err_7:
- del_timer_sync(&host->timer);
-probe_err_6:
- blk_cleanup_queue(host->breq);
-probe_err_5:
- unregister_blkdev(host->major, MG_DISK_NAME);
-probe_err_4:
- if (!prv_data->use_polling)
- free_irq(host->irq, host);
-probe_err_3b:
- gpio_free(host->rstout);
-probe_err_3a:
- gpio_free(host->rst);
-probe_err_3:
- iounmap(host->dev_base);
-probe_err_2:
- kfree(host);
-probe_err:
- return err;
-}
-
-static int mg_remove(struct platform_device *plat_dev)
-{
- struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
- struct mg_host *host = prv_data->host;
- int err = 0;
-
- /* delete timer */
- del_timer_sync(&host->timer);
-
- /* remove disk */
- if (host->gd) {
- del_gendisk(host->gd);
- put_disk(host->gd);
- }
- /* remove queue */
- if (host->breq)
- blk_cleanup_queue(host->breq);
-
- /* unregister blk device */
- unregister_blkdev(host->major, MG_DISK_NAME);
-
- /* free irq */
- if (!prv_data->use_polling)
- free_irq(host->irq, host);
-
- /* free reset-out pin */
- if (prv_data->dev_attr != MG_BOOT_DEV)
- gpio_free(host->rstout);
-
- /* free rst pin */
- if (host->rst)
- gpio_free(host->rst);
-
- /* unmap io */
- if (host->dev_base)
- iounmap(host->dev_base);
-
- /* free mg_host */
- kfree(host);
-
- return err;
-}
-
-static struct platform_driver mg_disk_driver = {
- .probe = mg_probe,
- .remove = mg_remove,
- .driver = {
- .name = MG_DEV_NAME,
- .pm = &mg_pm,
- }
-};
-
-/****************************************************************************
- *
- * Module stuff
- *
- ****************************************************************************/
-
-static int __init mg_init(void)
-{
- printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n");
- return platform_driver_register(&mg_disk_driver);
-}
-
-static void __exit mg_exit(void)
-{
- printk(KERN_INFO "mflash driver : bye bye\n");
- platform_driver_unregister(&mg_disk_driver);
-}
-
-module_init(mg_init);
-module_exit(mg_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("unsik Kim <donari75 at gmail.com>");
-MODULE_DESCRIPTION("mGine m[g]flash device driver");
diff --git a/include/linux/mg_disk.h b/include/linux/mg_disk.h
deleted file mode 100644
index e11f4d9f1c2e..000000000000
--- a/include/linux/mg_disk.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * include/linux/mg_disk.c
- *
- * Private data for mflash platform driver
- *
- * (c) 2008 mGine Co.,LTD
- * (c) 2008 unsik Kim <donari75 at gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __MG_DISK_H__
-#define __MG_DISK_H__
-
-/* name for platform device */
-#define MG_DEV_NAME "mg_disk"
-
-/* names of GPIO resource */
-#define MG_RST_PIN "mg_rst"
-/* except MG_BOOT_DEV, reset-out pin should be assigned */
-#define MG_RSTOUT_PIN "mg_rstout"
-
-/* device attribution */
-/* use mflash as boot device */
-#define MG_BOOT_DEV (1 << 0)
-/* use mflash as storage device */
-#define MG_STORAGE_DEV (1 << 1)
-/* same as MG_STORAGE_DEV, but bootloader already done reset sequence */
-#define MG_STORAGE_DEV_SKIP_RST (1 << 2)
-
-/* private driver data */
-struct mg_drv_data {
- /* disk resource */
- u32 use_polling;
-
- /* device attribution */
- u32 dev_attr;
-
- /* internally used */
- void *host;
-};
-
-#endif
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 01/25] remove the mg_disk driver
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-13 19:58 ` Bart Van Assche
-1 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 19:58 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> This drivers was added in 2008, but as far as a I can tell we never had a
> single platform that actually registered resources for the platform drive=
r.
>=20
> It's also been unmaintained for a long time and apparently has a ATA mode
> that can be driven using the IDE/libata subsystem.
Hello Christoph,
Should the person who submitted this driver be CC-ed for this patch (unsik
Kim <donari75@gmail.com>)?
Bart.=
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 01/25] remove the mg_disk driver
@ 2017-04-13 19:58 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 19:58 UTC (permalink / raw)
On Thu, 2017-04-06@17:39 +0200, Christoph Hellwig wrote:
> This drivers was added in 2008, but as far as a I can tell we never had a
> single platform that actually registered resources for the platform driver.
>
> It's also been unmaintained for a long time and apparently has a ATA mode
> that can be driven using the IDE/libata subsystem.
Hello Christoph,
Should the person who submitted this driver be CC-ed for this patch (unsik
Kim <donari75 at gmail.com>)?
Bart.
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 01/25] remove the mg_disk driver
@ 2017-04-13 19:58 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 19:58 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> This drivers was added in 2008, but as far as a I can tell we never had a
> single platform that actually registered resources for the platform driver.
>
> It's also been unmaintained for a long time and apparently has a ATA mode
> that can be driven using the IDE/libata subsystem.
Hello Christoph,
Should the person who submitted this driver be CC-ed for this patch (unsik
Kim <donari75@gmail.com>)?
Bart.
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 01/25] remove the mg_disk driver
2017-04-13 19:58 ` Bart Van Assche
@ 2017-04-14 8:21 ` hch
-1 siblings, 0 replies; 115+ messages in thread
From: hch @ 2017-04-14 8:21 UTC (permalink / raw)
To: Bart Van Assche
Cc: hch, axboe, linux-block, konrad.wilk, roger.pau, linux-scsi,
linux-nvme, jbacik, james.smart, dm-devel
On Thu, Apr 13, 2017 at 07:58:13PM +0000, Bart Van Assche wrote:
> Should the person who submitted this driver be CC-ed for this patch (unsik
> Kim <donari75@gmail.com>)?
Yes, he should. And in fact he was when I sent this patch out separately
a little earlier, I just included it in this series for reference.
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 02/25] block: remove the blk_execute_rq return value
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
The function only returns -EIO if rq->errors is non-zero, which is not
very useful and lets a large number of callers ignore the return value.
Just let the callers figure out their error themselves.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-exec.c | 8 +-------
block/scsi_ioctl.c | 3 ++-
drivers/block/paride/pd.c | 3 ++-
drivers/block/virtio_blk.c | 3 ++-
drivers/cdrom/cdrom.c | 3 ++-
drivers/ide/ide-atapi.c | 3 ++-
drivers/ide/ide-cd.c | 3 ++-
drivers/ide/ide-cd_ioctl.c | 3 ++-
drivers/ide/ide-devsets.c | 4 ++--
drivers/ide/ide-disk.c | 3 +--
drivers/ide/ide-ioctls.c | 7 ++++---
drivers/ide/ide-park.c | 3 ++-
drivers/ide/ide-pm.c | 3 ++-
drivers/ide/ide-taskfile.c | 4 ++--
drivers/scsi/osd/osd_initiator.c | 5 ++++-
fs/nfsd/blocklayout.c | 4 ++--
include/linux/blkdev.h | 2 +-
17 files changed, 35 insertions(+), 29 deletions(-)
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 8cd0e9bc8dc8..afa383248c7c 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -92,11 +92,10 @@ EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution and wait for completion.
*/
-int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
+void blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
struct request *rq, int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
- int err = 0;
unsigned long hang_check;
rq->end_io_data = &wait;
@@ -108,10 +107,5 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2)));
else
wait_for_completion_io(&wait);
-
- if (rq->errors)
- err = -EIO;
-
- return err;
}
EXPORT_SYMBOL(blk_execute_rq);
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 82a43bb19967..b1352143f12f 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -547,7 +547,8 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
scsi_req(rq)->cmd[0] = cmd;
scsi_req(rq)->cmd[4] = data;
scsi_req(rq)->cmd_len = 6;
- err = blk_execute_rq(q, bd_disk, rq, 0);
+ blk_execute_rq(q, bd_disk, rq, 0);
+ err = rq->errors ? -EIO : 0;
blk_put_request(rq);
return err;
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index b05e151c9b38..82c6d02193ae 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -747,7 +747,8 @@ static int pd_special_command(struct pd_unit *disk,
rq->special = func;
- err = blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);
+ blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);
+ err = req->errors ? -EIO : 0;
blk_put_request(rq);
return err;
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 2d8290169271..eaf99022bdc6 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -310,7 +310,8 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
if (err)
goto out;
- err = blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+ blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+ err = req->errors ? -EIO : 0;
out:
blk_put_request(req);
return err;
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 87739649eac2..308501730ab3 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2218,7 +2218,8 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
rq->timeout = 60 * HZ;
bio = rq->bio;
- if (blk_execute_rq(q, cdi->disk, rq, 0)) {
+ blk_execute_rq(q, cdi->disk, rq, 0);
+ if (rq->errors) {
struct request_sense *s = req->sense;
ret = -EIO;
cdi->last_sense = s->sense_key;
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index feb30061123b..1524797e1776 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -107,7 +107,8 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
memcpy(scsi_req(rq)->cmd, pc->c, 12);
if (drive->media == ide_tape)
scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1;
- error = blk_execute_rq(drive->queue, disk, rq, 0);
+ blk_execute_rq(drive->queue, disk, rq, 0);
+ error = rq->errors ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 74f1b7dc03f7..95c40afa9120 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -452,7 +452,8 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
}
}
- error = blk_execute_rq(drive->queue, info->disk, rq, 0);
+ blk_execute_rq(drive->queue, info->disk, rq, 0);
+ error = rq->errors ? -EIO : 0;
if (buffer)
*bufflen = scsi_req(rq)->resid_len;
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 9fcefbc8425e..f1ab726bd430 100644
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -307,7 +307,8 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
rq->rq_flags = RQF_QUIET;
- ret = blk_execute_rq(drive->queue, cd->disk, rq, 0);
+ blk_execute_rq(drive->queue, cd->disk, rq, 0);
+ ret = rq->errors ? -EIO : 0;
blk_put_request(rq);
/*
* A reset will unlock the door. If it was previously locked,
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
index a45dda5386e4..eea6a7cb80b5 100644
--- a/drivers/ide/ide-devsets.c
+++ b/drivers/ide/ide-devsets.c
@@ -173,8 +173,8 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
*(int *)&scsi_req(rq)->cmd[1] = arg;
rq->special = setting->set;
- if (blk_execute_rq(q, NULL, rq, 0))
- ret = rq->errors;
+ blk_execute_rq(q, NULL, rq, 0);
+ ret = rq->errors;
blk_put_request(rq);
return ret;
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 186159715b71..7c06237f3479 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -470,7 +470,6 @@ ide_devset_get(multcount, mult_count);
static int set_multcount(ide_drive_t *drive, int arg)
{
struct request *rq;
- int error;
if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
return -EINVAL;
@@ -484,7 +483,7 @@ static int set_multcount(ide_drive_t *drive, int arg)
drive->mult_req = arg;
drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
- error = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);
return (drive->mult_count == arg) ? 0 : -EIO;
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
index 248a3e0ceb46..3e96e531b367 100644
--- a/drivers/ide/ide-ioctls.c
+++ b/drivers/ide/ide-ioctls.c
@@ -128,7 +128,8 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
- err = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_execute_rq(drive->queue, NULL, rq, 0);
+ err = rq->errors ? -EIO : 0;
blk_put_request(rq);
return err;
@@ -227,8 +228,8 @@ static int generic_drive_reset(ide_drive_t *drive)
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
- if (blk_execute_rq(drive->queue, NULL, rq, 1))
- ret = rq->errors;
+ blk_execute_rq(drive->queue, NULL, rq, 1);
+ ret = rq->errors;
blk_put_request(rq);
return ret;
}
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
index 101aed9a61ca..b4f577016f5a 100644
--- a/drivers/ide/ide-park.c
+++ b/drivers/ide/ide-park.c
@@ -37,7 +37,8 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
scsi_req(rq)->cmd_len = 1;
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = &timeout;
- rc = blk_execute_rq(q, NULL, rq, 1);
+ blk_execute_rq(q, NULL, rq, 1);
+ rc = rq->errors ? -EIO : 0;
blk_put_request(rq);
if (rc)
goto out;
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index ec951be4b0c8..bf513f886f3c 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -27,7 +27,8 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
mesg.event = PM_EVENT_FREEZE;
rqpm.pm_state = mesg.event;
- ret = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_execute_rq(drive->queue, NULL, rq, 0);
+ ret = rq->errors ? -EIO : 0;
blk_put_request(rq);
if (ret == 0 && ide_port_acpi(hwif)) {
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 4c0007cb74e3..78924c7c9478 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -452,8 +452,8 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
rq->special = cmd;
cmd->rq = rq;
- error = blk_execute_rq(drive->queue, NULL, rq, 0);
-
+ blk_execute_rq(drive->queue, NULL, rq, 0);
+ error = rq->errors ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 9d0727b2bdec..44e03c3eb250 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -489,7 +489,10 @@ static void _set_error_resid(struct osd_request *or, struct request *req,
int osd_execute_request(struct osd_request *or)
{
- int error = blk_execute_rq(or->request->q, NULL, or->request, 0);
+ int error;
+
+ blk_execute_rq(or->request->q, NULL, or->request, 0);
+ error = or->request ? -EIO : 0;
_set_error_resid(or, or->request, error);
return error;
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 92b4b41d19d2..4b72fdf67548 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -242,8 +242,8 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
req->cmd[4] = bufflen & 0xff;
req->cmd_len = COMMAND_SIZE(INQUIRY);
- error = blk_execute_rq(rq->q, NULL, rq, 1);
- if (error) {
+ blk_execute_rq(rq->q, NULL, rq, 1);
+ if (rq->errors) {
pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
rq->errors);
goto out_put_request;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 3cf241b0814d..a03acd92ae74 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -971,7 +971,7 @@ extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, uns
extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
struct rq_map_data *, const struct iov_iter *,
gfp_t);
-extern int blk_execute_rq(struct request_queue *, struct gendisk *,
+extern void blk_execute_rq(struct request_queue *, struct gendisk *,
struct request *, int);
extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
struct request *, int, rq_end_io_fn *);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
The function only returns -EIO if rq->errors is non-zero, which is not
very useful and lets a large number of callers ignore the return value.
Just let the callers figure out their error themselves.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
block/blk-exec.c | 8 +-------
block/scsi_ioctl.c | 3 ++-
drivers/block/paride/pd.c | 3 ++-
drivers/block/virtio_blk.c | 3 ++-
drivers/cdrom/cdrom.c | 3 ++-
drivers/ide/ide-atapi.c | 3 ++-
drivers/ide/ide-cd.c | 3 ++-
drivers/ide/ide-cd_ioctl.c | 3 ++-
drivers/ide/ide-devsets.c | 4 ++--
drivers/ide/ide-disk.c | 3 +--
drivers/ide/ide-ioctls.c | 7 ++++---
drivers/ide/ide-park.c | 3 ++-
drivers/ide/ide-pm.c | 3 ++-
drivers/ide/ide-taskfile.c | 4 ++--
drivers/scsi/osd/osd_initiator.c | 5 ++++-
fs/nfsd/blocklayout.c | 4 ++--
include/linux/blkdev.h | 2 +-
17 files changed, 35 insertions(+), 29 deletions(-)
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 8cd0e9bc8dc8..afa383248c7c 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -92,11 +92,10 @@ EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution and wait for completion.
*/
-int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
+void blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
struct request *rq, int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
- int err = 0;
unsigned long hang_check;
rq->end_io_data = &wait;
@@ -108,10 +107,5 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2)));
else
wait_for_completion_io(&wait);
-
- if (rq->errors)
- err = -EIO;
-
- return err;
}
EXPORT_SYMBOL(blk_execute_rq);
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 82a43bb19967..b1352143f12f 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -547,7 +547,8 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
scsi_req(rq)->cmd[0] = cmd;
scsi_req(rq)->cmd[4] = data;
scsi_req(rq)->cmd_len = 6;
- err = blk_execute_rq(q, bd_disk, rq, 0);
+ blk_execute_rq(q, bd_disk, rq, 0);
+ err = rq->errors ? -EIO : 0;
blk_put_request(rq);
return err;
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index b05e151c9b38..82c6d02193ae 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -747,7 +747,8 @@ static int pd_special_command(struct pd_unit *disk,
rq->special = func;
- err = blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);
+ blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);
+ err = req->errors ? -EIO : 0;
blk_put_request(rq);
return err;
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 2d8290169271..eaf99022bdc6 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -310,7 +310,8 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
if (err)
goto out;
- err = blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+ blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+ err = req->errors ? -EIO : 0;
out:
blk_put_request(req);
return err;
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 87739649eac2..308501730ab3 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2218,7 +2218,8 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
rq->timeout = 60 * HZ;
bio = rq->bio;
- if (blk_execute_rq(q, cdi->disk, rq, 0)) {
+ blk_execute_rq(q, cdi->disk, rq, 0);
+ if (rq->errors) {
struct request_sense *s = req->sense;
ret = -EIO;
cdi->last_sense = s->sense_key;
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index feb30061123b..1524797e1776 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -107,7 +107,8 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
memcpy(scsi_req(rq)->cmd, pc->c, 12);
if (drive->media == ide_tape)
scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1;
- error = blk_execute_rq(drive->queue, disk, rq, 0);
+ blk_execute_rq(drive->queue, disk, rq, 0);
+ error = rq->errors ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 74f1b7dc03f7..95c40afa9120 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -452,7 +452,8 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
}
}
- error = blk_execute_rq(drive->queue, info->disk, rq, 0);
+ blk_execute_rq(drive->queue, info->disk, rq, 0);
+ error = rq->errors ? -EIO : 0;
if (buffer)
*bufflen = scsi_req(rq)->resid_len;
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 9fcefbc8425e..f1ab726bd430 100644
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -307,7 +307,8 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_MISC;
rq->rq_flags = RQF_QUIET;
- ret = blk_execute_rq(drive->queue, cd->disk, rq, 0);
+ blk_execute_rq(drive->queue, cd->disk, rq, 0);
+ ret = rq->errors ? -EIO : 0;
blk_put_request(rq);
/*
* A reset will unlock the door. If it was previously locked,
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
index a45dda5386e4..eea6a7cb80b5 100644
--- a/drivers/ide/ide-devsets.c
+++ b/drivers/ide/ide-devsets.c
@@ -173,8 +173,8 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
*(int *)&scsi_req(rq)->cmd[1] = arg;
rq->special = setting->set;
- if (blk_execute_rq(q, NULL, rq, 0))
- ret = rq->errors;
+ blk_execute_rq(q, NULL, rq, 0);
+ ret = rq->errors;
blk_put_request(rq);
return ret;
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 186159715b71..7c06237f3479 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -470,7 +470,6 @@ ide_devset_get(multcount, mult_count);
static int set_multcount(ide_drive_t *drive, int arg)
{
struct request *rq;
- int error;
if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
return -EINVAL;
@@ -484,7 +483,7 @@ static int set_multcount(ide_drive_t *drive, int arg)
drive->mult_req = arg;
drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
- error = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);
return (drive->mult_count == arg) ? 0 : -EIO;
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
index 248a3e0ceb46..3e96e531b367 100644
--- a/drivers/ide/ide-ioctls.c
+++ b/drivers/ide/ide-ioctls.c
@@ -128,7 +128,8 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
- err = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_execute_rq(drive->queue, NULL, rq, 0);
+ err = rq->errors ? -EIO : 0;
blk_put_request(rq);
return err;
@@ -227,8 +228,8 @@ static int generic_drive_reset(ide_drive_t *drive)
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
- if (blk_execute_rq(drive->queue, NULL, rq, 1))
- ret = rq->errors;
+ blk_execute_rq(drive->queue, NULL, rq, 1);
+ ret = rq->errors;
blk_put_request(rq);
return ret;
}
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
index 101aed9a61ca..b4f577016f5a 100644
--- a/drivers/ide/ide-park.c
+++ b/drivers/ide/ide-park.c
@@ -37,7 +37,8 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
scsi_req(rq)->cmd_len = 1;
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = &timeout;
- rc = blk_execute_rq(q, NULL, rq, 1);
+ blk_execute_rq(q, NULL, rq, 1);
+ rc = rq->errors ? -EIO : 0;
blk_put_request(rq);
if (rc)
goto out;
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index ec951be4b0c8..bf513f886f3c 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -27,7 +27,8 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
mesg.event = PM_EVENT_FREEZE;
rqpm.pm_state = mesg.event;
- ret = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_execute_rq(drive->queue, NULL, rq, 0);
+ ret = rq->errors ? -EIO : 0;
blk_put_request(rq);
if (ret == 0 && ide_port_acpi(hwif)) {
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 4c0007cb74e3..78924c7c9478 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -452,8 +452,8 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
rq->special = cmd;
cmd->rq = rq;
- error = blk_execute_rq(drive->queue, NULL, rq, 0);
-
+ blk_execute_rq(drive->queue, NULL, rq, 0);
+ error = rq->errors ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 9d0727b2bdec..44e03c3eb250 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -489,7 +489,10 @@ static void _set_error_resid(struct osd_request *or, struct request *req,
int osd_execute_request(struct osd_request *or)
{
- int error = blk_execute_rq(or->request->q, NULL, or->request, 0);
+ int error;
+
+ blk_execute_rq(or->request->q, NULL, or->request, 0);
+ error = or->request ? -EIO : 0;
_set_error_resid(or, or->request, error);
return error;
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 92b4b41d19d2..4b72fdf67548 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -242,8 +242,8 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
req->cmd[4] = bufflen & 0xff;
req->cmd_len = COMMAND_SIZE(INQUIRY);
- error = blk_execute_rq(rq->q, NULL, rq, 1);
- if (error) {
+ blk_execute_rq(rq->q, NULL, rq, 1);
+ if (rq->errors) {
pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
rq->errors);
goto out_put_request;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 3cf241b0814d..a03acd92ae74 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -971,7 +971,7 @@ extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, uns
extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
struct rq_map_data *, const struct iov_iter *,
gfp_t);
-extern int blk_execute_rq(struct request_queue *, struct gendisk *,
+extern void blk_execute_rq(struct request_queue *, struct gendisk *,
struct request *, int);
extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
struct request *, int, rq_end_io_fn *);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-06 18:38 ` Johannes Thumshirn
-1 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:38 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:21PM +0200, Christoph Hellwig wrote:
> The function only returns -EIO if rq->errors is non-zero, which is not
> very useful and lets a large number of callers ignore the return value.
>
> Just let the callers figure out their error themselves.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-06 18:38 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:38 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:21PM +0200, Christoph Hellwig wrote:
> The function only returns -EIO if rq->errors is non-zero, which is not
> very useful and lets a large number of callers ignore the return value.
>
> Just let the callers figure out their error themselves.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
--
Johannes Thumshirn Storage
jthumshirn at suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: Felix Imend?rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N?rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-06 18:38 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:38 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:21PM +0200, Christoph Hellwig wrote:
> The function only returns -EIO if rq->errors is non-zero, which is not
> very useful and lets a large number of callers ignore the return value.
>
> Just let the callers figure out their error themselves.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-13 20:03 ` Bart Van Assche
-1 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:03 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
> index 92b4b41d19d2..4b72fdf67548 100644
> --- a/fs/nfsd/blocklayout.c
> +++ b/fs/nfsd/blocklayout.c
> @@ -242,8 +242,8 @@ static int nfsd4_scsi_identify_device(struct block_de=
vice *bdev,
> req->cmd[4] =3D bufflen & 0xff;
> req->cmd_len =3D COMMAND_SIZE(INQUIRY);
> =20
> - error =3D blk_execute_rq(rq->q, NULL, rq, 1);
> - if (error) {
> + blk_execute_rq(rq->q, NULL, rq, 1);
> + if (rq->errors) {
> pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
> rq->errors);
> goto out_put_request;
Hello Christoph,
That blk_execute_rq() call can only be reached if a few lines above 0 was
assigned to the "error" variable. Since nfsd4_scsi_identify_device() return=
s
the value of the "error" variable I think -EIO should be assigned to that
variable before the "goto out_put_request" statement is reached.
Bart.=
^ permalink raw reply [flat|nested] 115+ messages in thread* [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-13 20:03 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:03 UTC (permalink / raw)
On Thu, 2017-04-06@17:39 +0200, Christoph Hellwig wrote:
> diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
> index 92b4b41d19d2..4b72fdf67548 100644
> --- a/fs/nfsd/blocklayout.c
> +++ b/fs/nfsd/blocklayout.c
> @@ -242,8 +242,8 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
> req->cmd[4] = bufflen & 0xff;
> req->cmd_len = COMMAND_SIZE(INQUIRY);
>
> - error = blk_execute_rq(rq->q, NULL, rq, 1);
> - if (error) {
> + blk_execute_rq(rq->q, NULL, rq, 1);
> + if (rq->errors) {
> pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
> rq->errors);
> goto out_put_request;
Hello Christoph,
That blk_execute_rq() call can only be reached if a few lines above 0 was
assigned to the "error" variable. Since nfsd4_scsi_identify_device() returns
the value of the "error" variable I think -EIO should be assigned to that
variable before the "goto out_put_request" statement is reached.
Bart.
^ permalink raw reply [flat|nested] 115+ messages in thread* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-13 20:03 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:03 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
> index 92b4b41d19d2..4b72fdf67548 100644
> --- a/fs/nfsd/blocklayout.c
> +++ b/fs/nfsd/blocklayout.c
> @@ -242,8 +242,8 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
> req->cmd[4] = bufflen & 0xff;
> req->cmd_len = COMMAND_SIZE(INQUIRY);
>
> - error = blk_execute_rq(rq->q, NULL, rq, 1);
> - if (error) {
> + blk_execute_rq(rq->q, NULL, rq, 1);
> + if (rq->errors) {
> pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
> rq->errors);
> goto out_put_request;
Hello Christoph,
That blk_execute_rq() call can only be reached if a few lines above 0 was
assigned to the "error" variable. Since nfsd4_scsi_identify_device() returns
the value of the "error" variable I think -EIO should be assigned to that
variable before the "goto out_put_request" statement is reached.
Bart.
^ permalink raw reply [flat|nested] 115+ messages in thread* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
2017-04-13 20:03 ` Bart Van Assche
@ 2017-04-14 8:22 ` hch
-1 siblings, 0 replies; 115+ messages in thread
From: hch @ 2017-04-14 8:22 UTC (permalink / raw)
To: Bart Van Assche
Cc: hch, axboe, linux-block, konrad.wilk, roger.pau, linux-scsi,
linux-nvme, jbacik, james.smart, dm-devel
On Thu, Apr 13, 2017 at 08:03:22PM +0000, Bart Van Assche wrote:
> That blk_execute_rq() call can only be reached if a few lines above 0 was
> assigned to the "error" variable. Since nfsd4_scsi_identify_device() returns
> the value of the "error" variable I think -EIO should be assigned to that
> variable before the "goto out_put_request" statement is reached.
You're right! I'll fix it up.
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-14 8:22 ` hch
0 siblings, 0 replies; 115+ messages in thread
From: hch @ 2017-04-14 8:22 UTC (permalink / raw)
On Thu, Apr 13, 2017@08:03:22PM +0000, Bart Van Assche wrote:
> That blk_execute_rq() call can only be reached if a few lines above 0 was
> assigned to the "error" variable. Since nfsd4_scsi_identify_device() returns
> the value of the "error" variable I think -EIO should be assigned to that
> variable before the "goto out_put_request" statement is reached.
You're right! I'll fix it up.
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
2017-04-14 8:22 ` hch
@ 2017-04-17 16:01 ` Jens Axboe
-1 siblings, 0 replies; 115+ messages in thread
From: Jens Axboe @ 2017-04-17 16:01 UTC (permalink / raw)
To: hch, Bart Van Assche
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On 04/14/2017 02:22 AM, hch@lst.de wrote:
> On Thu, Apr 13, 2017 at 08:03:22PM +0000, Bart Van Assche wrote:
>> That blk_execute_rq() call can only be reached if a few lines above 0 was
>> assigned to the "error" variable. Since nfsd4_scsi_identify_device() returns
>> the value of the "error" variable I think -EIO should be assigned to that
>> variable before the "goto out_put_request" statement is reached.
>
> You're right! I'll fix it up.
Are you respinning this series for 4.12?
--
Jens Axboe
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-17 16:01 ` Jens Axboe
0 siblings, 0 replies; 115+ messages in thread
From: Jens Axboe @ 2017-04-17 16:01 UTC (permalink / raw)
On 04/14/2017 02:22 AM, hch@lst.de wrote:
> On Thu, Apr 13, 2017@08:03:22PM +0000, Bart Van Assche wrote:
>> That blk_execute_rq() call can only be reached if a few lines above 0 was
>> assigned to the "error" variable. Since nfsd4_scsi_identify_device() returns
>> the value of the "error" variable I think -EIO should be assigned to that
>> variable before the "goto out_put_request" statement is reached.
>
> You're right! I'll fix it up.
Are you respinning this series for 4.12?
--
Jens Axboe
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
2017-04-17 16:01 ` Jens Axboe
(?)
@ 2017-04-18 7:50 ` hch
-1 siblings, 0 replies; 115+ messages in thread
From: hch @ 2017-04-18 7:50 UTC (permalink / raw)
To: Jens Axboe
Cc: hch, Bart Van Assche, linux-block, konrad.wilk, roger.pau,
linux-scsi, linux-nvme, jbacik, james.smart, dm-devel
On Mon, Apr 17, 2017 at 10:01:09AM -0600, Jens Axboe wrote:
> Are you respinning this series for 4.12?
Yes, I think I got enough feedback by now to resend it. I'll try to
get it out today.
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-18 7:50 ` hch
0 siblings, 0 replies; 115+ messages in thread
From: hch @ 2017-04-18 7:50 UTC (permalink / raw)
On Mon, Apr 17, 2017@10:01:09AM -0600, Jens Axboe wrote:
> Are you respinning this series for 4.12?
Yes, I think I got enough feedback by now to resend it. I'll try to
get it out today.
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 02/25] block: remove the blk_execute_rq return value
@ 2017-04-18 7:50 ` hch
0 siblings, 0 replies; 115+ messages in thread
From: hch @ 2017-04-18 7:50 UTC (permalink / raw)
To: Jens Axboe
Cc: linux-scsi, konrad.wilk, jbacik, james.smart, linux-nvme,
linux-block, dm-devel, Bart Van Assche, hch, roger.pau
On Mon, Apr 17, 2017 at 10:01:09AM -0600, Jens Axboe wrote:
> Are you respinning this series for 4.12?
Yes, I think I got enough feedback by now to resend it. I'll try to
get it out today.
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 03/25] nvme-fc: fix status code handling in nvme_fc_fcpio_done
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
nvme_complete_async_event expects the little endian status code
including the phase bit, and a new completion handler I plan to
introduce will do so as well.
Change the status variable into the little endian format with the
phase bit used in the NVMe CQE to fix / enable this.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/nvme/host/fc.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index fc42172c796a..aad7f9c0be32 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1147,7 +1147,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
struct nvme_fc_ctrl *ctrl = op->ctrl;
struct nvme_fc_queue *queue = op->queue;
struct nvme_completion *cqe = &op->rsp_iu.cqe;
- u16 status = NVME_SC_SUCCESS;
+ __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1);
/*
* WARNING:
@@ -1182,9 +1182,9 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
sizeof(op->rsp_iu), DMA_FROM_DEVICE);
if (atomic_read(&op->state) == FCPOP_STATE_ABORTED)
- status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
+ status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1);
else if (freq->status)
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
/*
* For the linux implementation, if we have an unsuccesful
@@ -1212,7 +1212,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
*/
if (freq->transferred_length !=
be32_to_cpu(op->cmd_iu.data_len)) {
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
op->nreq.result.u64 = 0;
@@ -1229,15 +1229,15 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
freq->transferred_length ||
op->rsp_iu.status_code ||
op->rqno != le16_to_cpu(cqe->command_id))) {
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
op->nreq.result = cqe->result;
- status = le16_to_cpu(cqe->status) >> 1;
+ status = cqe->status;
break;
default:
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
@@ -1249,7 +1249,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
return;
}
- blk_mq_complete_request(rq, status);
+ blk_mq_complete_request(rq, le16_to_cpu(status) >> 1);
}
static int
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 03/25] nvme-fc: fix status code handling in nvme_fc_fcpio_done
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
nvme_complete_async_event expects the little endian status code
including the phase bit, and a new completion handler I plan to
introduce will do so as well.
Change the status variable into the little endian format with the
phase bit used in the NVMe CQE to fix / enable this.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/nvme/host/fc.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index fc42172c796a..aad7f9c0be32 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1147,7 +1147,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
struct nvme_fc_ctrl *ctrl = op->ctrl;
struct nvme_fc_queue *queue = op->queue;
struct nvme_completion *cqe = &op->rsp_iu.cqe;
- u16 status = NVME_SC_SUCCESS;
+ __le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1);
/*
* WARNING:
@@ -1182,9 +1182,9 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
sizeof(op->rsp_iu), DMA_FROM_DEVICE);
if (atomic_read(&op->state) == FCPOP_STATE_ABORTED)
- status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
+ status = cpu_to_le16((NVME_SC_ABORT_REQ | NVME_SC_DNR) << 1);
else if (freq->status)
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
/*
* For the linux implementation, if we have an unsuccesful
@@ -1212,7 +1212,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
*/
if (freq->transferred_length !=
be32_to_cpu(op->cmd_iu.data_len)) {
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
op->nreq.result.u64 = 0;
@@ -1229,15 +1229,15 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
freq->transferred_length ||
op->rsp_iu.status_code ||
op->rqno != le16_to_cpu(cqe->command_id))) {
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
op->nreq.result = cqe->result;
- status = le16_to_cpu(cqe->status) >> 1;
+ status = cqe->status;
break;
default:
- status = NVME_SC_FC_TRANSPORT_ERROR;
+ status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
@@ -1249,7 +1249,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
return;
}
- blk_mq_complete_request(rq, status);
+ blk_mq_complete_request(rq, le16_to_cpu(status) >> 1);
}
static int
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 03/25] nvme-fc: fix status code handling in nvme_fc_fcpio_done
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-06 18:50 ` Johannes Thumshirn
-1 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:50 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:22PM +0200, Christoph Hellwig wrote:
> nvme_complete_async_event expects the little endian status code
> including the phase bit, and a new completion handler I plan to
> introduce will do so as well.
>
> Change the status variable into the little endian format with the
> phase bit used in the NVMe CQE to fix / enable this.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 03/25] nvme-fc: fix status code handling in nvme_fc_fcpio_done
@ 2017-04-06 18:50 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:50 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:22PM +0200, Christoph Hellwig wrote:
> nvme_complete_async_event expects the little endian status code
> including the phase bit, and a new completion handler I plan to
> introduce will do so as well.
>
> Change the status variable into the little endian format with the
> phase bit used in the NVMe CQE to fix / enable this.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
--
Johannes Thumshirn Storage
jthumshirn at suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: Felix Imend?rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N?rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 03/25] nvme-fc: fix status code handling in nvme_fc_fcpio_done
@ 2017-04-06 18:50 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:50 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:22PM +0200, Christoph Hellwig wrote:
> nvme_complete_async_event expects the little endian status code
> including the phase bit, and a new completion handler I plan to
> introduce will do so as well.
>
> Change the status variable into the little endian format with the
> phase bit used in the NVMe CQE to fix / enable this.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 04/25] nvme: split nvme status from block req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
We want our own clearly defined error field for NVMe passthrough commands,
and the request errors field is going away in its current form.
Just store the status and result field in the nvme_request field from
hardirq completion context (using a new helper) and then generate a
Linux errno for the block layer only when we actually need it.
Because we can't overload the status value with a negative error code
for cancelled command we now have a flags filed in struct nvme_request
that contains a bit for this condition.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/nvme/host/core.c | 50 +++++++++++++++++++++++++++-----------------
drivers/nvme/host/fc.c | 10 ++++-----
drivers/nvme/host/lightnvm.c | 9 +++++---
drivers/nvme/host/nvme.h | 33 +++++++++++++----------------
drivers/nvme/host/pci.c | 11 +++++-----
drivers/nvme/host/rdma.c | 5 ++---
drivers/nvme/target/loop.c | 7 ++-----
7 files changed, 65 insertions(+), 60 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index dc05f41c3992..b73a86a78379 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -66,11 +66,24 @@ static DEFINE_SPINLOCK(dev_list_lock);
static struct class *nvme_class;
+int nvme_error_status(struct request *req)
+{
+ switch (nvme_req(req)->status & 0x7ff) {
+ case NVME_SC_SUCCESS:
+ return 0;
+ case NVME_SC_CAP_EXCEEDED:
+ return -ENOSPC;
+ default:
+ return -EIO;
+ }
+}
+EXPORT_SYMBOL_GPL(nvme_error_status);
+
static inline bool nvme_req_needs_retry(struct request *req)
{
if (blk_noretry_request(req))
return false;
- if (req->errors & NVME_SC_DNR)
+ if (nvme_req(req)->status & NVME_SC_DNR)
return false;
if (jiffies - req->start_time >= req->timeout)
return false;
@@ -81,23 +94,13 @@ static inline bool nvme_req_needs_retry(struct request *req)
void nvme_complete_rq(struct request *req)
{
- int error = 0;
-
- if (unlikely(req->errors)) {
- if (nvme_req_needs_retry(req)) {
- nvme_req(req)->retries++;
- blk_mq_requeue_request(req,
- !blk_mq_queue_stopped(req->q));
- return;
- }
-
- if (blk_rq_is_passthrough(req))
- error = req->errors;
- else
- error = nvme_error_status(req->errors);
+ if (unlikely(nvme_req(req)->status && nvme_req_needs_retry(req))) {
+ nvme_req(req)->retries++;
+ blk_mq_requeue_request(req, !blk_mq_queue_stopped(req->q));
+ return;
}
- blk_mq_end_request(req, error);
+ blk_mq_end_request(req, nvme_error_status(req));
}
EXPORT_SYMBOL_GPL(nvme_complete_rq);
@@ -114,7 +117,9 @@ void nvme_cancel_request(struct request *req, void *data, bool reserved)
status = NVME_SC_ABORT_REQ;
if (blk_queue_dying(req->q))
status |= NVME_SC_DNR;
- blk_mq_complete_request(req, status);
+ nvme_req(req)->status = status;
+ blk_mq_complete_request(req, 0);
+
}
EXPORT_SYMBOL_GPL(nvme_cancel_request);
@@ -357,6 +362,7 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
if (!(req->rq_flags & RQF_DONTPREP)) {
nvme_req(req)->retries = 0;
+ nvme_req(req)->flags = 0;
req->rq_flags |= RQF_DONTPREP;
}
@@ -411,7 +417,10 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
blk_execute_rq(req->q, NULL, req, at_head);
if (result)
*result = nvme_req(req)->result;
- ret = req->errors;
+ if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
+ ret = -EINTR;
+ else
+ ret = nvme_req(req)->status;
out:
blk_mq_free_request(req);
return ret;
@@ -496,7 +505,10 @@ int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd,
}
submit:
blk_execute_rq(req->q, disk, req, 0);
- ret = req->errors;
+ if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
+ ret = -EINTR;
+ else
+ ret = nvme_req(req)->status;
if (result)
*result = le32_to_cpu(nvme_req(req)->result.u32);
if (meta && !ret && !write) {
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index aad7f9c0be32..450733c8cd24 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1148,6 +1148,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
struct nvme_fc_queue *queue = op->queue;
struct nvme_completion *cqe = &op->rsp_iu.cqe;
__le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1);
+ union nvme_result result;
/*
* WARNING:
@@ -1215,7 +1216,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
- op->nreq.result.u64 = 0;
+ result.u64 = 0;
break;
case sizeof(struct nvme_fc_ersp_iu):
@@ -1232,7 +1233,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
- op->nreq.result = cqe->result;
+ result = cqe->result;
status = cqe->status;
break;
@@ -1243,13 +1244,12 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
done:
if (!queue->qnum && op->rqno >= AEN_CMDID_BASE) {
- nvme_complete_async_event(&queue->ctrl->ctrl, status,
- &op->nreq.result);
+ nvme_complete_async_event(&queue->ctrl->ctrl, status, &result);
nvme_fc_ctrl_put(ctrl);
return;
}
- blk_mq_complete_request(rq, le16_to_cpu(status) >> 1);
+ nvme_end_request(rq, status, result);
}
static int
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 21cac8523bd8..3d7b92c4c577 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -484,7 +484,7 @@ static void nvme_nvm_end_io(struct request *rq, int error)
struct nvm_rq *rqd = rq->end_io_data;
rqd->ppa_status = nvme_req(rq)->result.u64;
- rqd->error = error;
+ rqd->error = nvme_req(req)->status;
nvm_end_io(rqd);
kfree(nvme_req(rq)->cmd);
@@ -681,9 +681,12 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
wait_for_completion_io(&wait);
- ret = nvme_error_status(rq->errors);
+ if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
+ ret = -EINTR;
+ else
+ ret = nvme_error_status(rq);
if (result)
- *result = rq->errors & 0x7ff;
+ *result = nvme_req(rq)->status & 0x7ff;
if (status)
*status = le64_to_cpu(nvme_req(rq)->result.u64);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 9eecb67177df..7a03a0897e0b 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -21,16 +21,6 @@
#include <linux/lightnvm.h>
#include <linux/sed-opal.h>
-enum {
- /*
- * Driver internal status code for commands that were cancelled due
- * to timeouts or controller shutdown. The value is negative so
- * that it a) doesn't overlap with the unsigned hardware error codes,
- * and b) can easily be tested for.
- */
- NVME_SC_CANCELLED = -EINTR,
-};
-
extern unsigned char nvme_io_timeout;
#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
@@ -91,6 +81,12 @@ struct nvme_request {
struct nvme_command *cmd;
union nvme_result result;
u8 retries;
+ u8 flags;
+ u16 status;
+};
+
+enum {
+ NVME_REQ_CANCELLED = (1 << 0),
};
static inline struct nvme_request *nvme_req(struct request *req)
@@ -248,18 +244,17 @@ static inline void nvme_cleanup_cmd(struct request *req)
}
}
-static inline int nvme_error_status(u16 status)
+static inline void nvme_end_request(struct request *req, __le16 status,
+ union nvme_result result)
{
- switch (status & 0x7ff) {
- case NVME_SC_SUCCESS:
- return 0;
- case NVME_SC_CAP_EXCEEDED:
- return -ENOSPC;
- default:
- return -EIO;
- }
+ struct nvme_request *rq = nvme_req(req);
+
+ rq->status = le16_to_cpu(status) >> 1;
+ rq->result = result;
+ blk_mq_complete_request(req, 0);
}
+int nvme_error_status(struct request *req);
void nvme_complete_rq(struct request *req);
void nvme_cancel_request(struct request *req, void *data, bool reserved);
bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 3818ab15a26e..f7b313e0cec8 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -679,8 +679,7 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag)
}
req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id);
- nvme_req(req)->result = cqe.result;
- blk_mq_complete_request(req, le16_to_cpu(cqe.status) >> 1);
+ nvme_end_request(req, cqe.status, cqe.result);
}
if (head == nvmeq->cq_head && phase == nvmeq->cq_phase)
@@ -817,9 +816,9 @@ static void abort_endio(struct request *req, int error)
{
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
struct nvme_queue *nvmeq = iod->nvmeq;
- u16 status = req->errors;
- dev_warn(nvmeq->dev->ctrl.device, "Abort status: 0x%x", status);
+ dev_warn(nvmeq->dev->ctrl.device,
+ "Abort status: 0x%x", nvme_req(req)->status);
atomic_inc(&nvmeq->dev->ctrl.abort_limit);
blk_mq_free_request(req);
}
@@ -843,7 +842,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
"I/O %d QID %d timeout, disable controller\n",
req->tag, nvmeq->qid);
nvme_dev_disable(dev, false);
- req->errors = NVME_SC_CANCELLED;
+ nvme_req(req)->flags |= NVME_REQ_CANCELLED;
return BLK_EH_HANDLED;
}
@@ -863,7 +862,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
* Mark the request as handled, since the inline shutdown
* forces all outstanding requests to complete.
*/
- req->errors = NVME_SC_CANCELLED;
+ nvme_req(req)->flags |= NVME_REQ_CANCELLED;
return BLK_EH_HANDLED;
}
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 4aae363943e3..53b611f9ba5d 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1178,8 +1178,7 @@ static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue,
wc->ex.invalidate_rkey == req->mr->rkey)
req->mr->need_inval = false;
- req->req.result = cqe->result;
- blk_mq_complete_request(rq, le16_to_cpu(cqe->status) >> 1);
+ nvme_end_request(rq, cqe->status, cqe->result);
return ret;
}
@@ -1416,7 +1415,7 @@ nvme_rdma_timeout(struct request *rq, bool reserved)
nvme_rdma_error_recovery(req->queue->ctrl);
/* fail with DNR on cmd timeout */
- rq->errors = NVME_SC_ABORT_REQ | NVME_SC_DNR;
+ nvme_req(rq)->status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
return BLK_EH_HANDLED;
}
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 33b431e4eec3..8260ee1f8e48 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -124,7 +124,6 @@ static void nvme_loop_queue_response(struct nvmet_req *req)
&cqe->result);
} else {
struct request *rq;
- struct nvme_loop_iod *iod;
rq = blk_mq_tag_to_rq(nvme_loop_tagset(queue), cqe->command_id);
if (!rq) {
@@ -134,9 +133,7 @@ static void nvme_loop_queue_response(struct nvmet_req *req)
return;
}
- iod = blk_mq_rq_to_pdu(rq);
- iod->nvme_req.result = cqe->result;
- blk_mq_complete_request(rq, le16_to_cpu(cqe->status) >> 1);
+ nvme_end_request(rq, cqe->status, cqe->result);
}
}
@@ -157,7 +154,7 @@ nvme_loop_timeout(struct request *rq, bool reserved)
schedule_work(&iod->queue->ctrl->reset_work);
/* fail with DNR on admin cmd timeout */
- rq->errors = NVME_SC_ABORT_REQ | NVME_SC_DNR;
+ nvme_req(rq)->status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
return BLK_EH_HANDLED;
}
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 04/25] nvme: split nvme status from block req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
We want our own clearly defined error field for NVMe passthrough commands,
and the request errors field is going away in its current form.
Just store the status and result field in the nvme_request field from
hardirq completion context (using a new helper) and then generate a
Linux errno for the block layer only when we actually need it.
Because we can't overload the status value with a negative error code
for cancelled command we now have a flags filed in struct nvme_request
that contains a bit for this condition.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/nvme/host/core.c | 50 +++++++++++++++++++++++++++-----------------
drivers/nvme/host/fc.c | 10 ++++-----
drivers/nvme/host/lightnvm.c | 9 +++++---
drivers/nvme/host/nvme.h | 33 +++++++++++++----------------
drivers/nvme/host/pci.c | 11 +++++-----
drivers/nvme/host/rdma.c | 5 ++---
drivers/nvme/target/loop.c | 7 ++-----
7 files changed, 65 insertions(+), 60 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index dc05f41c3992..b73a86a78379 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -66,11 +66,24 @@ static DEFINE_SPINLOCK(dev_list_lock);
static struct class *nvme_class;
+int nvme_error_status(struct request *req)
+{
+ switch (nvme_req(req)->status & 0x7ff) {
+ case NVME_SC_SUCCESS:
+ return 0;
+ case NVME_SC_CAP_EXCEEDED:
+ return -ENOSPC;
+ default:
+ return -EIO;
+ }
+}
+EXPORT_SYMBOL_GPL(nvme_error_status);
+
static inline bool nvme_req_needs_retry(struct request *req)
{
if (blk_noretry_request(req))
return false;
- if (req->errors & NVME_SC_DNR)
+ if (nvme_req(req)->status & NVME_SC_DNR)
return false;
if (jiffies - req->start_time >= req->timeout)
return false;
@@ -81,23 +94,13 @@ static inline bool nvme_req_needs_retry(struct request *req)
void nvme_complete_rq(struct request *req)
{
- int error = 0;
-
- if (unlikely(req->errors)) {
- if (nvme_req_needs_retry(req)) {
- nvme_req(req)->retries++;
- blk_mq_requeue_request(req,
- !blk_mq_queue_stopped(req->q));
- return;
- }
-
- if (blk_rq_is_passthrough(req))
- error = req->errors;
- else
- error = nvme_error_status(req->errors);
+ if (unlikely(nvme_req(req)->status && nvme_req_needs_retry(req))) {
+ nvme_req(req)->retries++;
+ blk_mq_requeue_request(req, !blk_mq_queue_stopped(req->q));
+ return;
}
- blk_mq_end_request(req, error);
+ blk_mq_end_request(req, nvme_error_status(req));
}
EXPORT_SYMBOL_GPL(nvme_complete_rq);
@@ -114,7 +117,9 @@ void nvme_cancel_request(struct request *req, void *data, bool reserved)
status = NVME_SC_ABORT_REQ;
if (blk_queue_dying(req->q))
status |= NVME_SC_DNR;
- blk_mq_complete_request(req, status);
+ nvme_req(req)->status = status;
+ blk_mq_complete_request(req, 0);
+
}
EXPORT_SYMBOL_GPL(nvme_cancel_request);
@@ -357,6 +362,7 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
if (!(req->rq_flags & RQF_DONTPREP)) {
nvme_req(req)->retries = 0;
+ nvme_req(req)->flags = 0;
req->rq_flags |= RQF_DONTPREP;
}
@@ -411,7 +417,10 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
blk_execute_rq(req->q, NULL, req, at_head);
if (result)
*result = nvme_req(req)->result;
- ret = req->errors;
+ if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
+ ret = -EINTR;
+ else
+ ret = nvme_req(req)->status;
out:
blk_mq_free_request(req);
return ret;
@@ -496,7 +505,10 @@ int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd,
}
submit:
blk_execute_rq(req->q, disk, req, 0);
- ret = req->errors;
+ if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
+ ret = -EINTR;
+ else
+ ret = nvme_req(req)->status;
if (result)
*result = le32_to_cpu(nvme_req(req)->result.u32);
if (meta && !ret && !write) {
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index aad7f9c0be32..450733c8cd24 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1148,6 +1148,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
struct nvme_fc_queue *queue = op->queue;
struct nvme_completion *cqe = &op->rsp_iu.cqe;
__le16 status = cpu_to_le16(NVME_SC_SUCCESS << 1);
+ union nvme_result result;
/*
* WARNING:
@@ -1215,7 +1216,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
- op->nreq.result.u64 = 0;
+ result.u64 = 0;
break;
case sizeof(struct nvme_fc_ersp_iu):
@@ -1232,7 +1233,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
status = cpu_to_le16(NVME_SC_FC_TRANSPORT_ERROR << 1);
goto done;
}
- op->nreq.result = cqe->result;
+ result = cqe->result;
status = cqe->status;
break;
@@ -1243,13 +1244,12 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
done:
if (!queue->qnum && op->rqno >= AEN_CMDID_BASE) {
- nvme_complete_async_event(&queue->ctrl->ctrl, status,
- &op->nreq.result);
+ nvme_complete_async_event(&queue->ctrl->ctrl, status, &result);
nvme_fc_ctrl_put(ctrl);
return;
}
- blk_mq_complete_request(rq, le16_to_cpu(status) >> 1);
+ nvme_end_request(rq, status, result);
}
static int
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 21cac8523bd8..3d7b92c4c577 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -484,7 +484,7 @@ static void nvme_nvm_end_io(struct request *rq, int error)
struct nvm_rq *rqd = rq->end_io_data;
rqd->ppa_status = nvme_req(rq)->result.u64;
- rqd->error = error;
+ rqd->error = nvme_req(req)->status;
nvm_end_io(rqd);
kfree(nvme_req(rq)->cmd);
@@ -681,9 +681,12 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
wait_for_completion_io(&wait);
- ret = nvme_error_status(rq->errors);
+ if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
+ ret = -EINTR;
+ else
+ ret = nvme_error_status(rq);
if (result)
- *result = rq->errors & 0x7ff;
+ *result = nvme_req(rq)->status & 0x7ff;
if (status)
*status = le64_to_cpu(nvme_req(rq)->result.u64);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 9eecb67177df..7a03a0897e0b 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -21,16 +21,6 @@
#include <linux/lightnvm.h>
#include <linux/sed-opal.h>
-enum {
- /*
- * Driver internal status code for commands that were cancelled due
- * to timeouts or controller shutdown. The value is negative so
- * that it a) doesn't overlap with the unsigned hardware error codes,
- * and b) can easily be tested for.
- */
- NVME_SC_CANCELLED = -EINTR,
-};
-
extern unsigned char nvme_io_timeout;
#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
@@ -91,6 +81,12 @@ struct nvme_request {
struct nvme_command *cmd;
union nvme_result result;
u8 retries;
+ u8 flags;
+ u16 status;
+};
+
+enum {
+ NVME_REQ_CANCELLED = (1 << 0),
};
static inline struct nvme_request *nvme_req(struct request *req)
@@ -248,18 +244,17 @@ static inline void nvme_cleanup_cmd(struct request *req)
}
}
-static inline int nvme_error_status(u16 status)
+static inline void nvme_end_request(struct request *req, __le16 status,
+ union nvme_result result)
{
- switch (status & 0x7ff) {
- case NVME_SC_SUCCESS:
- return 0;
- case NVME_SC_CAP_EXCEEDED:
- return -ENOSPC;
- default:
- return -EIO;
- }
+ struct nvme_request *rq = nvme_req(req);
+
+ rq->status = le16_to_cpu(status) >> 1;
+ rq->result = result;
+ blk_mq_complete_request(req, 0);
}
+int nvme_error_status(struct request *req);
void nvme_complete_rq(struct request *req);
void nvme_cancel_request(struct request *req, void *data, bool reserved);
bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 3818ab15a26e..f7b313e0cec8 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -679,8 +679,7 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag)
}
req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id);
- nvme_req(req)->result = cqe.result;
- blk_mq_complete_request(req, le16_to_cpu(cqe.status) >> 1);
+ nvme_end_request(req, cqe.status, cqe.result);
}
if (head == nvmeq->cq_head && phase == nvmeq->cq_phase)
@@ -817,9 +816,9 @@ static void abort_endio(struct request *req, int error)
{
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
struct nvme_queue *nvmeq = iod->nvmeq;
- u16 status = req->errors;
- dev_warn(nvmeq->dev->ctrl.device, "Abort status: 0x%x", status);
+ dev_warn(nvmeq->dev->ctrl.device,
+ "Abort status: 0x%x", nvme_req(req)->status);
atomic_inc(&nvmeq->dev->ctrl.abort_limit);
blk_mq_free_request(req);
}
@@ -843,7 +842,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
"I/O %d QID %d timeout, disable controller\n",
req->tag, nvmeq->qid);
nvme_dev_disable(dev, false);
- req->errors = NVME_SC_CANCELLED;
+ nvme_req(req)->flags |= NVME_REQ_CANCELLED;
return BLK_EH_HANDLED;
}
@@ -863,7 +862,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
* Mark the request as handled, since the inline shutdown
* forces all outstanding requests to complete.
*/
- req->errors = NVME_SC_CANCELLED;
+ nvme_req(req)->flags |= NVME_REQ_CANCELLED;
return BLK_EH_HANDLED;
}
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 4aae363943e3..53b611f9ba5d 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1178,8 +1178,7 @@ static int nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue,
wc->ex.invalidate_rkey == req->mr->rkey)
req->mr->need_inval = false;
- req->req.result = cqe->result;
- blk_mq_complete_request(rq, le16_to_cpu(cqe->status) >> 1);
+ nvme_end_request(rq, cqe->status, cqe->result);
return ret;
}
@@ -1416,7 +1415,7 @@ nvme_rdma_timeout(struct request *rq, bool reserved)
nvme_rdma_error_recovery(req->queue->ctrl);
/* fail with DNR on cmd timeout */
- rq->errors = NVME_SC_ABORT_REQ | NVME_SC_DNR;
+ nvme_req(rq)->status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
return BLK_EH_HANDLED;
}
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 33b431e4eec3..8260ee1f8e48 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -124,7 +124,6 @@ static void nvme_loop_queue_response(struct nvmet_req *req)
&cqe->result);
} else {
struct request *rq;
- struct nvme_loop_iod *iod;
rq = blk_mq_tag_to_rq(nvme_loop_tagset(queue), cqe->command_id);
if (!rq) {
@@ -134,9 +133,7 @@ static void nvme_loop_queue_response(struct nvmet_req *req)
return;
}
- iod = blk_mq_rq_to_pdu(rq);
- iod->nvme_req.result = cqe->result;
- blk_mq_complete_request(rq, le16_to_cpu(cqe->status) >> 1);
+ nvme_end_request(rq, cqe->status, cqe->result);
}
}
@@ -157,7 +154,7 @@ nvme_loop_timeout(struct request *rq, bool reserved)
schedule_work(&iod->queue->ctrl->reset_work);
/* fail with DNR on admin cmd timeout */
- rq->errors = NVME_SC_ABORT_REQ | NVME_SC_DNR;
+ nvme_req(rq)->status = NVME_SC_ABORT_REQ | NVME_SC_DNR;
return BLK_EH_HANDLED;
}
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 04/25] nvme: split nvme status from block req->errors
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-06 18:47 ` Johannes Thumshirn
-1 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:47 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:23PM +0200, Christoph Hellwig wrote:
> We want our own clearly defined error field for NVMe passthrough commands,
> and the request errors field is going away in its current form.
>
> Just store the status and result field in the nvme_request field from
> hardirq completion context (using a new helper) and then generate a
> Linux errno for the block layer only when we actually need it.
>
> Because we can't overload the status value with a negative error code
> for cancelled command we now have a flags filed in struct nvme_request
> that contains a bit for this condition.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 04/25] nvme: split nvme status from block req->errors
@ 2017-04-06 18:47 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:47 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:23PM +0200, Christoph Hellwig wrote:
> We want our own clearly defined error field for NVMe passthrough commands,
> and the request errors field is going away in its current form.
>
> Just store the status and result field in the nvme_request field from
> hardirq completion context (using a new helper) and then generate a
> Linux errno for the block layer only when we actually need it.
>
> Because we can't overload the status value with a negative error code
> for cancelled command we now have a flags filed in struct nvme_request
> that contains a bit for this condition.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
--
Johannes Thumshirn Storage
jthumshirn at suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: Felix Imend?rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N?rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 04/25] nvme: split nvme status from block req->errors
@ 2017-04-06 18:47 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:47 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:23PM +0200, Christoph Hellwig wrote:
> We want our own clearly defined error field for NVMe passthrough commands,
> and the request errors field is going away in its current form.
>
> Just store the status and result field in the nvme_request field from
> hardirq completion context (using a new helper) and then generate a
> Linux errno for the block layer only when we actually need it.
>
> Because we can't overload the status value with a negative error code
> for cancelled command we now have a flags filed in struct nvme_request
> that contains a bit for this condition.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 05/25] nvme: make nvme_error_status private
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Currently it's used by the lighnvm passthrough ioctl, but we'd like to make
it private in preparation of block layer specific error code. Lighnvm already
returns the real NVMe status anyway, so I think we can just limit it to
returning -EIO for any status set.
This will need a careful audit from the lightnvm folks, though.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/nvme/host/core.c | 3 +--
drivers/nvme/host/lightnvm.c | 8 ++++----
drivers/nvme/host/nvme.h | 1 -
3 files changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index b73a86a78379..fbc7d64b6f10 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -66,7 +66,7 @@ static DEFINE_SPINLOCK(dev_list_lock);
static struct class *nvme_class;
-int nvme_error_status(struct request *req)
+static int nvme_error_status(struct request *req)
{
switch (nvme_req(req)->status & 0x7ff) {
case NVME_SC_SUCCESS:
@@ -77,7 +77,6 @@ int nvme_error_status(struct request *req)
return -EIO;
}
}
-EXPORT_SYMBOL_GPL(nvme_error_status);
static inline bool nvme_req_needs_retry(struct request *req)
{
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 3d7b92c4c577..69067833b242 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -484,7 +484,7 @@ static void nvme_nvm_end_io(struct request *rq, int error)
struct nvm_rq *rqd = rq->end_io_data;
rqd->ppa_status = nvme_req(rq)->result.u64;
- rqd->error = nvme_req(req)->status;
+ rqd->error = nvme_req(rq)->status;
nvm_end_io(rqd);
kfree(nvme_req(rq)->cmd);
@@ -611,7 +611,7 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
__le64 *metadata = NULL;
dma_addr_t metadata_dma;
DECLARE_COMPLETION_ONSTACK(wait);
- int ret;
+ int ret = 0;
rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
NVME_QID_ANY);
@@ -683,8 +683,8 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
- else
- ret = nvme_error_status(rq);
+ else if (nvme_req(rq)->status & 0x7ff)
+ ret = -EIO;
if (result)
*result = nvme_req(rq)->status & 0x7ff;
if (status)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 7a03a0897e0b..4dc930d3545d 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -254,7 +254,6 @@ static inline void nvme_end_request(struct request *req, __le16 status,
blk_mq_complete_request(req, 0);
}
-int nvme_error_status(struct request *req);
void nvme_complete_rq(struct request *req);
void nvme_cancel_request(struct request *req, void *data, bool reserved);
bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 05/25] nvme: make nvme_error_status private
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Currently it's used by the lighnvm passthrough ioctl, but we'd like to make
it private in preparation of block layer specific error code. Lighnvm already
returns the real NVMe status anyway, so I think we can just limit it to
returning -EIO for any status set.
This will need a careful audit from the lightnvm folks, though.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/nvme/host/core.c | 3 +--
drivers/nvme/host/lightnvm.c | 8 ++++----
drivers/nvme/host/nvme.h | 1 -
3 files changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index b73a86a78379..fbc7d64b6f10 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -66,7 +66,7 @@ static DEFINE_SPINLOCK(dev_list_lock);
static struct class *nvme_class;
-int nvme_error_status(struct request *req)
+static int nvme_error_status(struct request *req)
{
switch (nvme_req(req)->status & 0x7ff) {
case NVME_SC_SUCCESS:
@@ -77,7 +77,6 @@ int nvme_error_status(struct request *req)
return -EIO;
}
}
-EXPORT_SYMBOL_GPL(nvme_error_status);
static inline bool nvme_req_needs_retry(struct request *req)
{
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 3d7b92c4c577..69067833b242 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -484,7 +484,7 @@ static void nvme_nvm_end_io(struct request *rq, int error)
struct nvm_rq *rqd = rq->end_io_data;
rqd->ppa_status = nvme_req(rq)->result.u64;
- rqd->error = nvme_req(req)->status;
+ rqd->error = nvme_req(rq)->status;
nvm_end_io(rqd);
kfree(nvme_req(rq)->cmd);
@@ -611,7 +611,7 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
__le64 *metadata = NULL;
dma_addr_t metadata_dma;
DECLARE_COMPLETION_ONSTACK(wait);
- int ret;
+ int ret = 0;
rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
NVME_QID_ANY);
@@ -683,8 +683,8 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
- else
- ret = nvme_error_status(rq);
+ else if (nvme_req(rq)->status & 0x7ff)
+ ret = -EIO;
if (result)
*result = nvme_req(rq)->status & 0x7ff;
if (status)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 7a03a0897e0b..4dc930d3545d 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -254,7 +254,6 @@ static inline void nvme_end_request(struct request *req, __le16 status,
blk_mq_complete_request(req, 0);
}
-int nvme_error_status(struct request *req);
void nvme_complete_rq(struct request *req);
void nvme_cancel_request(struct request *req, void *data, bool reserved);
bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/virtio_blk.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index eaf99022bdc6..dbc4e80680b1 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -111,7 +111,7 @@ static int virtblk_add_req_scsi(struct virtqueue *vq, struct virtblk_req *vbr,
return virtqueue_add_sgs(vq, sgs, num_out, num_in, vbr, GFP_ATOMIC);
}
-static inline void virtblk_scsi_reques_done(struct request *req)
+static inline void virtblk_scsi_request_done(struct request *req)
{
struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
struct virtio_blk *vblk = req->q->queuedata;
@@ -144,7 +144,7 @@ static inline int virtblk_add_req_scsi(struct virtqueue *vq,
{
return -EIO;
}
-static inline void virtblk_scsi_reques_done(struct request *req)
+static inline void virtblk_scsi_request_done(struct request *req)
{
}
#define virtblk_ioctl NULL
@@ -180,7 +180,7 @@ static inline void virtblk_request_done(struct request *req)
switch (req_op(req)) {
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
- virtblk_scsi_reques_done(req);
+ virtblk_scsi_request_done(req);
break;
case REQ_OP_DRV_IN:
req->errors = (error != 0);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/virtio_blk.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index eaf99022bdc6..dbc4e80680b1 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -111,7 +111,7 @@ static int virtblk_add_req_scsi(struct virtqueue *vq, struct virtblk_req *vbr,
return virtqueue_add_sgs(vq, sgs, num_out, num_in, vbr, GFP_ATOMIC);
}
-static inline void virtblk_scsi_reques_done(struct request *req)
+static inline void virtblk_scsi_request_done(struct request *req)
{
struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
struct virtio_blk *vblk = req->q->queuedata;
@@ -144,7 +144,7 @@ static inline int virtblk_add_req_scsi(struct virtqueue *vq,
{
return -EIO;
}
-static inline void virtblk_scsi_reques_done(struct request *req)
+static inline void virtblk_scsi_request_done(struct request *req)
{
}
#define virtblk_ioctl NULL
@@ -180,7 +180,7 @@ static inline void virtblk_request_done(struct request *req)
switch (req_op(req)) {
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
- virtblk_scsi_reques_done(req);
+ virtblk_scsi_request_done(req);
break;
case REQ_OP_DRV_IN:
req->errors = (error != 0);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-06 18:53 ` Johannes Thumshirn
-1 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:53 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:25PM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Fair enough,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
@ 2017-04-06 18:53 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:53 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:25PM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
Fair enough,
Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
--
Johannes Thumshirn Storage
jthumshirn at suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: Felix Imend?rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N?rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
@ 2017-04-06 18:53 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:53 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:25PM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Fair enough,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-13 20:05 ` Bart Van Assche
-1 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:05 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> [ ... ]
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>=
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
@ 2017-04-13 20:05 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:05 UTC (permalink / raw)
On Thu, 2017-04-06@17:39 +0200, Christoph Hellwig wrote:
> [ ... ]
Reviewed-by: Bart Van Assche <Bart.VanAssche at sandisk.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 06/25] virtio: fix spelling of virtblk_scsi_request_done
@ 2017-04-13 20:05 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:05 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> [ ... ]
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 07/25] virtio_blk: don't use req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Remove passing req->errors (which at that point is always 0) to
blk_mq_complete_requestq, and rely on the virtio status code for the
serial number passthrough request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/virtio_blk.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index dbc4e80680b1..8378ad480f77 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -175,19 +175,15 @@ static int virtblk_add_req(struct virtqueue *vq, struct virtblk_req *vbr,
static inline void virtblk_request_done(struct request *req)
{
struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
- int error = virtblk_result(vbr);
switch (req_op(req)) {
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
virtblk_scsi_request_done(req);
break;
- case REQ_OP_DRV_IN:
- req->errors = (error != 0);
- break;
}
- blk_mq_end_request(req, error);
+ blk_mq_end_request(req, virtblk_result(vbr));
}
static void virtblk_done(struct virtqueue *vq)
@@ -205,7 +201,7 @@ static void virtblk_done(struct virtqueue *vq)
while ((vbr = virtqueue_get_buf(vblk->vqs[qid].vq, &len)) != NULL) {
struct request *req = blk_mq_rq_from_pdu(vbr);
- blk_mq_complete_request(req, req->errors);
+ blk_mq_complete_request(req, 0);
req_done = true;
}
if (unlikely(virtqueue_is_broken(vq)))
@@ -311,7 +307,7 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
goto out;
blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
- err = req->errors ? -EIO : 0;
+ err = virtblk_result(blk_mq_rq_to_pdu(req));
out:
blk_put_request(req);
return err;
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 07/25] virtio_blk: don't use req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Remove passing req->errors (which at that point is always 0) to
blk_mq_complete_requestq, and rely on the virtio status code for the
serial number passthrough request.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/virtio_blk.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index dbc4e80680b1..8378ad480f77 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -175,19 +175,15 @@ static int virtblk_add_req(struct virtqueue *vq, struct virtblk_req *vbr,
static inline void virtblk_request_done(struct request *req)
{
struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
- int error = virtblk_result(vbr);
switch (req_op(req)) {
case REQ_OP_SCSI_IN:
case REQ_OP_SCSI_OUT:
virtblk_scsi_request_done(req);
break;
- case REQ_OP_DRV_IN:
- req->errors = (error != 0);
- break;
}
- blk_mq_end_request(req, error);
+ blk_mq_end_request(req, virtblk_result(vbr));
}
static void virtblk_done(struct virtqueue *vq)
@@ -205,7 +201,7 @@ static void virtblk_done(struct virtqueue *vq)
while ((vbr = virtqueue_get_buf(vblk->vqs[qid].vq, &len)) != NULL) {
struct request *req = blk_mq_rq_from_pdu(vbr);
- blk_mq_complete_request(req, req->errors);
+ blk_mq_complete_request(req, 0);
req_done = true;
}
if (unlikely(virtqueue_is_broken(vq)))
@@ -311,7 +307,7 @@ static int virtblk_get_id(struct gendisk *disk, char *id_str)
goto out;
blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
- err = req->errors ? -EIO : 0;
+ err = virtblk_result(blk_mq_rq_to_pdu(req));
out:
blk_put_request(req);
return err;
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 07/25] virtio_blk: don't use req->errors
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-06 18:55 ` Johannes Thumshirn
-1 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:55 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:26PM +0200, Christoph Hellwig wrote:
> Remove passing req->errors (which at that point is always 0) to
> blk_mq_complete_requestq, and rely on the virtio status code for the
blk_mq_complete_request ^
> serial number passthrough request.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Otherwise looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 07/25] virtio_blk: don't use req->errors
@ 2017-04-06 18:55 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:55 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:26PM +0200, Christoph Hellwig wrote:
> Remove passing req->errors (which at that point is always 0) to
> blk_mq_complete_requestq, and rely on the virtio status code for the
blk_mq_complete_request ^
> serial number passthrough request.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
Otherwise looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn at suse.de>
--
Johannes Thumshirn Storage
jthumshirn at suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: Felix Imend?rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N?rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 07/25] virtio_blk: don't use req->errors
@ 2017-04-06 18:55 ` Johannes Thumshirn
0 siblings, 0 replies; 115+ messages in thread
From: Johannes Thumshirn @ 2017-04-06 18:55 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, linux-scsi, Konrad Rzeszutek Wilk, Josef Bacik,
James Smart, linux-nvme, linux-block, dm-devel,
Roger Pau Monné
On Thu, Apr 06, 2017 at 05:39:26PM +0200, Christoph Hellwig wrote:
> Remove passing req->errors (which at that point is always 0) to
> blk_mq_complete_requestq, and rely on the virtio status code for the
blk_mq_complete_request ^
> serial number passthrough request.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Otherwise looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 08/25] scsi: fix fast-fail for non-passthrough requests
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Currently error is always 0 for non-passthrough requests when reaching the
scsi_noretry_cmd check in scsi_io_completion, which effectively disables
all fastfail logic. Fix this by having a single call to
__scsi_error_from_host_byte at the beginning of the function and always
having a valid error value.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/scsi/scsi_lib.c | 28 +++++++---------------------
1 file changed, 7 insertions(+), 21 deletions(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 11972d1075f1..89b4d9e69866 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -779,21 +779,17 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
sense_valid = scsi_command_normalize_sense(cmd, &sshdr);
if (sense_valid)
sense_deferred = scsi_sense_is_deferred(&sshdr);
+
+ if (!sense_deferred)
+ error = __scsi_error_from_host_byte(cmd, result);
}
if (blk_rq_is_passthrough(req)) {
- if (result) {
- if (sense_valid) {
- /*
- * SG_IO wants current and deferred errors
- */
- scsi_req(req)->sense_len =
- min(8 + cmd->sense_buffer[7],
- SCSI_SENSE_BUFFERSIZE);
- }
- if (!sense_deferred)
- error = __scsi_error_from_host_byte(cmd, result);
+ if (result && sense_valid) {
+ scsi_req(req)->sense_len = min(8 + cmd->sense_buffer[7],
+ SCSI_SENSE_BUFFERSIZE);
}
+
/*
* __scsi_error_from_host_byte may have reset the host_byte
*/
@@ -812,13 +808,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
BUG();
return;
}
- } else if (blk_rq_bytes(req) == 0 && result && !sense_deferred) {
- /*
- * Flush commands do not transfers any data, and thus cannot use
- * good_bytes != blk_rq_bytes(req) as the signal for an error.
- * This sets the error explicitly for the problem case.
- */
- error = __scsi_error_from_host_byte(cmd, result);
}
/* no bidi support for !blk_rq_is_passthrough yet */
@@ -848,7 +837,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
else if (!(req->rq_flags & RQF_QUIET))
scsi_print_sense(cmd);
result = 0;
- /* for passthrough error may be set */
error = 0;
}
@@ -877,8 +865,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
if (result == 0)
goto requeue;
- error = __scsi_error_from_host_byte(cmd, result);
-
if (host_byte(result) == DID_RESET) {
/* Third party bus reset or reset for error recovery
* reasons. Just retry the command and see what
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 08/25] scsi: fix fast-fail for non-passthrough requests
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Currently error is always 0 for non-passthrough requests when reaching the
scsi_noretry_cmd check in scsi_io_completion, which effectively disables
all fastfail logic. Fix this by having a single call to
__scsi_error_from_host_byte at the beginning of the function and always
having a valid error value.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/scsi/scsi_lib.c | 28 +++++++---------------------
1 file changed, 7 insertions(+), 21 deletions(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 11972d1075f1..89b4d9e69866 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -779,21 +779,17 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
sense_valid = scsi_command_normalize_sense(cmd, &sshdr);
if (sense_valid)
sense_deferred = scsi_sense_is_deferred(&sshdr);
+
+ if (!sense_deferred)
+ error = __scsi_error_from_host_byte(cmd, result);
}
if (blk_rq_is_passthrough(req)) {
- if (result) {
- if (sense_valid) {
- /*
- * SG_IO wants current and deferred errors
- */
- scsi_req(req)->sense_len =
- min(8 + cmd->sense_buffer[7],
- SCSI_SENSE_BUFFERSIZE);
- }
- if (!sense_deferred)
- error = __scsi_error_from_host_byte(cmd, result);
+ if (result && sense_valid) {
+ scsi_req(req)->sense_len = min(8 + cmd->sense_buffer[7],
+ SCSI_SENSE_BUFFERSIZE);
}
+
/*
* __scsi_error_from_host_byte may have reset the host_byte
*/
@@ -812,13 +808,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
BUG();
return;
}
- } else if (blk_rq_bytes(req) == 0 && result && !sense_deferred) {
- /*
- * Flush commands do not transfers any data, and thus cannot use
- * good_bytes != blk_rq_bytes(req) as the signal for an error.
- * This sets the error explicitly for the problem case.
- */
- error = __scsi_error_from_host_byte(cmd, result);
}
/* no bidi support for !blk_rq_is_passthrough yet */
@@ -848,7 +837,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
else if (!(req->rq_flags & RQF_QUIET))
scsi_print_sense(cmd);
result = 0;
- /* for passthrough error may be set */
error = 0;
}
@@ -877,8 +865,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
if (result == 0)
goto requeue;
- error = __scsi_error_from_host_byte(cmd, result);
-
if (host_byte(result) == DID_RESET) {
/* Third party bus reset or reset for error recovery
* reasons. Just retry the command and see what
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 08/25] scsi: fix fast-fail for non-passthrough requests
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-13 20:41 ` Bart Van Assche
-1 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:41 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> Currently error is always 0 for non-passthrough requests when reaching th=
e
> scsi_noretry_cmd check in scsi_io_completion, which effectively disables
> all fastfail logic. Fix this by having a single call to
> __scsi_error_from_host_byte at the beginning of the function and always
> having a valid error value.
>=20
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/scsi/scsi_lib.c | 28 +++++++---------------------
> 1 file changed, 7 insertions(+), 21 deletions(-)
>=20
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index 11972d1075f1..89b4d9e69866 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -779,21 +779,17 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsi=
gned int good_bytes)
> sense_valid =3D scsi_command_normalize_sense(cmd, &sshdr);
> if (sense_valid)
> sense_deferred =3D scsi_sense_is_deferred(&sshdr);
> +
> + if (!sense_deferred)
> + error =3D __scsi_error_from_host_byte(cmd, result);
> }
Hello Christoph,
Sorry but this doesn't look correct to me. Further down a "error =3D
__scsi_error_from_host_byte(cmd, result)" statement is removed that does no=
t
depend on "if (!sense_deferred)" so I think that assignment should happen
independent of the value of "sense_deferred". Additionally, how can it make
sense to call __scsi_error_from_host_byte() only if sense_deferred =3D=3D f=
alse?
As you know the SCSI command result is generated by the LLD so I don't thin=
k
that it depends on whether or not the sense data has been deferred.
Bart.=
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 08/25] scsi: fix fast-fail for non-passthrough requests
@ 2017-04-13 20:41 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:41 UTC (permalink / raw)
On Thu, 2017-04-06@17:39 +0200, Christoph Hellwig wrote:
> Currently error is always 0 for non-passthrough requests when reaching the
> scsi_noretry_cmd check in scsi_io_completion, which effectively disables
> all fastfail logic. Fix this by having a single call to
> __scsi_error_from_host_byte at the beginning of the function and always
> having a valid error value.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
> drivers/scsi/scsi_lib.c | 28 +++++++---------------------
> 1 file changed, 7 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index 11972d1075f1..89b4d9e69866 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -779,21 +779,17 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
> sense_valid = scsi_command_normalize_sense(cmd, &sshdr);
> if (sense_valid)
> sense_deferred = scsi_sense_is_deferred(&sshdr);
> +
> + if (!sense_deferred)
> + error = __scsi_error_from_host_byte(cmd, result);
> }
Hello Christoph,
Sorry but this doesn't look correct to me. Further down a "error =
__scsi_error_from_host_byte(cmd, result)" statement is removed that does not
depend on "if (!sense_deferred)" so I think that assignment should happen
independent of the value of "sense_deferred". Additionally, how can it make
sense to call __scsi_error_from_host_byte() only if sense_deferred == false?
As you know the SCSI command result is generated by the LLD so I don't think
that it depends on whether or not the sense data has been deferred.
Bart.
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 08/25] scsi: fix fast-fail for non-passthrough requests
@ 2017-04-13 20:41 ` Bart Van Assche
0 siblings, 0 replies; 115+ messages in thread
From: Bart Van Assche @ 2017-04-13 20:41 UTC (permalink / raw)
To: hch, axboe
Cc: linux-block, konrad.wilk, roger.pau, linux-scsi, linux-nvme,
jbacik, james.smart, dm-devel
On Thu, 2017-04-06 at 17:39 +0200, Christoph Hellwig wrote:
> Currently error is always 0 for non-passthrough requests when reaching the
> scsi_noretry_cmd check in scsi_io_completion, which effectively disables
> all fastfail logic. Fix this by having a single call to
> __scsi_error_from_host_byte at the beginning of the function and always
> having a valid error value.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/scsi/scsi_lib.c | 28 +++++++---------------------
> 1 file changed, 7 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index 11972d1075f1..89b4d9e69866 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -779,21 +779,17 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
> sense_valid = scsi_command_normalize_sense(cmd, &sshdr);
> if (sense_valid)
> sense_deferred = scsi_sense_is_deferred(&sshdr);
> +
> + if (!sense_deferred)
> + error = __scsi_error_from_host_byte(cmd, result);
> }
Hello Christoph,
Sorry but this doesn't look correct to me. Further down a "error =
__scsi_error_from_host_byte(cmd, result)" statement is removed that does not
depend on "if (!sense_deferred)" so I think that assignment should happen
independent of the value of "sense_deferred". Additionally, how can it make
sense to call __scsi_error_from_host_byte() only if sense_deferred == false?
As you know the SCSI command result is generated by the LLD so I don't think
that it depends on whether or not the sense data has been deferred.
Bart.
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 09/25] scsi: introduce a new result field in struct scsi_request
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
This passes on the scsi_cmnd result field to users of passthrough
requests. Currently we abuse req->errors for this purpose, but that
field will go away in its current form.
Note that the old IDE code abuses the errors field in very creative
ways and stores all kinds of different values in it. I didn't dare
to touch this magic, so the abuses are brought forward 1:1.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/bsg-lib.c | 8 ++++----
block/bsg.c | 12 +++++------
block/scsi_ioctl.c | 14 ++++++-------
drivers/block/cciss.c | 42 +++++++++++++++++++-------------------
drivers/block/pktcdvd.c | 2 +-
drivers/block/virtio_blk.c | 2 +-
drivers/cdrom/cdrom.c | 2 +-
drivers/ide/ide-atapi.c | 10 ++++-----
drivers/ide/ide-cd.c | 20 +++++++++---------
drivers/ide/ide-cd_ioctl.c | 2 +-
drivers/ide/ide-devsets.c | 4 ++--
drivers/ide/ide-dma.c | 2 +-
drivers/ide/ide-eh.c | 36 ++++++++++++++++----------------
drivers/ide/ide-floppy.c | 10 ++++-----
drivers/ide/ide-io.c | 10 ++++-----
drivers/ide/ide-ioctls.c | 4 ++--
drivers/ide/ide-park.c | 2 +-
drivers/ide/ide-pm.c | 8 ++++----
drivers/ide/ide-tape.c | 4 ++--
drivers/ide/ide-taskfile.c | 6 +++---
drivers/scsi/osd/osd_initiator.c | 2 +-
drivers/scsi/osst.c | 2 +-
drivers/scsi/qla2xxx/qla_bsg.c | 6 +++---
drivers/scsi/scsi_lib.c | 18 +++++++---------
drivers/scsi/scsi_transport_sas.c | 2 +-
drivers/scsi/sg.c | 2 +-
drivers/scsi/st.c | 6 +++---
drivers/target/target_core_pscsi.c | 2 +-
fs/nfsd/blocklayout.c | 4 ++--
include/linux/ide.h | 2 +-
include/scsi/scsi_request.h | 1 +
31 files changed, 122 insertions(+), 125 deletions(-)
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index cd15f9dbb147..0a23dbba2d30 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -37,7 +37,7 @@ static void bsg_destroy_job(struct kref *kref)
struct bsg_job *job = container_of(kref, struct bsg_job, kref);
struct request *rq = job->req;
- blk_end_request_all(rq, rq->errors);
+ blk_end_request_all(rq, scsi_req(rq)->result);
put_device(job->dev); /* release reference for the request */
@@ -74,7 +74,7 @@ void bsg_job_done(struct bsg_job *job, int result,
struct scsi_request *rq = scsi_req(req);
int err;
- err = job->req->errors = result;
+ err = scsi_req(job->req)->result = result;
if (err < 0)
/* we're only returning the result field in the reply */
rq->sense_len = sizeof(u32);
@@ -177,7 +177,7 @@ static int bsg_create_job(struct device *dev, struct request *req)
* @q: request queue to manage
*
* On error the create_bsg_job function should return a -Exyz error value
- * that will be set to the req->errors.
+ * that will be set to ->result.
*
* Drivers/subsys should pass this to the queue init function.
*/
@@ -201,7 +201,7 @@ static void bsg_request_fn(struct request_queue *q)
ret = bsg_create_job(dev, req);
if (ret) {
- req->errors = ret;
+ scsi_req(req)->result = ret;
blk_end_request_all(req, ret);
spin_lock_irq(q->queue_lock);
continue;
diff --git a/block/bsg.c b/block/bsg.c
index 74835dbf0c47..e54daf9f2ee0 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -391,13 +391,13 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
struct scsi_request *req = scsi_req(rq);
int ret = 0;
- dprintk("rq %p bio %p 0x%x\n", rq, bio, rq->errors);
+ dprintk("rq %p bio %p 0x%x\n", rq, bio, rq->result);
/*
* fill in all the output members
*/
- hdr->device_status = rq->errors & 0xff;
- hdr->transport_status = host_byte(rq->errors);
- hdr->driver_status = driver_byte(rq->errors);
+ hdr->device_status = req->result & 0xff;
+ hdr->transport_status = host_byte(req->result);
+ hdr->driver_status = driver_byte(req->result);
hdr->info = 0;
if (hdr->device_status || hdr->transport_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
@@ -431,8 +431,8 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
* just a protocol response (i.e. non negative), that gets
* processed above.
*/
- if (!ret && rq->errors < 0)
- ret = rq->errors;
+ if (!ret && req->result < 0)
+ ret = req->result;
blk_rq_unmap_user(bio);
scsi_req_free_cmd(req);
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index b1352143f12f..4a294a5f7fab 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -262,11 +262,11 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
/*
* fill in all the output members
*/
- hdr->status = rq->errors & 0xff;
- hdr->masked_status = status_byte(rq->errors);
- hdr->msg_status = msg_byte(rq->errors);
- hdr->host_status = host_byte(rq->errors);
- hdr->driver_status = driver_byte(rq->errors);
+ hdr->status = req->result & 0xff;
+ hdr->masked_status = status_byte(req->result);
+ hdr->msg_status = msg_byte(req->result);
+ hdr->host_status = host_byte(req->result);
+ hdr->driver_status = driver_byte(req->result);
hdr->info = 0;
if (hdr->masked_status || hdr->host_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
@@ -509,7 +509,7 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
blk_execute_rq(q, disk, rq, 0);
- err = rq->errors & 0xff; /* only 8 bit SCSI status */
+ err = req->result & 0xff; /* only 8 bit SCSI status */
if (err) {
if (req->sense_len && req->sense) {
bytes = (OMAX_SB_LEN > req->sense_len) ?
@@ -548,7 +548,7 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
scsi_req(rq)->cmd[4] = data;
scsi_req(rq)->cmd_len = 6;
blk_execute_rq(q, bd_disk, rq, 0);
- err = rq->errors ? -EIO : 0;
+ err = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
return err;
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 8e1a4554951c..cd375503f7b0 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1864,8 +1864,7 @@ static void cciss_softirq_done(struct request *rq)
/* set the residual count for pc requests */
if (blk_rq_is_passthrough(rq))
scsi_req(rq)->resid_len = c->err_info->ResidualCnt;
-
- blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
+ blk_end_request_all(rq, scsi_req(rq)->result ? -EIO : 0);
spin_lock_irqsave(&h->lock, flags);
cmd_free(h, c);
@@ -3140,18 +3139,19 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
{
int retry_cmd = 0;
struct request *rq = cmd->rq;
+ struct scsi_request *sreq = scsi_req(rq);
- rq->errors = 0;
+ sreq->result = 0;
if (timeout)
- rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
+ sreq->result = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
goto after_error_processing;
switch (cmd->err_info->CommandStatus) {
case CMD_TARGET_STATUS:
- rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
+ sreq->result = evaluate_target_status(h, cmd, &retry_cmd);
break;
case CMD_DATA_UNDERRUN:
if (!blk_rq_is_passthrough(cmd->rq)) {
@@ -3169,7 +3169,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_INVALID:
dev_warn(&h->pdev->dev, "cciss: cmd %p is "
"reported invalid\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3177,7 +3177,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_PROTOCOL_ERR:
dev_warn(&h->pdev->dev, "cciss: cmd %p has "
"protocol error\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3185,7 +3185,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_HARDWARE_ERR:
dev_warn(&h->pdev->dev, "cciss: cmd %p had "
" hardware error\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3193,7 +3193,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_CONNECTION_LOST:
dev_warn(&h->pdev->dev, "cciss: cmd %p had "
"connection lost\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3201,7 +3201,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_ABORTED:
dev_warn(&h->pdev->dev, "cciss: cmd %p was "
"aborted\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ABORT);
@@ -3209,7 +3209,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_ABORT_FAILED:
dev_warn(&h->pdev->dev, "cciss: cmd %p reports "
"abort failed\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3224,21 +3224,21 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
} else
dev_warn(&h->pdev->dev,
"%p retried too many times\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ABORT);
break;
case CMD_TIMEOUT:
dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_UNABORTABLE:
dev_warn(&h->pdev->dev, "cmd %p unabortable\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3247,7 +3247,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
dev_warn(&h->pdev->dev, "cmd %p returned "
"unknown status %x\n", cmd,
cmd->err_info->CommandStatus);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3380,9 +3380,9 @@ static void do_cciss_request(struct request_queue *q)
if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
dev_warn(&h->pdev->dev,
"%s: error mapping page for DMA\n", __func__);
- creq->errors = make_status_bytes(SAM_STAT_GOOD,
- 0, DRIVER_OK,
- DID_SOFT_ERROR);
+ scsi_req(creq)->result =
+ make_status_bytes(SAM_STAT_GOOD, 0, DRIVER_OK,
+ DID_SOFT_ERROR);
cmd_free(h, c);
return;
}
@@ -3395,9 +3395,9 @@ static void do_cciss_request(struct request_queue *q)
if (cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
(seg - (h->max_cmd_sgentries - 1)) *
sizeof(SGDescriptor_struct))) {
- creq->errors = make_status_bytes(SAM_STAT_GOOD,
- 0, DRIVER_OK,
- DID_SOFT_ERROR);
+ scsi_req(creq)->result =
+ make_status_bytes(SAM_STAT_GOOD, 0, DRIVER_OK,
+ DID_SOFT_ERROR);
cmd_free(h, c);
return;
}
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 66d846ba85a9..205b865ebeb9 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -724,7 +724,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
rq->rq_flags |= RQF_QUIET;
blk_execute_rq(rq->q, pd->bdev->bd_disk, rq, 0);
- if (rq->errors)
+ if (scsi_req(rq)->result)
ret = -EIO;
out:
blk_put_request(rq);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 8378ad480f77..dea2a58d6734 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -119,7 +119,7 @@ static inline void virtblk_scsi_request_done(struct request *req)
sreq->resid_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.residual);
sreq->sense_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.sense_len);
- req->errors = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.errors);
+ sreq->result = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.errors);
}
static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 308501730ab3..76c952fd9ab9 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2219,7 +2219,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
bio = rq->bio;
blk_execute_rq(q, cdi->disk, rq, 0);
- if (rq->errors) {
+ if (scsi_req(rq)->result) {
struct request_sense *s = req->sense;
ret = -EIO;
cdi->last_sense = s->sense_key;
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 1524797e1776..5901937284e7 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -108,7 +108,7 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
if (drive->media == ide_tape)
scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1;
blk_execute_rq(drive->queue, disk, rq, 0);
- error = rq->errors ? -EIO : 0;
+ error = scsi_req(rq)->result ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
@@ -455,7 +455,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
debug_log("%s: I/O error\n", drive->name);
if (drive->media != ide_tape)
- pc->rq->errors++;
+ scsi_req(pc->rq)->result++;
if (scsi_req(rq)->cmd[0] == REQUEST_SENSE) {
printk(KERN_ERR PFX "%s: I/O error in request "
@@ -489,13 +489,13 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
drive->failed_pc = NULL;
if (ata_misc_request(rq)) {
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
error = 0;
} else {
if (blk_rq_is_passthrough(rq) && uptodate <= 0) {
- if (rq->errors == 0)
- rq->errors = -EIO;
+ if (scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
}
error = uptodate ? 0 : -EIO;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 95c40afa9120..07e5ff3a64c3 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -247,10 +247,10 @@ static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
struct cdrom_info *info = drive->driver_data;
- if (!rq->errors)
+ if (!scsi_req(rq)->result)
info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
- rq->errors = 1;
+ scsi_req(rq)->result = 1;
if (time_after(jiffies, info->write_timeout))
return 0;
@@ -294,8 +294,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
}
/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
- if (blk_rq_is_scsi(rq) && !rq->errors)
- rq->errors = SAM_STAT_CHECK_CONDITION;
+ if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
+ scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
if (blk_noretry_request(rq))
do_end_request = 1;
@@ -325,7 +325,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
* Arrange to retry the request but be sure to give up if we've
* retried too many times.
*/
- if (++rq->errors > ERROR_MAX)
+ if (++scsi_req(rq)->result > ERROR_MAX)
do_end_request = 1;
break;
case ILLEGAL_REQUEST:
@@ -372,7 +372,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
/* go to the default handler for other errors */
ide_error(drive, "cdrom_decode_status", stat);
return 1;
- } else if (++rq->errors > ERROR_MAX)
+ } else if (++scsi_req(rq)->result > ERROR_MAX)
/* we've racked up too many retries, abort */
do_end_request = 1;
}
@@ -453,7 +453,7 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
}
blk_execute_rq(drive->queue, info->disk, rq, 0);
- error = rq->errors ? -EIO : 0;
+ error = scsi_req(rq)->result ? -EIO : 0;
if (buffer)
*bufflen = scsi_req(rq)->resid_len;
@@ -684,8 +684,8 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
if (cmd->nleft == 0)
uptodate = 1;
} else {
- if (uptodate <= 0 && rq->errors == 0)
- rq->errors = -EIO;
+ if (uptodate <= 0 && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
}
if (uptodate == 0 && rq->bio)
@@ -1380,7 +1380,7 @@ static int ide_cdrom_prep_pc(struct request *rq)
* appropriate action
*/
if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
- rq->errors = ILLEGAL_REQUEST;
+ scsi_req(rq)->result = ILLEGAL_REQUEST;
return BLKPREP_KILL;
}
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index f1ab726bd430..55cd736c39c6 100644
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -308,7 +308,7 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
ide_req(rq)->type = ATA_PRIV_MISC;
rq->rq_flags = RQF_QUIET;
blk_execute_rq(drive->queue, cd->disk, rq, 0);
- ret = rq->errors ? -EIO : 0;
+ ret = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
/*
* A reset will unlock the door. If it was previously locked,
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
index eea6a7cb80b5..b1223234037d 100644
--- a/drivers/ide/ide-devsets.c
+++ b/drivers/ide/ide-devsets.c
@@ -174,7 +174,7 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
rq->special = setting->set;
blk_execute_rq(q, NULL, rq, 0);
- ret = rq->errors;
+ ret = scsi_req(rq)->result;
blk_put_request(rq);
return ret;
@@ -186,7 +186,7 @@ ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
err = setfunc(drive, *(int *)&scsi_req(rq)->cmd[1]);
if (err)
- rq->errors = err;
+ scsi_req(rq)->result = err;
ide_complete_rq(drive, err, blk_rq_bytes(rq));
return ide_stopped;
}
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 17a65ac56491..51c81223e56d 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -490,7 +490,7 @@ ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
* make sure request is sane
*/
if (hwif->rq)
- hwif->rq->errors = 0;
+ scsi_req(hwif->rq)->result = 0;
return ret;
}
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
index cf3af6840368..4b7ffd7d158d 100644
--- a/drivers/ide/ide-eh.c
+++ b/drivers/ide/ide-eh.c
@@ -12,7 +12,7 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
if ((stat & ATA_BUSY) ||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
/* other bits are useless when BUSY */
- rq->errors |= ERROR_RESET;
+ scsi_req(rq)->result |= ERROR_RESET;
} else if (stat & ATA_ERR) {
/* err has different meaning on cdrom and tape */
if (err == ATA_ABORTED) {
@@ -25,10 +25,10 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
drive->crc_count++;
} else if (err & (ATA_BBK | ATA_UNC)) {
/* retries won't help these */
- rq->errors = ERROR_MAX;
+ scsi_req(rq)->result = ERROR_MAX;
} else if (err & ATA_TRK0NF) {
/* help it find track zero */
- rq->errors |= ERROR_RECAL;
+ scsi_req(rq)->result |= ERROR_RECAL;
}
}
@@ -39,23 +39,23 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
}
- if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {
+ if (scsi_req(rq)->result >= ERROR_MAX || blk_noretry_request(rq)) {
ide_kill_rq(drive, rq);
return ide_stopped;
}
if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
- rq->errors |= ERROR_RESET;
+ scsi_req(rq)->result |= ERROR_RESET;
- if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
- ++rq->errors;
+ if ((scsi_req(rq)->result & ERROR_RESET) == ERROR_RESET) {
+ ++scsi_req(rq)->result;
return ide_do_reset(drive);
}
- if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
+ if ((scsi_req(rq)->result & ERROR_RECAL) == ERROR_RECAL)
drive->special_flags |= IDE_SFLAG_RECALIBRATE;
- ++rq->errors;
+ ++scsi_req(rq)->result;
return ide_stopped;
}
@@ -68,7 +68,7 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq,
if ((stat & ATA_BUSY) ||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
/* other bits are useless when BUSY */
- rq->errors |= ERROR_RESET;
+ scsi_req(rq)->result |= ERROR_RESET;
} else {
/* add decoding error stuff */
}
@@ -77,14 +77,14 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq,
/* force an abort */
hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
- if (rq->errors >= ERROR_MAX) {
+ if (scsi_req(rq)->result >= ERROR_MAX) {
ide_kill_rq(drive, rq);
} else {
- if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
- ++rq->errors;
+ if ((scsi_req(rq)->result & ERROR_RESET) == ERROR_RESET) {
+ ++scsi_req(rq)->result;
return ide_do_reset(drive);
}
- ++rq->errors;
+ ++scsi_req(rq)->result;
}
return ide_stopped;
@@ -130,11 +130,11 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
if (cmd)
ide_complete_cmd(drive, cmd, stat, err);
} else if (ata_pm_request(rq)) {
- rq->errors = 1;
+ scsi_req(rq)->result = 1;
ide_complete_pm_rq(drive, rq);
return ide_stopped;
}
- rq->errors = err;
+ scsi_req(rq)->result = err;
ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
return ide_stopped;
}
@@ -149,8 +149,8 @@ static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
if (rq && ata_misc_request(rq) &&
scsi_req(rq)->cmd[0] == REQ_DRIVE_RESET) {
- if (err <= 0 && rq->errors == 0)
- rq->errors = -EIO;
+ if (err <= 0 && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
ide_complete_rq(drive, err ? err : 0, blk_rq_bytes(rq));
}
}
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index a69e8013f1df..8ac6048cd2df 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -98,7 +98,7 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
}
if (ata_misc_request(rq))
- rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
+ scsi_req(rq)->result = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
return uptodate;
}
@@ -239,7 +239,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
? rq->rq_disk->disk_name
: "dev?"));
- if (rq->errors >= ERROR_MAX) {
+ if (scsi_req(rq)->result >= ERROR_MAX) {
if (drive->failed_pc) {
ide_floppy_report_error(floppy, drive->failed_pc);
drive->failed_pc = NULL;
@@ -247,7 +247,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
if (ata_misc_request(rq)) {
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
return ide_stopped;
} else
@@ -301,8 +301,8 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
return ide_floppy_issue_pc(drive, &cmd, pc);
out_end:
drive->failed_pc = NULL;
- if (blk_rq_is_passthrough(rq) && rq->errors == 0)
- rq->errors = -EIO;
+ if (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
return ide_stopped;
}
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 043b1fb963cb..45b3f41a43d4 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -141,12 +141,12 @@ void ide_kill_rq(ide_drive_t *drive, struct request *rq)
drive->failed_pc = NULL;
if ((media == ide_floppy || media == ide_tape) && drv_req) {
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
} else {
if (media == ide_tape)
- rq->errors = IDE_DRV_ERROR_GENERAL;
- else if (blk_rq_is_passthrough(rq) && rq->errors == 0)
- rq->errors = -EIO;
+ scsi_req(rq)->result = IDE_DRV_ERROR_GENERAL;
+ else if (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
}
ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
@@ -271,7 +271,7 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
#ifdef DEBUG
printk("%s: DRIVE_CMD (null)\n", drive->name);
#endif
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
return ide_stopped;
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
index 3e96e531b367..8c0d17297a7a 100644
--- a/drivers/ide/ide-ioctls.c
+++ b/drivers/ide/ide-ioctls.c
@@ -129,7 +129,7 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
blk_execute_rq(drive->queue, NULL, rq, 0);
- err = rq->errors ? -EIO : 0;
+ err = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
return err;
@@ -229,7 +229,7 @@ static int generic_drive_reset(ide_drive_t *drive)
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
blk_execute_rq(drive->queue, NULL, rq, 1);
- ret = rq->errors;
+ ret = scsi_req(rq)->result;
blk_put_request(rq);
return ret;
}
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
index b4f577016f5a..94e3107f59b9 100644
--- a/drivers/ide/ide-park.c
+++ b/drivers/ide/ide-park.c
@@ -38,7 +38,7 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = &timeout;
blk_execute_rq(q, NULL, rq, 1);
- rc = rq->errors ? -EIO : 0;
+ rc = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
if (rc)
goto out;
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index bf513f886f3c..277c2bb7616f 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -28,7 +28,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
rqpm.pm_state = mesg.event;
blk_execute_rq(drive->queue, NULL, rq, 0);
- ret = rq->errors ? -EIO : 0;
+ ret = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
if (ret == 0 && ide_port_acpi(hwif)) {
@@ -56,8 +56,8 @@ static int ide_pm_execute_rq(struct request *rq)
spin_lock_irq(q->queue_lock);
if (unlikely(blk_queue_dying(q))) {
rq->rq_flags |= RQF_QUIET;
- rq->errors = -ENXIO;
- __blk_end_request_all(rq, rq->errors);
+ scsi_req(rq)->result = -ENXIO;
+ __blk_end_request_all(rq, scsi_req(rq)->result);
spin_unlock_irq(q->queue_lock);
return -ENXIO;
}
@@ -67,7 +67,7 @@ static int ide_pm_execute_rq(struct request *rq)
wait_for_completion_io(&wait);
- return rq->errors ? -EIO : 0;
+ return scsi_req(rq)->result ? -EIO : 0;
}
int generic_ide_resume(struct device *dev)
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index d8a552b47718..a0651f948b76 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -366,7 +366,7 @@ static int ide_tape_callback(ide_drive_t *drive, int dsc)
err = pc->error;
}
}
- rq->errors = err;
+ scsi_req(rq)->result = err;
return uptodate;
}
@@ -879,7 +879,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
tape->valid = 0;
ret = size;
- if (rq->errors == IDE_DRV_ERROR_GENERAL)
+ if (scsi_req(rq)->result == IDE_DRV_ERROR_GENERAL)
ret = -EIO;
out_put:
blk_put_request(rq);
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 78924c7c9478..d71199d23c9e 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -287,7 +287,7 @@ static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
u8 saved_io_32bit = drive->io_32bit;
if (cmd->tf_flags & IDE_TFLAG_FS)
- cmd->rq->errors = 0;
+ scsi_req(cmd->rq)->result = 0;
if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
drive->io_32bit = 0;
@@ -329,7 +329,7 @@ void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
ide_complete_cmd(drive, cmd, stat, err);
- rq->errors = err;
+ scsi_req(rq)->result = err;
if (err == 0 && set_xfer) {
ide_set_xfer_rate(drive, nsect);
@@ -453,7 +453,7 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
cmd->rq = rq;
blk_execute_rq(drive->queue, NULL, rq, 0);
- error = rq->errors ? -EIO : 0;
+ error = scsi_req(rq)->result ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 44e03c3eb250..8d6e2859d9f9 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -477,7 +477,7 @@ static void _set_error_resid(struct osd_request *or, struct request *req,
int error)
{
or->async_error = error;
- or->req_errors = req->errors ? : error;
+ or->req_errors = scsi_req(req)->result ? : error;
or->sense_len = scsi_req(req)->sense_len;
if (or->sense_len)
memcpy(or->sense, scsi_req(req)->sense, or->sense_len);
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 41bc1d64bf86..67cbed92f07d 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -327,7 +327,7 @@ static void osst_end_async(struct request *req, int update)
struct osst_tape *STp = SRpnt->stp;
struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data;
- STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors;
+ STp->buffer->cmdstat.midlevel_result = SRpnt->result = rq->result;
#if DEBUG
STp->write_pending = 0;
#endif
diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 84c9098cc089..b6e40fd4c3c1 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -2553,13 +2553,13 @@ qla24xx_bsg_timeout(struct bsg_job *bsg_job)
ql_log(ql_log_warn, vha, 0x7089,
"mbx abort_command "
"failed.\n");
- bsg_job->req->errors =
+ scsi_req(bsg_job->req)->result =
bsg_reply->result = -EIO;
} else {
ql_dbg(ql_dbg_user, vha, 0x708a,
"mbx abort_command "
"success.\n");
- bsg_job->req->errors =
+ scsi_req(bsg_job->req)->result =
bsg_reply->result = 0;
}
spin_lock_irqsave(&ha->hardware_lock, flags);
@@ -2570,7 +2570,7 @@ qla24xx_bsg_timeout(struct bsg_job *bsg_job)
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ql_log(ql_log_info, vha, 0x708b, "SRB not found to abort.\n");
- bsg_job->req->errors = bsg_reply->result = -ENXIO;
+ scsi_req(bsg_job->req)->result = bsg_reply->result = -ENXIO;
return 0;
done:
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 89b4d9e69866..8c7652f04900 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -229,8 +229,8 @@ void scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
* @rq_flags: flags for ->rq_flags
* @resid: optional residual length
*
- * returns the req->errors value which is the scsi_cmnd result
- * field.
+ * Returns the scsi_cmnd result field if a command was executed, or a negative
+ * Linux error code if we didn't get that war.
*/
int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
@@ -281,7 +281,7 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
memcpy(sense, rq->sense, SCSI_SENSE_BUFFERSIZE);
if (sshdr)
scsi_normalize_sense(rq->sense, rq->sense_len, sshdr);
- ret = req->errors;
+ ret = rq->result;
out:
blk_put_request(req);
@@ -790,11 +790,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
SCSI_SENSE_BUFFERSIZE);
}
- /*
- * __scsi_error_from_host_byte may have reset the host_byte
- */
- req->errors = cmd->result;
-
+ scsi_req(req)->result = cmd->result;
scsi_req(req)->resid_len = scsi_get_resid(cmd);
if (scsi_bidi_cmnd(cmd)) {
@@ -824,7 +820,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
/*
* Recovered errors need reporting, but they're always treated as
* success, so fiddle the result code here. For passthrough requests
- * we already took a copy of the original into rq->errors which
+ * we already took a copy of the original into sreq->result which
* is what gets returned to the user
*/
if (sense_valid && (sshdr.sense_key == RECOVERED_ERROR)) {
@@ -1267,7 +1263,7 @@ scsi_prep_return(struct request_queue *q, struct request *req, int ret)
switch (ret) {
case BLKPREP_KILL:
case BLKPREP_INVALID:
- req->errors = DID_NO_CONNECT << 16;
+ scsi_req(req)->result = DID_NO_CONNECT << 16;
/* release the command and kill it */
if (req->special) {
struct scsi_cmnd *cmd = req->special;
@@ -1891,7 +1887,7 @@ static int scsi_mq_prep_fn(struct request *req)
static void scsi_mq_done(struct scsi_cmnd *cmd)
{
trace_scsi_dispatch_cmd_done(cmd);
- blk_mq_complete_request(cmd->request, cmd->request->errors);
+ blk_mq_complete_request(cmd->request, 0);
}
static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index cdbb293aca08..a2b279737a4b 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -184,7 +184,7 @@ static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
blk_rq_bytes(req->next_rq);
handler = to_sas_internal(shost->transportt)->f->smp_handler;
ret = handler(shost, rphy, req);
- req->errors = ret;
+ scsi_req(req)->result = ret;
blk_end_request_all(req, ret);
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index c5aaceea8d77..504504beaa5e 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1300,7 +1300,7 @@ sg_rq_end_io(struct request *rq, int uptodate)
pr_info("%s: device detaching\n", __func__);
sense = req->sense;
- result = rq->errors;
+ result = req->result;
resid = req->resid_len;
SCSI_LOG_TIMEOUT(4, sg_printk(KERN_INFO, sdp,
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 5408643431bb..1ea34d6f5437 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -480,7 +480,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req)
atomic64_add(ktime_to_ns(now), &STp->stats->tot_write_time);
atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time);
atomic64_inc(&STp->stats->write_cnt);
- if (req->errors) {
+ if (scsi_req(req)->result) {
atomic64_add(atomic_read(&STp->stats->last_write_size)
- STp->buffer->cmdstat.residual,
&STp->stats->write_byte_cnt);
@@ -494,7 +494,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req)
atomic64_add(ktime_to_ns(now), &STp->stats->tot_read_time);
atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time);
atomic64_inc(&STp->stats->read_cnt);
- if (req->errors) {
+ if (scsi_req(req)->result) {
atomic64_add(atomic_read(&STp->stats->last_read_size)
- STp->buffer->cmdstat.residual,
&STp->stats->read_byte_cnt);
@@ -518,7 +518,7 @@ static void st_scsi_execute_end(struct request *req, int uptodate)
struct scsi_tape *STp = SRpnt->stp;
struct bio *tmp;
- STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors;
+ STp->buffer->cmdstat.midlevel_result = SRpnt->result = rq->result;
STp->buffer->cmdstat.residual = rq->resid_len;
st_do_stats(STp, req);
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index c7fa372c527a..a93d94e68ab5 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1050,7 +1050,7 @@ static void pscsi_req_done(struct request *req, int uptodate)
struct se_cmd *cmd = req->end_io_data;
struct pscsi_plugin_task *pt = cmd->priv;
- pt->pscsi_result = req->errors;
+ pt->pscsi_result = scsi_req(req)->result;
pt->pscsi_resid = scsi_req(req)->resid_len;
cmd->scsi_status = status_byte(pt->pscsi_result) << 1;
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 4b72fdf67548..91b72c1560ef 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -243,9 +243,9 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
req->cmd_len = COMMAND_SIZE(INQUIRY);
blk_execute_rq(rq->q, NULL, rq, 1);
- if (rq->errors) {
+ if (req->result) {
pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
- rq->errors);
+ req->result);
goto out_put_request;
}
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 2f51c1724b5a..6980ca322074 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -88,7 +88,7 @@ static inline bool ata_pm_request(struct request *rq)
ide_req(rq)->type == ATA_PRIV_PM_RESUME);
}
-/* Error codes returned in rq->errors to the higher part of the driver. */
+/* Error codes returned in result to the higher part of the driver. */
enum {
IDE_DRV_ERROR_GENERAL = 101,
IDE_DRV_ERROR_FILEMARK = 102,
diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h
index 7c583a0f363a..f0c76f9dc285 100644
--- a/include/scsi/scsi_request.h
+++ b/include/scsi/scsi_request.h
@@ -9,6 +9,7 @@ struct scsi_request {
unsigned char __cmd[BLK_MAX_CDB];
unsigned char *cmd;
unsigned short cmd_len;
+ int result;
unsigned int sense_len;
unsigned int resid_len; /* residual count */
int retries;
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 09/25] scsi: introduce a new result field in struct scsi_request
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
This passes on the scsi_cmnd result field to users of passthrough
requests. Currently we abuse req->errors for this purpose, but that
field will go away in its current form.
Note that the old IDE code abuses the errors field in very creative
ways and stores all kinds of different values in it. I didn't dare
to touch this magic, so the abuses are brought forward 1:1.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
block/bsg-lib.c | 8 ++++----
block/bsg.c | 12 +++++------
block/scsi_ioctl.c | 14 ++++++-------
drivers/block/cciss.c | 42 +++++++++++++++++++-------------------
drivers/block/pktcdvd.c | 2 +-
drivers/block/virtio_blk.c | 2 +-
drivers/cdrom/cdrom.c | 2 +-
drivers/ide/ide-atapi.c | 10 ++++-----
drivers/ide/ide-cd.c | 20 +++++++++---------
drivers/ide/ide-cd_ioctl.c | 2 +-
drivers/ide/ide-devsets.c | 4 ++--
drivers/ide/ide-dma.c | 2 +-
drivers/ide/ide-eh.c | 36 ++++++++++++++++----------------
drivers/ide/ide-floppy.c | 10 ++++-----
drivers/ide/ide-io.c | 10 ++++-----
drivers/ide/ide-ioctls.c | 4 ++--
drivers/ide/ide-park.c | 2 +-
drivers/ide/ide-pm.c | 8 ++++----
drivers/ide/ide-tape.c | 4 ++--
drivers/ide/ide-taskfile.c | 6 +++---
drivers/scsi/osd/osd_initiator.c | 2 +-
drivers/scsi/osst.c | 2 +-
drivers/scsi/qla2xxx/qla_bsg.c | 6 +++---
drivers/scsi/scsi_lib.c | 18 +++++++---------
drivers/scsi/scsi_transport_sas.c | 2 +-
drivers/scsi/sg.c | 2 +-
drivers/scsi/st.c | 6 +++---
drivers/target/target_core_pscsi.c | 2 +-
fs/nfsd/blocklayout.c | 4 ++--
include/linux/ide.h | 2 +-
include/scsi/scsi_request.h | 1 +
31 files changed, 122 insertions(+), 125 deletions(-)
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index cd15f9dbb147..0a23dbba2d30 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -37,7 +37,7 @@ static void bsg_destroy_job(struct kref *kref)
struct bsg_job *job = container_of(kref, struct bsg_job, kref);
struct request *rq = job->req;
- blk_end_request_all(rq, rq->errors);
+ blk_end_request_all(rq, scsi_req(rq)->result);
put_device(job->dev); /* release reference for the request */
@@ -74,7 +74,7 @@ void bsg_job_done(struct bsg_job *job, int result,
struct scsi_request *rq = scsi_req(req);
int err;
- err = job->req->errors = result;
+ err = scsi_req(job->req)->result = result;
if (err < 0)
/* we're only returning the result field in the reply */
rq->sense_len = sizeof(u32);
@@ -177,7 +177,7 @@ static int bsg_create_job(struct device *dev, struct request *req)
* @q: request queue to manage
*
* On error the create_bsg_job function should return a -Exyz error value
- * that will be set to the req->errors.
+ * that will be set to ->result.
*
* Drivers/subsys should pass this to the queue init function.
*/
@@ -201,7 +201,7 @@ static void bsg_request_fn(struct request_queue *q)
ret = bsg_create_job(dev, req);
if (ret) {
- req->errors = ret;
+ scsi_req(req)->result = ret;
blk_end_request_all(req, ret);
spin_lock_irq(q->queue_lock);
continue;
diff --git a/block/bsg.c b/block/bsg.c
index 74835dbf0c47..e54daf9f2ee0 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -391,13 +391,13 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
struct scsi_request *req = scsi_req(rq);
int ret = 0;
- dprintk("rq %p bio %p 0x%x\n", rq, bio, rq->errors);
+ dprintk("rq %p bio %p 0x%x\n", rq, bio, rq->result);
/*
* fill in all the output members
*/
- hdr->device_status = rq->errors & 0xff;
- hdr->transport_status = host_byte(rq->errors);
- hdr->driver_status = driver_byte(rq->errors);
+ hdr->device_status = req->result & 0xff;
+ hdr->transport_status = host_byte(req->result);
+ hdr->driver_status = driver_byte(req->result);
hdr->info = 0;
if (hdr->device_status || hdr->transport_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
@@ -431,8 +431,8 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
* just a protocol response (i.e. non negative), that gets
* processed above.
*/
- if (!ret && rq->errors < 0)
- ret = rq->errors;
+ if (!ret && req->result < 0)
+ ret = req->result;
blk_rq_unmap_user(bio);
scsi_req_free_cmd(req);
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index b1352143f12f..4a294a5f7fab 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -262,11 +262,11 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
/*
* fill in all the output members
*/
- hdr->status = rq->errors & 0xff;
- hdr->masked_status = status_byte(rq->errors);
- hdr->msg_status = msg_byte(rq->errors);
- hdr->host_status = host_byte(rq->errors);
- hdr->driver_status = driver_byte(rq->errors);
+ hdr->status = req->result & 0xff;
+ hdr->masked_status = status_byte(req->result);
+ hdr->msg_status = msg_byte(req->result);
+ hdr->host_status = host_byte(req->result);
+ hdr->driver_status = driver_byte(req->result);
hdr->info = 0;
if (hdr->masked_status || hdr->host_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
@@ -509,7 +509,7 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
blk_execute_rq(q, disk, rq, 0);
- err = rq->errors & 0xff; /* only 8 bit SCSI status */
+ err = req->result & 0xff; /* only 8 bit SCSI status */
if (err) {
if (req->sense_len && req->sense) {
bytes = (OMAX_SB_LEN > req->sense_len) ?
@@ -548,7 +548,7 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
scsi_req(rq)->cmd[4] = data;
scsi_req(rq)->cmd_len = 6;
blk_execute_rq(q, bd_disk, rq, 0);
- err = rq->errors ? -EIO : 0;
+ err = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
return err;
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 8e1a4554951c..cd375503f7b0 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1864,8 +1864,7 @@ static void cciss_softirq_done(struct request *rq)
/* set the residual count for pc requests */
if (blk_rq_is_passthrough(rq))
scsi_req(rq)->resid_len = c->err_info->ResidualCnt;
-
- blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
+ blk_end_request_all(rq, scsi_req(rq)->result ? -EIO : 0);
spin_lock_irqsave(&h->lock, flags);
cmd_free(h, c);
@@ -3140,18 +3139,19 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
{
int retry_cmd = 0;
struct request *rq = cmd->rq;
+ struct scsi_request *sreq = scsi_req(rq);
- rq->errors = 0;
+ sreq->result = 0;
if (timeout)
- rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
+ sreq->result = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
goto after_error_processing;
switch (cmd->err_info->CommandStatus) {
case CMD_TARGET_STATUS:
- rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
+ sreq->result = evaluate_target_status(h, cmd, &retry_cmd);
break;
case CMD_DATA_UNDERRUN:
if (!blk_rq_is_passthrough(cmd->rq)) {
@@ -3169,7 +3169,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_INVALID:
dev_warn(&h->pdev->dev, "cciss: cmd %p is "
"reported invalid\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3177,7 +3177,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_PROTOCOL_ERR:
dev_warn(&h->pdev->dev, "cciss: cmd %p has "
"protocol error\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3185,7 +3185,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_HARDWARE_ERR:
dev_warn(&h->pdev->dev, "cciss: cmd %p had "
" hardware error\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3193,7 +3193,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_CONNECTION_LOST:
dev_warn(&h->pdev->dev, "cciss: cmd %p had "
"connection lost\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3201,7 +3201,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_ABORTED:
dev_warn(&h->pdev->dev, "cciss: cmd %p was "
"aborted\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ABORT);
@@ -3209,7 +3209,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
case CMD_ABORT_FAILED:
dev_warn(&h->pdev->dev, "cciss: cmd %p reports "
"abort failed\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3224,21 +3224,21 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
} else
dev_warn(&h->pdev->dev,
"%p retried too many times\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ABORT);
break;
case CMD_TIMEOUT:
dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_UNABORTABLE:
dev_warn(&h->pdev->dev, "cmd %p unabortable\n", cmd);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3247,7 +3247,7 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
dev_warn(&h->pdev->dev, "cmd %p returned "
"unknown status %x\n", cmd,
cmd->err_info->CommandStatus);
- rq->errors = make_status_bytes(SAM_STAT_GOOD,
+ sreq->result = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_rq_is_passthrough(cmd->rq) ?
DID_PASSTHROUGH : DID_ERROR);
@@ -3380,9 +3380,9 @@ static void do_cciss_request(struct request_queue *q)
if (dma_mapping_error(&h->pdev->dev, temp64.val)) {
dev_warn(&h->pdev->dev,
"%s: error mapping page for DMA\n", __func__);
- creq->errors = make_status_bytes(SAM_STAT_GOOD,
- 0, DRIVER_OK,
- DID_SOFT_ERROR);
+ scsi_req(creq)->result =
+ make_status_bytes(SAM_STAT_GOOD, 0, DRIVER_OK,
+ DID_SOFT_ERROR);
cmd_free(h, c);
return;
}
@@ -3395,9 +3395,9 @@ static void do_cciss_request(struct request_queue *q)
if (cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
(seg - (h->max_cmd_sgentries - 1)) *
sizeof(SGDescriptor_struct))) {
- creq->errors = make_status_bytes(SAM_STAT_GOOD,
- 0, DRIVER_OK,
- DID_SOFT_ERROR);
+ scsi_req(creq)->result =
+ make_status_bytes(SAM_STAT_GOOD, 0, DRIVER_OK,
+ DID_SOFT_ERROR);
cmd_free(h, c);
return;
}
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 66d846ba85a9..205b865ebeb9 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -724,7 +724,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
rq->rq_flags |= RQF_QUIET;
blk_execute_rq(rq->q, pd->bdev->bd_disk, rq, 0);
- if (rq->errors)
+ if (scsi_req(rq)->result)
ret = -EIO;
out:
blk_put_request(rq);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 8378ad480f77..dea2a58d6734 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -119,7 +119,7 @@ static inline void virtblk_scsi_request_done(struct request *req)
sreq->resid_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.residual);
sreq->sense_len = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.sense_len);
- req->errors = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.errors);
+ sreq->result = virtio32_to_cpu(vblk->vdev, vbr->in_hdr.errors);
}
static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 308501730ab3..76c952fd9ab9 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2219,7 +2219,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
bio = rq->bio;
blk_execute_rq(q, cdi->disk, rq, 0);
- if (rq->errors) {
+ if (scsi_req(rq)->result) {
struct request_sense *s = req->sense;
ret = -EIO;
cdi->last_sense = s->sense_key;
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 1524797e1776..5901937284e7 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -108,7 +108,7 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
if (drive->media == ide_tape)
scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1;
blk_execute_rq(drive->queue, disk, rq, 0);
- error = rq->errors ? -EIO : 0;
+ error = scsi_req(rq)->result ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
@@ -455,7 +455,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
debug_log("%s: I/O error\n", drive->name);
if (drive->media != ide_tape)
- pc->rq->errors++;
+ scsi_req(pc->rq)->result++;
if (scsi_req(rq)->cmd[0] == REQUEST_SENSE) {
printk(KERN_ERR PFX "%s: I/O error in request "
@@ -489,13 +489,13 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
drive->failed_pc = NULL;
if (ata_misc_request(rq)) {
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
error = 0;
} else {
if (blk_rq_is_passthrough(rq) && uptodate <= 0) {
- if (rq->errors == 0)
- rq->errors = -EIO;
+ if (scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
}
error = uptodate ? 0 : -EIO;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 95c40afa9120..07e5ff3a64c3 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -247,10 +247,10 @@ static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
struct cdrom_info *info = drive->driver_data;
- if (!rq->errors)
+ if (!scsi_req(rq)->result)
info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
- rq->errors = 1;
+ scsi_req(rq)->result = 1;
if (time_after(jiffies, info->write_timeout))
return 0;
@@ -294,8 +294,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
}
/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
- if (blk_rq_is_scsi(rq) && !rq->errors)
- rq->errors = SAM_STAT_CHECK_CONDITION;
+ if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
+ scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
if (blk_noretry_request(rq))
do_end_request = 1;
@@ -325,7 +325,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
* Arrange to retry the request but be sure to give up if we've
* retried too many times.
*/
- if (++rq->errors > ERROR_MAX)
+ if (++scsi_req(rq)->result > ERROR_MAX)
do_end_request = 1;
break;
case ILLEGAL_REQUEST:
@@ -372,7 +372,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
/* go to the default handler for other errors */
ide_error(drive, "cdrom_decode_status", stat);
return 1;
- } else if (++rq->errors > ERROR_MAX)
+ } else if (++scsi_req(rq)->result > ERROR_MAX)
/* we've racked up too many retries, abort */
do_end_request = 1;
}
@@ -453,7 +453,7 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
}
blk_execute_rq(drive->queue, info->disk, rq, 0);
- error = rq->errors ? -EIO : 0;
+ error = scsi_req(rq)->result ? -EIO : 0;
if (buffer)
*bufflen = scsi_req(rq)->resid_len;
@@ -684,8 +684,8 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
if (cmd->nleft == 0)
uptodate = 1;
} else {
- if (uptodate <= 0 && rq->errors == 0)
- rq->errors = -EIO;
+ if (uptodate <= 0 && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
}
if (uptodate == 0 && rq->bio)
@@ -1380,7 +1380,7 @@ static int ide_cdrom_prep_pc(struct request *rq)
* appropriate action
*/
if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
- rq->errors = ILLEGAL_REQUEST;
+ scsi_req(rq)->result = ILLEGAL_REQUEST;
return BLKPREP_KILL;
}
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index f1ab726bd430..55cd736c39c6 100644
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -308,7 +308,7 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
ide_req(rq)->type = ATA_PRIV_MISC;
rq->rq_flags = RQF_QUIET;
blk_execute_rq(drive->queue, cd->disk, rq, 0);
- ret = rq->errors ? -EIO : 0;
+ ret = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
/*
* A reset will unlock the door. If it was previously locked,
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
index eea6a7cb80b5..b1223234037d 100644
--- a/drivers/ide/ide-devsets.c
+++ b/drivers/ide/ide-devsets.c
@@ -174,7 +174,7 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
rq->special = setting->set;
blk_execute_rq(q, NULL, rq, 0);
- ret = rq->errors;
+ ret = scsi_req(rq)->result;
blk_put_request(rq);
return ret;
@@ -186,7 +186,7 @@ ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
err = setfunc(drive, *(int *)&scsi_req(rq)->cmd[1]);
if (err)
- rq->errors = err;
+ scsi_req(rq)->result = err;
ide_complete_rq(drive, err, blk_rq_bytes(rq));
return ide_stopped;
}
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 17a65ac56491..51c81223e56d 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -490,7 +490,7 @@ ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
* make sure request is sane
*/
if (hwif->rq)
- hwif->rq->errors = 0;
+ scsi_req(hwif->rq)->result = 0;
return ret;
}
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
index cf3af6840368..4b7ffd7d158d 100644
--- a/drivers/ide/ide-eh.c
+++ b/drivers/ide/ide-eh.c
@@ -12,7 +12,7 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
if ((stat & ATA_BUSY) ||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
/* other bits are useless when BUSY */
- rq->errors |= ERROR_RESET;
+ scsi_req(rq)->result |= ERROR_RESET;
} else if (stat & ATA_ERR) {
/* err has different meaning on cdrom and tape */
if (err == ATA_ABORTED) {
@@ -25,10 +25,10 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
drive->crc_count++;
} else if (err & (ATA_BBK | ATA_UNC)) {
/* retries won't help these */
- rq->errors = ERROR_MAX;
+ scsi_req(rq)->result = ERROR_MAX;
} else if (err & ATA_TRK0NF) {
/* help it find track zero */
- rq->errors |= ERROR_RECAL;
+ scsi_req(rq)->result |= ERROR_RECAL;
}
}
@@ -39,23 +39,23 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
}
- if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {
+ if (scsi_req(rq)->result >= ERROR_MAX || blk_noretry_request(rq)) {
ide_kill_rq(drive, rq);
return ide_stopped;
}
if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
- rq->errors |= ERROR_RESET;
+ scsi_req(rq)->result |= ERROR_RESET;
- if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
- ++rq->errors;
+ if ((scsi_req(rq)->result & ERROR_RESET) == ERROR_RESET) {
+ ++scsi_req(rq)->result;
return ide_do_reset(drive);
}
- if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
+ if ((scsi_req(rq)->result & ERROR_RECAL) == ERROR_RECAL)
drive->special_flags |= IDE_SFLAG_RECALIBRATE;
- ++rq->errors;
+ ++scsi_req(rq)->result;
return ide_stopped;
}
@@ -68,7 +68,7 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq,
if ((stat & ATA_BUSY) ||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
/* other bits are useless when BUSY */
- rq->errors |= ERROR_RESET;
+ scsi_req(rq)->result |= ERROR_RESET;
} else {
/* add decoding error stuff */
}
@@ -77,14 +77,14 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq,
/* force an abort */
hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
- if (rq->errors >= ERROR_MAX) {
+ if (scsi_req(rq)->result >= ERROR_MAX) {
ide_kill_rq(drive, rq);
} else {
- if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
- ++rq->errors;
+ if ((scsi_req(rq)->result & ERROR_RESET) == ERROR_RESET) {
+ ++scsi_req(rq)->result;
return ide_do_reset(drive);
}
- ++rq->errors;
+ ++scsi_req(rq)->result;
}
return ide_stopped;
@@ -130,11 +130,11 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
if (cmd)
ide_complete_cmd(drive, cmd, stat, err);
} else if (ata_pm_request(rq)) {
- rq->errors = 1;
+ scsi_req(rq)->result = 1;
ide_complete_pm_rq(drive, rq);
return ide_stopped;
}
- rq->errors = err;
+ scsi_req(rq)->result = err;
ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
return ide_stopped;
}
@@ -149,8 +149,8 @@ static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
if (rq && ata_misc_request(rq) &&
scsi_req(rq)->cmd[0] == REQ_DRIVE_RESET) {
- if (err <= 0 && rq->errors == 0)
- rq->errors = -EIO;
+ if (err <= 0 && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
ide_complete_rq(drive, err ? err : 0, blk_rq_bytes(rq));
}
}
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index a69e8013f1df..8ac6048cd2df 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -98,7 +98,7 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
}
if (ata_misc_request(rq))
- rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
+ scsi_req(rq)->result = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
return uptodate;
}
@@ -239,7 +239,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
? rq->rq_disk->disk_name
: "dev?"));
- if (rq->errors >= ERROR_MAX) {
+ if (scsi_req(rq)->result >= ERROR_MAX) {
if (drive->failed_pc) {
ide_floppy_report_error(floppy, drive->failed_pc);
drive->failed_pc = NULL;
@@ -247,7 +247,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
if (ata_misc_request(rq)) {
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
return ide_stopped;
} else
@@ -301,8 +301,8 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
return ide_floppy_issue_pc(drive, &cmd, pc);
out_end:
drive->failed_pc = NULL;
- if (blk_rq_is_passthrough(rq) && rq->errors == 0)
- rq->errors = -EIO;
+ if (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
return ide_stopped;
}
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 043b1fb963cb..45b3f41a43d4 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -141,12 +141,12 @@ void ide_kill_rq(ide_drive_t *drive, struct request *rq)
drive->failed_pc = NULL;
if ((media == ide_floppy || media == ide_tape) && drv_req) {
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
} else {
if (media == ide_tape)
- rq->errors = IDE_DRV_ERROR_GENERAL;
- else if (blk_rq_is_passthrough(rq) && rq->errors == 0)
- rq->errors = -EIO;
+ scsi_req(rq)->result = IDE_DRV_ERROR_GENERAL;
+ else if (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
}
ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
@@ -271,7 +271,7 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
#ifdef DEBUG
printk("%s: DRIVE_CMD (null)\n", drive->name);
#endif
- rq->errors = 0;
+ scsi_req(rq)->result = 0;
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
return ide_stopped;
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
index 3e96e531b367..8c0d17297a7a 100644
--- a/drivers/ide/ide-ioctls.c
+++ b/drivers/ide/ide-ioctls.c
@@ -129,7 +129,7 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
scsi_req_init(rq);
ide_req(rq)->type = ATA_PRIV_TASKFILE;
blk_execute_rq(drive->queue, NULL, rq, 0);
- err = rq->errors ? -EIO : 0;
+ err = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
return err;
@@ -229,7 +229,7 @@ static int generic_drive_reset(ide_drive_t *drive)
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
blk_execute_rq(drive->queue, NULL, rq, 1);
- ret = rq->errors;
+ ret = scsi_req(rq)->result;
blk_put_request(rq);
return ret;
}
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
index b4f577016f5a..94e3107f59b9 100644
--- a/drivers/ide/ide-park.c
+++ b/drivers/ide/ide-park.c
@@ -38,7 +38,7 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = &timeout;
blk_execute_rq(q, NULL, rq, 1);
- rc = rq->errors ? -EIO : 0;
+ rc = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
if (rc)
goto out;
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index bf513f886f3c..277c2bb7616f 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -28,7 +28,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
rqpm.pm_state = mesg.event;
blk_execute_rq(drive->queue, NULL, rq, 0);
- ret = rq->errors ? -EIO : 0;
+ ret = scsi_req(rq)->result ? -EIO : 0;
blk_put_request(rq);
if (ret == 0 && ide_port_acpi(hwif)) {
@@ -56,8 +56,8 @@ static int ide_pm_execute_rq(struct request *rq)
spin_lock_irq(q->queue_lock);
if (unlikely(blk_queue_dying(q))) {
rq->rq_flags |= RQF_QUIET;
- rq->errors = -ENXIO;
- __blk_end_request_all(rq, rq->errors);
+ scsi_req(rq)->result = -ENXIO;
+ __blk_end_request_all(rq, scsi_req(rq)->result);
spin_unlock_irq(q->queue_lock);
return -ENXIO;
}
@@ -67,7 +67,7 @@ static int ide_pm_execute_rq(struct request *rq)
wait_for_completion_io(&wait);
- return rq->errors ? -EIO : 0;
+ return scsi_req(rq)->result ? -EIO : 0;
}
int generic_ide_resume(struct device *dev)
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index d8a552b47718..a0651f948b76 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -366,7 +366,7 @@ static int ide_tape_callback(ide_drive_t *drive, int dsc)
err = pc->error;
}
}
- rq->errors = err;
+ scsi_req(rq)->result = err;
return uptodate;
}
@@ -879,7 +879,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
tape->valid = 0;
ret = size;
- if (rq->errors == IDE_DRV_ERROR_GENERAL)
+ if (scsi_req(rq)->result == IDE_DRV_ERROR_GENERAL)
ret = -EIO;
out_put:
blk_put_request(rq);
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 78924c7c9478..d71199d23c9e 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -287,7 +287,7 @@ static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
u8 saved_io_32bit = drive->io_32bit;
if (cmd->tf_flags & IDE_TFLAG_FS)
- cmd->rq->errors = 0;
+ scsi_req(cmd->rq)->result = 0;
if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
drive->io_32bit = 0;
@@ -329,7 +329,7 @@ void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
ide_complete_cmd(drive, cmd, stat, err);
- rq->errors = err;
+ scsi_req(rq)->result = err;
if (err == 0 && set_xfer) {
ide_set_xfer_rate(drive, nsect);
@@ -453,7 +453,7 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
cmd->rq = rq;
blk_execute_rq(drive->queue, NULL, rq, 0);
- error = rq->errors ? -EIO : 0;
+ error = scsi_req(rq)->result ? -EIO : 0;
put_req:
blk_put_request(rq);
return error;
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 44e03c3eb250..8d6e2859d9f9 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -477,7 +477,7 @@ static void _set_error_resid(struct osd_request *or, struct request *req,
int error)
{
or->async_error = error;
- or->req_errors = req->errors ? : error;
+ or->req_errors = scsi_req(req)->result ? : error;
or->sense_len = scsi_req(req)->sense_len;
if (or->sense_len)
memcpy(or->sense, scsi_req(req)->sense, or->sense_len);
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 41bc1d64bf86..67cbed92f07d 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -327,7 +327,7 @@ static void osst_end_async(struct request *req, int update)
struct osst_tape *STp = SRpnt->stp;
struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data;
- STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors;
+ STp->buffer->cmdstat.midlevel_result = SRpnt->result = rq->result;
#if DEBUG
STp->write_pending = 0;
#endif
diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 84c9098cc089..b6e40fd4c3c1 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -2553,13 +2553,13 @@ qla24xx_bsg_timeout(struct bsg_job *bsg_job)
ql_log(ql_log_warn, vha, 0x7089,
"mbx abort_command "
"failed.\n");
- bsg_job->req->errors =
+ scsi_req(bsg_job->req)->result =
bsg_reply->result = -EIO;
} else {
ql_dbg(ql_dbg_user, vha, 0x708a,
"mbx abort_command "
"success.\n");
- bsg_job->req->errors =
+ scsi_req(bsg_job->req)->result =
bsg_reply->result = 0;
}
spin_lock_irqsave(&ha->hardware_lock, flags);
@@ -2570,7 +2570,7 @@ qla24xx_bsg_timeout(struct bsg_job *bsg_job)
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ql_log(ql_log_info, vha, 0x708b, "SRB not found to abort.\n");
- bsg_job->req->errors = bsg_reply->result = -ENXIO;
+ scsi_req(bsg_job->req)->result = bsg_reply->result = -ENXIO;
return 0;
done:
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 89b4d9e69866..8c7652f04900 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -229,8 +229,8 @@ void scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
* @rq_flags: flags for ->rq_flags
* @resid: optional residual length
*
- * returns the req->errors value which is the scsi_cmnd result
- * field.
+ * Returns the scsi_cmnd result field if a command was executed, or a negative
+ * Linux error code if we didn't get that war.
*/
int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
@@ -281,7 +281,7 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
memcpy(sense, rq->sense, SCSI_SENSE_BUFFERSIZE);
if (sshdr)
scsi_normalize_sense(rq->sense, rq->sense_len, sshdr);
- ret = req->errors;
+ ret = rq->result;
out:
blk_put_request(req);
@@ -790,11 +790,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
SCSI_SENSE_BUFFERSIZE);
}
- /*
- * __scsi_error_from_host_byte may have reset the host_byte
- */
- req->errors = cmd->result;
-
+ scsi_req(req)->result = cmd->result;
scsi_req(req)->resid_len = scsi_get_resid(cmd);
if (scsi_bidi_cmnd(cmd)) {
@@ -824,7 +820,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
/*
* Recovered errors need reporting, but they're always treated as
* success, so fiddle the result code here. For passthrough requests
- * we already took a copy of the original into rq->errors which
+ * we already took a copy of the original into sreq->result which
* is what gets returned to the user
*/
if (sense_valid && (sshdr.sense_key == RECOVERED_ERROR)) {
@@ -1267,7 +1263,7 @@ scsi_prep_return(struct request_queue *q, struct request *req, int ret)
switch (ret) {
case BLKPREP_KILL:
case BLKPREP_INVALID:
- req->errors = DID_NO_CONNECT << 16;
+ scsi_req(req)->result = DID_NO_CONNECT << 16;
/* release the command and kill it */
if (req->special) {
struct scsi_cmnd *cmd = req->special;
@@ -1891,7 +1887,7 @@ static int scsi_mq_prep_fn(struct request *req)
static void scsi_mq_done(struct scsi_cmnd *cmd)
{
trace_scsi_dispatch_cmd_done(cmd);
- blk_mq_complete_request(cmd->request, cmd->request->errors);
+ blk_mq_complete_request(cmd->request, 0);
}
static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index cdbb293aca08..a2b279737a4b 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -184,7 +184,7 @@ static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
blk_rq_bytes(req->next_rq);
handler = to_sas_internal(shost->transportt)->f->smp_handler;
ret = handler(shost, rphy, req);
- req->errors = ret;
+ scsi_req(req)->result = ret;
blk_end_request_all(req, ret);
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index c5aaceea8d77..504504beaa5e 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1300,7 +1300,7 @@ sg_rq_end_io(struct request *rq, int uptodate)
pr_info("%s: device detaching\n", __func__);
sense = req->sense;
- result = rq->errors;
+ result = req->result;
resid = req->resid_len;
SCSI_LOG_TIMEOUT(4, sg_printk(KERN_INFO, sdp,
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 5408643431bb..1ea34d6f5437 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -480,7 +480,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req)
atomic64_add(ktime_to_ns(now), &STp->stats->tot_write_time);
atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time);
atomic64_inc(&STp->stats->write_cnt);
- if (req->errors) {
+ if (scsi_req(req)->result) {
atomic64_add(atomic_read(&STp->stats->last_write_size)
- STp->buffer->cmdstat.residual,
&STp->stats->write_byte_cnt);
@@ -494,7 +494,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req)
atomic64_add(ktime_to_ns(now), &STp->stats->tot_read_time);
atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time);
atomic64_inc(&STp->stats->read_cnt);
- if (req->errors) {
+ if (scsi_req(req)->result) {
atomic64_add(atomic_read(&STp->stats->last_read_size)
- STp->buffer->cmdstat.residual,
&STp->stats->read_byte_cnt);
@@ -518,7 +518,7 @@ static void st_scsi_execute_end(struct request *req, int uptodate)
struct scsi_tape *STp = SRpnt->stp;
struct bio *tmp;
- STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors;
+ STp->buffer->cmdstat.midlevel_result = SRpnt->result = rq->result;
STp->buffer->cmdstat.residual = rq->resid_len;
st_do_stats(STp, req);
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index c7fa372c527a..a93d94e68ab5 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1050,7 +1050,7 @@ static void pscsi_req_done(struct request *req, int uptodate)
struct se_cmd *cmd = req->end_io_data;
struct pscsi_plugin_task *pt = cmd->priv;
- pt->pscsi_result = req->errors;
+ pt->pscsi_result = scsi_req(req)->result;
pt->pscsi_resid = scsi_req(req)->resid_len;
cmd->scsi_status = status_byte(pt->pscsi_result) << 1;
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 4b72fdf67548..91b72c1560ef 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -243,9 +243,9 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
req->cmd_len = COMMAND_SIZE(INQUIRY);
blk_execute_rq(rq->q, NULL, rq, 1);
- if (rq->errors) {
+ if (req->result) {
pr_err("pNFS: INQUIRY 0x83 failed with: %x\n",
- rq->errors);
+ req->result);
goto out_put_request;
}
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 2f51c1724b5a..6980ca322074 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -88,7 +88,7 @@ static inline bool ata_pm_request(struct request *rq)
ide_req(rq)->type == ATA_PRIV_PM_RESUME);
}
-/* Error codes returned in rq->errors to the higher part of the driver. */
+/* Error codes returned in result to the higher part of the driver. */
enum {
IDE_DRV_ERROR_GENERAL = 101,
IDE_DRV_ERROR_FILEMARK = 102,
diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h
index 7c583a0f363a..f0c76f9dc285 100644
--- a/include/scsi/scsi_request.h
+++ b/include/scsi/scsi_request.h
@@ -9,6 +9,7 @@ struct scsi_request {
unsigned char __cmd[BLK_MAX_CDB];
unsigned char *cmd;
unsigned short cmd_len;
+ int result;
unsigned int sense_len;
unsigned int resid_len; /* residual count */
int retries;
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 10/25] loop: zero-fill bio on the submitting cpu
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
In thruth I've just audited which blk-mq drivers don't currently have a
complete callback, but I think this change is at least borderline useful.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/loop.c | 30 ++++++++++++++----------------
drivers/block/loop.h | 1 +
2 files changed, 15 insertions(+), 16 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index cc981f34e017..6924ec611a49 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -445,32 +445,27 @@ static int lo_req_flush(struct loop_device *lo, struct request *rq)
return ret;
}
-static inline void handle_partial_read(struct loop_cmd *cmd, long bytes)
+static void lo_complete_rq(struct request *rq)
{
- if (bytes < 0 || op_is_write(req_op(cmd->rq)))
- return;
+ struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
- if (unlikely(bytes < blk_rq_bytes(cmd->rq))) {
+ if (unlikely(req_op(cmd->rq) == REQ_OP_READ && cmd->use_aio &&
+ cmd->ret >= 0 && cmd->ret < blk_rq_bytes(cmd->rq))) {
struct bio *bio = cmd->rq->bio;
- bio_advance(bio, bytes);
+ bio_advance(bio, cmd->ret);
zero_fill_bio(bio);
}
+
+ blk_mq_end_request(rq, cmd->ret < 0 ? -EIO : 0);
}
static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
{
struct loop_cmd *cmd = container_of(iocb, struct loop_cmd, iocb);
- struct request *rq = cmd->rq;
-
- handle_partial_read(cmd, ret);
- if (ret > 0)
- ret = 0;
- else if (ret < 0)
- ret = -EIO;
-
- blk_mq_complete_request(rq, ret);
+ cmd->ret = ret;
+ blk_mq_complete_request(cmd->rq, 0);
}
static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
@@ -1686,8 +1681,10 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
ret = do_req_filebacked(lo, cmd->rq);
failed:
/* complete non-aio request */
- if (!cmd->use_aio || ret)
- blk_mq_complete_request(cmd->rq, ret ? -EIO : 0);
+ if (!cmd->use_aio || ret) {
+ cmd->ret = ret ? -EIO : 0;
+ blk_mq_complete_request(cmd->rq, 0);
+ }
}
static void loop_queue_work(struct kthread_work *work)
@@ -1713,6 +1710,7 @@ static int loop_init_request(void *data, struct request *rq,
static const struct blk_mq_ops loop_mq_ops = {
.queue_rq = loop_queue_rq,
.init_request = loop_init_request,
+ .complete = lo_complete_rq,
};
static int loop_add(struct loop_device **l, int i)
diff --git a/drivers/block/loop.h b/drivers/block/loop.h
index fb2237c73e61..fecd3f97ef8c 100644
--- a/drivers/block/loop.h
+++ b/drivers/block/loop.h
@@ -70,6 +70,7 @@ struct loop_cmd {
struct request *rq;
struct list_head list;
bool use_aio; /* use AIO interface to handle I/O */
+ long ret;
struct kiocb iocb;
};
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 10/25] loop: zero-fill bio on the submitting cpu
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
In thruth I've just audited which blk-mq drivers don't currently have a
complete callback, but I think this change is at least borderline useful.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/loop.c | 30 ++++++++++++++----------------
drivers/block/loop.h | 1 +
2 files changed, 15 insertions(+), 16 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index cc981f34e017..6924ec611a49 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -445,32 +445,27 @@ static int lo_req_flush(struct loop_device *lo, struct request *rq)
return ret;
}
-static inline void handle_partial_read(struct loop_cmd *cmd, long bytes)
+static void lo_complete_rq(struct request *rq)
{
- if (bytes < 0 || op_is_write(req_op(cmd->rq)))
- return;
+ struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
- if (unlikely(bytes < blk_rq_bytes(cmd->rq))) {
+ if (unlikely(req_op(cmd->rq) == REQ_OP_READ && cmd->use_aio &&
+ cmd->ret >= 0 && cmd->ret < blk_rq_bytes(cmd->rq))) {
struct bio *bio = cmd->rq->bio;
- bio_advance(bio, bytes);
+ bio_advance(bio, cmd->ret);
zero_fill_bio(bio);
}
+
+ blk_mq_end_request(rq, cmd->ret < 0 ? -EIO : 0);
}
static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
{
struct loop_cmd *cmd = container_of(iocb, struct loop_cmd, iocb);
- struct request *rq = cmd->rq;
-
- handle_partial_read(cmd, ret);
- if (ret > 0)
- ret = 0;
- else if (ret < 0)
- ret = -EIO;
-
- blk_mq_complete_request(rq, ret);
+ cmd->ret = ret;
+ blk_mq_complete_request(cmd->rq, 0);
}
static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
@@ -1686,8 +1681,10 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
ret = do_req_filebacked(lo, cmd->rq);
failed:
/* complete non-aio request */
- if (!cmd->use_aio || ret)
- blk_mq_complete_request(cmd->rq, ret ? -EIO : 0);
+ if (!cmd->use_aio || ret) {
+ cmd->ret = ret ? -EIO : 0;
+ blk_mq_complete_request(cmd->rq, 0);
+ }
}
static void loop_queue_work(struct kthread_work *work)
@@ -1713,6 +1710,7 @@ static int loop_init_request(void *data, struct request *rq,
static const struct blk_mq_ops loop_mq_ops = {
.queue_rq = loop_queue_rq,
.init_request = loop_init_request,
+ .complete = lo_complete_rq,
};
static int loop_add(struct loop_device **l, int i)
diff --git a/drivers/block/loop.h b/drivers/block/loop.h
index fb2237c73e61..fecd3f97ef8c 100644
--- a/drivers/block/loop.h
+++ b/drivers/block/loop.h
@@ -70,6 +70,7 @@ struct loop_cmd {
struct request *rq;
struct list_head list;
bool use_aio; /* use AIO interface to handle I/O */
+ long ret;
struct kiocb iocb;
};
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 10/25] loop: zero-fill bio on the submitting cpu
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-12 10:24 ` Ming Lei
-1 siblings, 0 replies; 115+ messages in thread
From: Ming Lei @ 2017-04-12 10:24 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:29PM +0200, Christoph Hellwig wrote:
> In thruth I've just audited which blk-mq drivers don't currently have a
> complete callback, but I think this change is at least borderline useful.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/block/loop.c | 30 ++++++++++++++----------------
> drivers/block/loop.h | 1 +
> 2 files changed, 15 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/block/loop.c b/drivers/block/loop.c
> index cc981f34e017..6924ec611a49 100644
> --- a/drivers/block/loop.c
> +++ b/drivers/block/loop.c
> @@ -445,32 +445,27 @@ static int lo_req_flush(struct loop_device *lo, struct request *rq)
> return ret;
> }
>
> -static inline void handle_partial_read(struct loop_cmd *cmd, long bytes)
> +static void lo_complete_rq(struct request *rq)
> {
> - if (bytes < 0 || op_is_write(req_op(cmd->rq)))
> - return;
> + struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
>
> - if (unlikely(bytes < blk_rq_bytes(cmd->rq))) {
> + if (unlikely(req_op(cmd->rq) == REQ_OP_READ && cmd->use_aio &&
> + cmd->ret >= 0 && cmd->ret < blk_rq_bytes(cmd->rq))) {
> struct bio *bio = cmd->rq->bio;
>
> - bio_advance(bio, bytes);
> + bio_advance(bio, cmd->ret);
> zero_fill_bio(bio);
> }
> +
> + blk_mq_end_request(rq, cmd->ret < 0 ? -EIO : 0);
> }
>
> static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
> {
> struct loop_cmd *cmd = container_of(iocb, struct loop_cmd, iocb);
> - struct request *rq = cmd->rq;
> -
> - handle_partial_read(cmd, ret);
>
> - if (ret > 0)
> - ret = 0;
> - else if (ret < 0)
> - ret = -EIO;
> -
> - blk_mq_complete_request(rq, ret);
> + cmd->ret = ret;
> + blk_mq_complete_request(cmd->rq, 0);
> }
>
> static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
> @@ -1686,8 +1681,10 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
> ret = do_req_filebacked(lo, cmd->rq);
> failed:
> /* complete non-aio request */
> - if (!cmd->use_aio || ret)
> - blk_mq_complete_request(cmd->rq, ret ? -EIO : 0);
> + if (!cmd->use_aio || ret) {
> + cmd->ret = ret ? -EIO : 0;
> + blk_mq_complete_request(cmd->rq, 0);
> + }
> }
>
> static void loop_queue_work(struct kthread_work *work)
> @@ -1713,6 +1710,7 @@ static int loop_init_request(void *data, struct request *rq,
> static const struct blk_mq_ops loop_mq_ops = {
> .queue_rq = loop_queue_rq,
> .init_request = loop_init_request,
> + .complete = lo_complete_rq,
> };
>
> static int loop_add(struct loop_device **l, int i)
> diff --git a/drivers/block/loop.h b/drivers/block/loop.h
> index fb2237c73e61..fecd3f97ef8c 100644
> --- a/drivers/block/loop.h
> +++ b/drivers/block/loop.h
> @@ -70,6 +70,7 @@ struct loop_cmd {
> struct request *rq;
> struct list_head list;
> bool use_aio; /* use AIO interface to handle I/O */
> + long ret;
> struct kiocb iocb;
> };
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Thanks,
Ming
^ permalink raw reply [flat|nested] 115+ messages in thread* [PATCH 10/25] loop: zero-fill bio on the submitting cpu
@ 2017-04-12 10:24 ` Ming Lei
0 siblings, 0 replies; 115+ messages in thread
From: Ming Lei @ 2017-04-12 10:24 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:29PM +0200, Christoph Hellwig wrote:
> In thruth I've just audited which blk-mq drivers don't currently have a
> complete callback, but I think this change is at least borderline useful.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
> drivers/block/loop.c | 30 ++++++++++++++----------------
> drivers/block/loop.h | 1 +
> 2 files changed, 15 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/block/loop.c b/drivers/block/loop.c
> index cc981f34e017..6924ec611a49 100644
> --- a/drivers/block/loop.c
> +++ b/drivers/block/loop.c
> @@ -445,32 +445,27 @@ static int lo_req_flush(struct loop_device *lo, struct request *rq)
> return ret;
> }
>
> -static inline void handle_partial_read(struct loop_cmd *cmd, long bytes)
> +static void lo_complete_rq(struct request *rq)
> {
> - if (bytes < 0 || op_is_write(req_op(cmd->rq)))
> - return;
> + struct loop_cmd *cmd = blk_mq_rq_to_pdu(rq);
>
> - if (unlikely(bytes < blk_rq_bytes(cmd->rq))) {
> + if (unlikely(req_op(cmd->rq) == REQ_OP_READ && cmd->use_aio &&
> + cmd->ret >= 0 && cmd->ret < blk_rq_bytes(cmd->rq))) {
> struct bio *bio = cmd->rq->bio;
>
> - bio_advance(bio, bytes);
> + bio_advance(bio, cmd->ret);
> zero_fill_bio(bio);
> }
> +
> + blk_mq_end_request(rq, cmd->ret < 0 ? -EIO : 0);
> }
>
> static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
> {
> struct loop_cmd *cmd = container_of(iocb, struct loop_cmd, iocb);
> - struct request *rq = cmd->rq;
> -
> - handle_partial_read(cmd, ret);
>
> - if (ret > 0)
> - ret = 0;
> - else if (ret < 0)
> - ret = -EIO;
> -
> - blk_mq_complete_request(rq, ret);
> + cmd->ret = ret;
> + blk_mq_complete_request(cmd->rq, 0);
> }
>
> static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
> @@ -1686,8 +1681,10 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
> ret = do_req_filebacked(lo, cmd->rq);
> failed:
> /* complete non-aio request */
> - if (!cmd->use_aio || ret)
> - blk_mq_complete_request(cmd->rq, ret ? -EIO : 0);
> + if (!cmd->use_aio || ret) {
> + cmd->ret = ret ? -EIO : 0;
> + blk_mq_complete_request(cmd->rq, 0);
> + }
> }
>
> static void loop_queue_work(struct kthread_work *work)
> @@ -1713,6 +1710,7 @@ static int loop_init_request(void *data, struct request *rq,
> static const struct blk_mq_ops loop_mq_ops = {
> .queue_rq = loop_queue_rq,
> .init_request = loop_init_request,
> + .complete = lo_complete_rq,
> };
>
> static int loop_add(struct loop_device **l, int i)
> diff --git a/drivers/block/loop.h b/drivers/block/loop.h
> index fb2237c73e61..fecd3f97ef8c 100644
> --- a/drivers/block/loop.h
> +++ b/drivers/block/loop.h
> @@ -70,6 +70,7 @@ struct loop_cmd {
> struct request *rq;
> struct list_head list;
> bool use_aio; /* use AIO interface to handle I/O */
> + long ret;
> struct kiocb iocb;
> };
Reviewed-by: Ming Lei <ming.lei at redhat.com>
Thanks,
Ming
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 11/25] null_blk: don't pass always-0 req->errors to blk_mq_complete_request
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/null_blk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index f93906ff31e8..24ca85a70fd8 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -281,7 +281,7 @@ static inline void null_handle_cmd(struct nullb_cmd *cmd)
case NULL_IRQ_SOFTIRQ:
switch (queue_mode) {
case NULL_Q_MQ:
- blk_mq_complete_request(cmd->rq, cmd->rq->errors);
+ blk_mq_complete_request(cmd->rq, 0);
break;
case NULL_Q_RQ:
blk_complete_request(cmd->rq);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 11/25] null_blk: don't pass always-0 req->errors to blk_mq_complete_request
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/null_blk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index f93906ff31e8..24ca85a70fd8 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -281,7 +281,7 @@ static inline void null_handle_cmd(struct nullb_cmd *cmd)
case NULL_IRQ_SOFTIRQ:
switch (queue_mode) {
case NULL_Q_MQ:
- blk_mq_complete_request(cmd->rq, cmd->rq->errors);
+ blk_mq_complete_request(cmd->rq, 0);
break;
case NULL_Q_RQ:
blk_complete_request(cmd->rq);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 12/25] dm rq: don't pass irrelevant error code to blk_mq_complete_request
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
dm never uses rq->errors, so there is no need to pass an error argument
to blk_mq_complete_request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/md/dm-rq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 6886bf160fb2..e1cea42ec2a6 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -358,7 +358,7 @@ static void dm_complete_request(struct request *rq, int error)
if (!rq->q->mq_ops)
blk_complete_request(rq);
else
- blk_mq_complete_request(rq, error);
+ blk_mq_complete_request(rq, 0);
}
/*
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 12/25] dm rq: don't pass irrelevant error code to blk_mq_complete_request
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
dm never uses rq->errors, so there is no need to pass an error argument
to blk_mq_complete_request.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/md/dm-rq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 6886bf160fb2..e1cea42ec2a6 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -358,7 +358,7 @@ static void dm_complete_request(struct request *rq, int error)
if (!rq->q->mq_ops)
blk_complete_request(rq);
else
- blk_mq_complete_request(rq, error);
+ blk_mq_complete_request(rq, 0);
}
/*
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 13/25] dm mpath: don't check for req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
We'll get all proper errors reported through ->end_io and ->errors will
go away soon.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/md/dm-mpath.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 7f223dbed49f..4aa1b865e66e 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1491,7 +1491,7 @@ static int do_end_io(struct multipath *m, struct request *clone,
*/
int r = DM_ENDIO_REQUEUE;
- if (!error && !clone->errors)
+ if (!error)
return 0; /* I/O complete */
if (noretry_error(error))
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 13/25] dm mpath: don't check for req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
We'll get all proper errors reported through ->end_io and ->errors will
go away soon.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/md/dm-mpath.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 7f223dbed49f..4aa1b865e66e 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1491,7 +1491,7 @@ static int do_end_io(struct multipath *m, struct request *clone,
*/
int r = DM_ENDIO_REQUEUE;
- if (!error && !clone->errors)
+ if (!error)
return 0; /* I/O complete */
if (noretry_error(error))
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 14/25] nbd: don't use req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Add a nbd-specific field instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/nbd.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 03ae72985c79..4f045fab9659 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -83,6 +83,7 @@ struct nbd_device {
struct nbd_cmd {
struct nbd_device *nbd;
struct completion send_complete;
+ int status;
};
#if IS_ENABLED(CONFIG_DEBUG_FS)
@@ -152,16 +153,14 @@ static void nbd_size_set(struct nbd_device *nbd, struct block_device *bdev,
nbd_size_update(nbd, bdev);
}
-static void nbd_end_request(struct nbd_cmd *cmd)
+static void nbd_complete_rq(struct request *req)
{
- struct nbd_device *nbd = cmd->nbd;
- struct request *req = blk_mq_rq_from_pdu(cmd);
- int error = req->errors ? -EIO : 0;
+ struct nbd_cmd *cmd = blk_mq_rq_to_pdu(req);
- dev_dbg(nbd_to_dev(nbd), "request %p: %s\n", cmd,
- error ? "failed" : "done");
+ dev_dbg(nbd_to_dev(cmd->nbd), "request %p: %s\n", cmd,
+ cmd->status ? "failed" : "done");
- blk_mq_complete_request(req, error);
+ blk_mq_end_request(req, cmd->status);
}
/*
@@ -193,7 +192,7 @@ static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
dev_err(nbd_to_dev(nbd), "Connection timed out, shutting down connection\n");
set_bit(NBD_TIMEDOUT, &nbd->runtime_flags);
- req->errors = -EIO;
+ cmd->status = -EIO;
mutex_lock(&nbd->config_lock);
sock_shutdown(nbd);
@@ -433,7 +432,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
if (ntohl(reply.error)) {
dev_err(disk_to_dev(nbd->disk), "Other side returned error (%d)\n",
ntohl(reply.error));
- req->errors = -EIO;
+ cmd->status = -EIO;
return cmd;
}
@@ -449,7 +448,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk), "Receive data failed (result %d)\n",
result);
- req->errors = -EIO;
+ cmd->status = -EIO;
return cmd;
}
dev_dbg(nbd_to_dev(nbd), "request %p: got %d bytes data\n",
@@ -499,7 +498,7 @@ static void recv_work(struct work_struct *work)
break;
}
- nbd_end_request(cmd);
+ blk_mq_complete_request(blk_mq_rq_from_pdu(cmd), 0);
}
/*
@@ -519,8 +518,8 @@ static void nbd_clear_req(struct request *req, void *data, bool reserved)
if (!blk_mq_request_started(req))
return;
cmd = blk_mq_rq_to_pdu(req);
- req->errors = -EIO;
- nbd_end_request(cmd);
+ cmd->status = -EIO;
+ blk_mq_complete_request(req, 0);
}
static void nbd_clear_que(struct nbd_device *nbd)
@@ -551,7 +550,7 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
return -EINVAL;
}
- req->errors = 0;
+ cmd->status = 0;
nsock = nbd->socks[index];
mutex_lock(&nsock->tx_lock);
@@ -1037,6 +1036,7 @@ static int nbd_init_request(void *data, struct request *rq,
static const struct blk_mq_ops nbd_mq_ops = {
.queue_rq = nbd_queue_rq,
+ .complete = nbd_complete_rq,
.init_request = nbd_init_request,
.timeout = nbd_xmit_timeout,
};
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 14/25] nbd: don't use req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Add a nbd-specific field instead.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/nbd.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 03ae72985c79..4f045fab9659 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -83,6 +83,7 @@ struct nbd_device {
struct nbd_cmd {
struct nbd_device *nbd;
struct completion send_complete;
+ int status;
};
#if IS_ENABLED(CONFIG_DEBUG_FS)
@@ -152,16 +153,14 @@ static void nbd_size_set(struct nbd_device *nbd, struct block_device *bdev,
nbd_size_update(nbd, bdev);
}
-static void nbd_end_request(struct nbd_cmd *cmd)
+static void nbd_complete_rq(struct request *req)
{
- struct nbd_device *nbd = cmd->nbd;
- struct request *req = blk_mq_rq_from_pdu(cmd);
- int error = req->errors ? -EIO : 0;
+ struct nbd_cmd *cmd = blk_mq_rq_to_pdu(req);
- dev_dbg(nbd_to_dev(nbd), "request %p: %s\n", cmd,
- error ? "failed" : "done");
+ dev_dbg(nbd_to_dev(cmd->nbd), "request %p: %s\n", cmd,
+ cmd->status ? "failed" : "done");
- blk_mq_complete_request(req, error);
+ blk_mq_end_request(req, cmd->status);
}
/*
@@ -193,7 +192,7 @@ static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
dev_err(nbd_to_dev(nbd), "Connection timed out, shutting down connection\n");
set_bit(NBD_TIMEDOUT, &nbd->runtime_flags);
- req->errors = -EIO;
+ cmd->status = -EIO;
mutex_lock(&nbd->config_lock);
sock_shutdown(nbd);
@@ -433,7 +432,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
if (ntohl(reply.error)) {
dev_err(disk_to_dev(nbd->disk), "Other side returned error (%d)\n",
ntohl(reply.error));
- req->errors = -EIO;
+ cmd->status = -EIO;
return cmd;
}
@@ -449,7 +448,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk), "Receive data failed (result %d)\n",
result);
- req->errors = -EIO;
+ cmd->status = -EIO;
return cmd;
}
dev_dbg(nbd_to_dev(nbd), "request %p: got %d bytes data\n",
@@ -499,7 +498,7 @@ static void recv_work(struct work_struct *work)
break;
}
- nbd_end_request(cmd);
+ blk_mq_complete_request(blk_mq_rq_from_pdu(cmd), 0);
}
/*
@@ -519,8 +518,8 @@ static void nbd_clear_req(struct request *req, void *data, bool reserved)
if (!blk_mq_request_started(req))
return;
cmd = blk_mq_rq_to_pdu(req);
- req->errors = -EIO;
- nbd_end_request(cmd);
+ cmd->status = -EIO;
+ blk_mq_complete_request(req, 0);
}
static void nbd_clear_que(struct nbd_device *nbd)
@@ -551,7 +550,7 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
return -EINVAL;
}
- req->errors = 0;
+ cmd->status = 0;
nsock = nbd->socks[index];
mutex_lock(&nsock->tx_lock);
@@ -1037,6 +1036,7 @@ static int nbd_init_request(void *data, struct request *rq,
static const struct blk_mq_ops nbd_mq_ops = {
.queue_rq = nbd_queue_rq,
+ .complete = nbd_complete_rq,
.init_request = nbd_init_request,
.timeout = nbd_xmit_timeout,
};
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 14/25] nbd: don't use req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 21:11 ` Josef Bacik
-1 siblings, 0 replies; 115+ messages in thread
From: Josef Bacik @ 2017-04-06 21:11 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
> On Apr 6, 2017, at 11:39 AM, Christoph Hellwig <hch@lst.de> wrote:
>
> Add a nbd-specific field instead.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
This is fine with me, you can add,
Reviewed-by: Josef Bacik <jbacik@fb.com>
Thanks,
Josef
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 15/25] mtip32xx: add a status field to struct mtip_cmd
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Instead of using req->errors, which will go away.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/mtip32xx/mtip32xx.c | 16 +++++++++-------
drivers/block/mtip32xx/mtip32xx.h | 1 +
2 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 30076e7753bc..ec998e80cfaf 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -241,7 +241,8 @@ static void mtip_async_complete(struct mtip_port *port,
rq = mtip_rq_from_tag(dd, tag);
- blk_mq_complete_request(rq, status);
+ cmd->status = status;
+ blk_mq_complete_request(rq, 0);
}
/*
@@ -2910,18 +2911,19 @@ static void mtip_softirq_done_fn(struct request *rq)
if (unlikely(cmd->unaligned))
up(&dd->port->cmd_slot_unal);
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, cmd->status);
}
static void mtip_abort_cmd(struct request *req, void *data,
bool reserved)
{
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
struct driver_data *dd = data;
dbg_printk(MTIP_DRV_NAME " Aborting request, tag = %d\n", req->tag);
clear_bit(req->tag, dd->port->cmds_to_issue);
- req->errors = -EIO;
+ cmd->status = -EIO;
mtip_softirq_done_fn(req);
}
@@ -3816,7 +3818,6 @@ static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
if (likely(!ret))
return BLK_MQ_RQ_QUEUE_OK;
- rq->errors = ret;
return BLK_MQ_RQ_QUEUE_ERROR;
}
@@ -4107,9 +4108,10 @@ static void mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv)
struct driver_data *dd = (struct driver_data *)data;
struct mtip_cmd *cmd;
- if (likely(!reserv))
- blk_mq_complete_request(rq, -ENODEV);
- else if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &dd->port->flags)) {
+ if (likely(!reserv)) {
+ cmd->status = -ENODEV;
+ blk_mq_complete_request(rq, 0);
+ } else if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &dd->port->flags)) {
cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
if (cmd->comp_func)
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h
index 7617888f7944..57b41528a824 100644
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -352,6 +352,7 @@ struct mtip_cmd {
int retries; /* The number of retries left for this command. */
int direction; /* Data transfer direction */
+ int status;
};
/* Structure used to describe a port. */
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 15/25] mtip32xx: add a status field to struct mtip_cmd
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Instead of using req->errors, which will go away.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/mtip32xx/mtip32xx.c | 16 +++++++++-------
drivers/block/mtip32xx/mtip32xx.h | 1 +
2 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 30076e7753bc..ec998e80cfaf 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -241,7 +241,8 @@ static void mtip_async_complete(struct mtip_port *port,
rq = mtip_rq_from_tag(dd, tag);
- blk_mq_complete_request(rq, status);
+ cmd->status = status;
+ blk_mq_complete_request(rq, 0);
}
/*
@@ -2910,18 +2911,19 @@ static void mtip_softirq_done_fn(struct request *rq)
if (unlikely(cmd->unaligned))
up(&dd->port->cmd_slot_unal);
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, cmd->status);
}
static void mtip_abort_cmd(struct request *req, void *data,
bool reserved)
{
+ struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
struct driver_data *dd = data;
dbg_printk(MTIP_DRV_NAME " Aborting request, tag = %d\n", req->tag);
clear_bit(req->tag, dd->port->cmds_to_issue);
- req->errors = -EIO;
+ cmd->status = -EIO;
mtip_softirq_done_fn(req);
}
@@ -3816,7 +3818,6 @@ static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
if (likely(!ret))
return BLK_MQ_RQ_QUEUE_OK;
- rq->errors = ret;
return BLK_MQ_RQ_QUEUE_ERROR;
}
@@ -4107,9 +4108,10 @@ static void mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv)
struct driver_data *dd = (struct driver_data *)data;
struct mtip_cmd *cmd;
- if (likely(!reserv))
- blk_mq_complete_request(rq, -ENODEV);
- else if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &dd->port->flags)) {
+ if (likely(!reserv)) {
+ cmd->status = -ENODEV;
+ blk_mq_complete_request(rq, 0);
+ } else if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &dd->port->flags)) {
cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
if (cmd->comp_func)
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h
index 7617888f7944..57b41528a824 100644
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -352,6 +352,7 @@ struct mtip_cmd {
int retries; /* The number of retries left for this command. */
int direction; /* Data transfer direction */
+ int status;
};
/* Structure used to describe a port. */
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 16/25] xen-blkfront: don't use req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
xen-blkfron is the last users using rq->errros for passing back error to
blk-mq, and I'd like to get rid of that. In the longer run the driver
should be moving more of the completion processing into .complete, but
this is the minimal change to move forward for now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/xen-blkfront.c | 36 +++++++++++++++++++++++++-----------
1 file changed, 25 insertions(+), 11 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d137ef8a72be..08172f679a64 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -115,6 +115,15 @@ struct split_bio {
atomic_t pending;
};
+struct blkif_req {
+ int error;
+};
+
+static inline struct blkif_req *blkif_req(struct request *rq)
+{
+ return blk_mq_rq_to_pdu(rq);
+}
+
static DEFINE_MUTEX(blkfront_mutex);
static const struct block_device_operations xlvbd_block_fops;
@@ -907,8 +916,14 @@ static int blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
return BLK_MQ_RQ_QUEUE_BUSY;
}
+static void blkif_complete_rq(struct request *rq)
+{
+ blk_mq_end_request(rq, blkif_req(rq)->error);
+}
+
static const struct blk_mq_ops blkfront_mq_ops = {
.queue_rq = blkif_queue_rq,
+ .complete = blkif_complete_rq,
};
static void blkif_set_queue_limits(struct blkfront_info *info)
@@ -969,7 +984,7 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size,
info->tag_set.queue_depth = BLK_RING_SIZE(info);
info->tag_set.numa_node = NUMA_NO_NODE;
info->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE;
- info->tag_set.cmd_size = 0;
+ info->tag_set.cmd_size = sizeof(struct blkif_req);
info->tag_set.driver_data = info;
if (blk_mq_alloc_tag_set(&info->tag_set))
@@ -1543,7 +1558,6 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
unsigned long flags;
struct blkfront_ring_info *rinfo = (struct blkfront_ring_info *)dev_id;
struct blkfront_info *info = rinfo->dev_info;
- int error;
if (unlikely(info->connected != BLKIF_STATE_CONNECTED))
return IRQ_HANDLED;
@@ -1587,37 +1601,36 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
continue;
}
- error = (bret->status == BLKIF_RSP_OKAY) ? 0 : -EIO;
+ blkif_req(req)->error = (bret->status == BLKIF_RSP_OKAY) ? 0 : -EIO;
switch (bret->operation) {
case BLKIF_OP_DISCARD:
if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
struct request_queue *rq = info->rq;
printk(KERN_WARNING "blkfront: %s: %s op failed\n",
info->gd->disk_name, op_name(bret->operation));
- error = -EOPNOTSUPP;
+ blkif_req(req)->error = -EOPNOTSUPP;
info->feature_discard = 0;
info->feature_secdiscard = 0;
queue_flag_clear(QUEUE_FLAG_DISCARD, rq);
queue_flag_clear(QUEUE_FLAG_SECERASE, rq);
}
- blk_mq_complete_request(req, error);
break;
case BLKIF_OP_FLUSH_DISKCACHE:
case BLKIF_OP_WRITE_BARRIER:
if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
printk(KERN_WARNING "blkfront: %s: %s op failed\n",
info->gd->disk_name, op_name(bret->operation));
- error = -EOPNOTSUPP;
+ blkif_req(req)->error = -EOPNOTSUPP;
}
if (unlikely(bret->status == BLKIF_RSP_ERROR &&
rinfo->shadow[id].req.u.rw.nr_segments == 0)) {
printk(KERN_WARNING "blkfront: %s: empty %s op failed\n",
info->gd->disk_name, op_name(bret->operation));
- error = -EOPNOTSUPP;
+ blkif_req(req)->error = -EOPNOTSUPP;
}
- if (unlikely(error)) {
- if (error == -EOPNOTSUPP)
- error = 0;
+ if (unlikely(blkif_req(req)->error)) {
+ if (blkif_req(req)->error == -EOPNOTSUPP)
+ blkif_req(req)->error = 0;
info->feature_fua = 0;
info->feature_flush = 0;
xlvbd_flush(info);
@@ -1629,11 +1642,12 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
dev_dbg(&info->xbdev->dev, "Bad return from blkdev data "
"request: %x\n", bret->status);
- blk_mq_complete_request(req, error);
break;
default:
BUG();
}
+
+ blk_mq_complete_request(req, 0);
}
rinfo->ring.rsp_cons = i;
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 16/25] xen-blkfront: don't use req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
xen-blkfron is the last users using rq->errros for passing back error to
blk-mq, and I'd like to get rid of that. In the longer run the driver
should be moving more of the completion processing into .complete, but
this is the minimal change to move forward for now.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/xen-blkfront.c | 36 +++++++++++++++++++++++++-----------
1 file changed, 25 insertions(+), 11 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d137ef8a72be..08172f679a64 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -115,6 +115,15 @@ struct split_bio {
atomic_t pending;
};
+struct blkif_req {
+ int error;
+};
+
+static inline struct blkif_req *blkif_req(struct request *rq)
+{
+ return blk_mq_rq_to_pdu(rq);
+}
+
static DEFINE_MUTEX(blkfront_mutex);
static const struct block_device_operations xlvbd_block_fops;
@@ -907,8 +916,14 @@ static int blkif_queue_rq(struct blk_mq_hw_ctx *hctx,
return BLK_MQ_RQ_QUEUE_BUSY;
}
+static void blkif_complete_rq(struct request *rq)
+{
+ blk_mq_end_request(rq, blkif_req(rq)->error);
+}
+
static const struct blk_mq_ops blkfront_mq_ops = {
.queue_rq = blkif_queue_rq,
+ .complete = blkif_complete_rq,
};
static void blkif_set_queue_limits(struct blkfront_info *info)
@@ -969,7 +984,7 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size,
info->tag_set.queue_depth = BLK_RING_SIZE(info);
info->tag_set.numa_node = NUMA_NO_NODE;
info->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE;
- info->tag_set.cmd_size = 0;
+ info->tag_set.cmd_size = sizeof(struct blkif_req);
info->tag_set.driver_data = info;
if (blk_mq_alloc_tag_set(&info->tag_set))
@@ -1543,7 +1558,6 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
unsigned long flags;
struct blkfront_ring_info *rinfo = (struct blkfront_ring_info *)dev_id;
struct blkfront_info *info = rinfo->dev_info;
- int error;
if (unlikely(info->connected != BLKIF_STATE_CONNECTED))
return IRQ_HANDLED;
@@ -1587,37 +1601,36 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
continue;
}
- error = (bret->status == BLKIF_RSP_OKAY) ? 0 : -EIO;
+ blkif_req(req)->error = (bret->status == BLKIF_RSP_OKAY) ? 0 : -EIO;
switch (bret->operation) {
case BLKIF_OP_DISCARD:
if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
struct request_queue *rq = info->rq;
printk(KERN_WARNING "blkfront: %s: %s op failed\n",
info->gd->disk_name, op_name(bret->operation));
- error = -EOPNOTSUPP;
+ blkif_req(req)->error = -EOPNOTSUPP;
info->feature_discard = 0;
info->feature_secdiscard = 0;
queue_flag_clear(QUEUE_FLAG_DISCARD, rq);
queue_flag_clear(QUEUE_FLAG_SECERASE, rq);
}
- blk_mq_complete_request(req, error);
break;
case BLKIF_OP_FLUSH_DISKCACHE:
case BLKIF_OP_WRITE_BARRIER:
if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
printk(KERN_WARNING "blkfront: %s: %s op failed\n",
info->gd->disk_name, op_name(bret->operation));
- error = -EOPNOTSUPP;
+ blkif_req(req)->error = -EOPNOTSUPP;
}
if (unlikely(bret->status == BLKIF_RSP_ERROR &&
rinfo->shadow[id].req.u.rw.nr_segments == 0)) {
printk(KERN_WARNING "blkfront: %s: empty %s op failed\n",
info->gd->disk_name, op_name(bret->operation));
- error = -EOPNOTSUPP;
+ blkif_req(req)->error = -EOPNOTSUPP;
}
- if (unlikely(error)) {
- if (error == -EOPNOTSUPP)
- error = 0;
+ if (unlikely(blkif_req(req)->error)) {
+ if (blkif_req(req)->error == -EOPNOTSUPP)
+ blkif_req(req)->error = 0;
info->feature_fua = 0;
info->feature_flush = 0;
xlvbd_flush(info);
@@ -1629,11 +1642,12 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
dev_dbg(&info->xbdev->dev, "Bad return from blkdev data "
"request: %x\n", bret->status);
- blk_mq_complete_request(req, error);
break;
default:
BUG();
}
+
+ blk_mq_complete_request(req, 0);
}
rinfo->ring.rsp_cons = i;
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 16/25] xen-blkfront: don't use req->errors
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-18 15:00 ` Roger Pau Monné
-1 siblings, 0 replies; 115+ messages in thread
From: Roger Pau Monné @ 2017-04-18 15:00 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:35PM +0200, Christoph Hellwig wrote:
> xen-blkfron is the last users using rq->errros for passing back error to
> blk-mq, and I'd like to get rid of that. In the longer run the driver
> should be moving more of the completion processing into .complete, but
> this is the minimal change to move forward for now.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Roger Pau Monn� <roger.pau@citrix.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 16/25] xen-blkfront: don't use req->errors
@ 2017-04-18 15:00 ` Roger Pau Monné
0 siblings, 0 replies; 115+ messages in thread
From: Roger Pau Monné @ 2017-04-18 15:00 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:35PM +0200, Christoph Hellwig wrote:
> xen-blkfron is the last users using rq->errros for passing back error to
> blk-mq, and I'd like to get rid of that. In the longer run the driver
> should be moving more of the completion processing into .complete, but
> this is the minimal change to move forward for now.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
Acked-by: Roger Pau Monn? <roger.pau at citrix.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 16/25] xen-blkfront: don't use req->errors
@ 2017-04-18 15:00 ` Roger Pau Monné
0 siblings, 0 replies; 115+ messages in thread
From: Roger Pau Monné @ 2017-04-18 15:00 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:35PM +0200, Christoph Hellwig wrote:
> xen-blkfron is the last users using rq->errros for passing back error to
> blk-mq, and I'd like to get rid of that. In the longer run the driver
> should be moving more of the completion processing into .complete, but
> this is the minimal change to move forward for now.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 16/25] xen-blkfront: don't use req->errors
2017-04-18 15:00 ` Roger Pau Monné
(?)
@ 2017-04-18 15:05 ` Konrad Rzeszutek Wilk
-1 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-18 15:05 UTC (permalink / raw)
To: Roger Pau Monné
Cc: Christoph Hellwig, Jens Axboe, Josef Bacik, James Smart,
linux-scsi, linux-nvme, linux-block, dm-devel
On Tue, Apr 18, 2017 at 04:00:51PM +0100, Roger Pau Monn=E9 wrote:
> On Thu, Apr 06, 2017 at 05:39:35PM +0200, Christoph Hellwig wrote:
> > xen-blkfron is the last users using rq->errros for passing back error=
to
> > blk-mq, and I'd like to get rid of that. In the longer run the drive=
r
> > should be moving more of the completion processing into .complete, bu=
t
> > this is the minimal change to move forward for now.
> >=20
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
>=20
> Acked-by: Roger Pau Monn=E9 <roger.pau@citrix.com>
>=20
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Thanks!
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 16/25] xen-blkfront: don't use req->errors
@ 2017-04-18 15:05 ` Konrad Rzeszutek Wilk
0 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-18 15:05 UTC (permalink / raw)
On Tue, Apr 18, 2017@04:00:51PM +0100, Roger Pau Monn? wrote:
> On Thu, Apr 06, 2017@05:39:35PM +0200, Christoph Hellwig wrote:
> > xen-blkfron is the last users using rq->errros for passing back error to
> > blk-mq, and I'd like to get rid of that. In the longer run the driver
> > should be moving more of the completion processing into .complete, but
> > this is the minimal change to move forward for now.
> >
> > Signed-off-by: Christoph Hellwig <hch at lst.de>
>
> Acked-by: Roger Pau Monn? <roger.pau at citrix.com>
>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
Thanks!
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 16/25] xen-blkfront: don't use req->errors
@ 2017-04-18 15:05 ` Konrad Rzeszutek Wilk
0 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-18 15:05 UTC (permalink / raw)
To: Roger Pau Monné
Cc: Christoph Hellwig, Jens Axboe, Josef Bacik, James Smart,
linux-scsi, linux-nvme, linux-block, dm-devel
On Tue, Apr 18, 2017 at 04:00:51PM +0100, Roger Pau Monné wrote:
> On Thu, Apr 06, 2017 at 05:39:35PM +0200, Christoph Hellwig wrote:
> > xen-blkfron is the last users using rq->errros for passing back error to
> > blk-mq, and I'd like to get rid of that. In the longer run the driver
> > should be moving more of the completion processing into .complete, but
> > this is the minimal change to move forward for now.
> >
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
>
> Acked-by: Roger Pau Monné <roger.pau@citrix.com>
>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Thanks!
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Now that we always have a ->complete callback we can remove the direct
call to blk_mq_end_request, as well as the error argument to
blk_mq_complete_request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-mq.c | 14 +++-----------
drivers/block/loop.c | 4 ++--
drivers/block/mtip32xx/mtip32xx.c | 4 ++--
drivers/block/nbd.c | 4 ++--
drivers/block/null_blk.c | 2 +-
drivers/block/virtio_blk.c | 2 +-
drivers/block/xen-blkfront.c | 2 +-
drivers/md/dm-rq.c | 2 +-
drivers/nvme/host/core.c | 2 +-
drivers/nvme/host/nvme.h | 2 +-
drivers/scsi/scsi_lib.c | 2 +-
include/linux/blk-mq.h | 2 +-
12 files changed, 17 insertions(+), 25 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index f7cd3208bcdf..393f350ebb90 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -441,14 +441,8 @@ static void blk_mq_stat_add(struct request *rq)
static void __blk_mq_complete_request(struct request *rq)
{
- struct request_queue *q = rq->q;
-
blk_mq_stat_add(rq);
-
- if (!q->softirq_done_fn)
- blk_mq_end_request(rq, rq->errors);
- else
- blk_mq_ipi_complete_request(rq);
+ blk_mq_ipi_complete_request(rq);
}
/**
@@ -459,16 +453,14 @@ static void __blk_mq_complete_request(struct request *rq)
* Ends all I/O on a request. It does not handle partial completions.
* The actual completion happens out-of-order, through a IPI handler.
**/
-void blk_mq_complete_request(struct request *rq, int error)
+void blk_mq_complete_request(struct request *rq)
{
struct request_queue *q = rq->q;
if (unlikely(blk_should_fake_timeout(q)))
return;
- if (!blk_mark_rq_complete(rq)) {
- rq->errors = error;
+ if (!blk_mark_rq_complete(rq))
__blk_mq_complete_request(rq);
- }
}
EXPORT_SYMBOL(blk_mq_complete_request);
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 6924ec611a49..7d49d919543a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -465,7 +465,7 @@ static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
struct loop_cmd *cmd = container_of(iocb, struct loop_cmd, iocb);
cmd->ret = ret;
- blk_mq_complete_request(cmd->rq, 0);
+ blk_mq_complete_request(cmd->rq);
}
static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
@@ -1683,7 +1683,7 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
/* complete non-aio request */
if (!cmd->use_aio || ret) {
cmd->ret = ret ? -EIO : 0;
- blk_mq_complete_request(cmd->rq, 0);
+ blk_mq_complete_request(cmd->rq);
}
}
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index ec998e80cfaf..be6bbe5ce613 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -242,7 +242,7 @@ static void mtip_async_complete(struct mtip_port *port,
rq = mtip_rq_from_tag(dd, tag);
cmd->status = status;
- blk_mq_complete_request(rq, 0);
+ blk_mq_complete_request(rq);
}
/*
@@ -4110,7 +4110,7 @@ static void mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv)
if (likely(!reserv)) {
cmd->status = -ENODEV;
- blk_mq_complete_request(rq, 0);
+ blk_mq_complete_request(rq);
} else if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &dd->port->flags)) {
cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 4f045fab9659..4f78c5a01d11 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -498,7 +498,7 @@ static void recv_work(struct work_struct *work)
break;
}
- blk_mq_complete_request(blk_mq_rq_from_pdu(cmd), 0);
+ blk_mq_complete_request(blk_mq_rq_from_pdu(cmd));
}
/*
@@ -519,7 +519,7 @@ static void nbd_clear_req(struct request *req, void *data, bool reserved)
return;
cmd = blk_mq_rq_to_pdu(req);
cmd->status = -EIO;
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
static void nbd_clear_que(struct nbd_device *nbd)
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index 24ca85a70fd8..c27cccec368b 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -281,7 +281,7 @@ static inline void null_handle_cmd(struct nullb_cmd *cmd)
case NULL_IRQ_SOFTIRQ:
switch (queue_mode) {
case NULL_Q_MQ:
- blk_mq_complete_request(cmd->rq, 0);
+ blk_mq_complete_request(cmd->rq);
break;
case NULL_Q_RQ:
blk_complete_request(cmd->rq);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index dea2a58d6734..f94614257462 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -201,7 +201,7 @@ static void virtblk_done(struct virtqueue *vq)
while ((vbr = virtqueue_get_buf(vblk->vqs[qid].vq, &len)) != NULL) {
struct request *req = blk_mq_rq_from_pdu(vbr);
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
req_done = true;
}
if (unlikely(virtqueue_is_broken(vq)))
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 08172f679a64..ae47f7f7cd10 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1647,7 +1647,7 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
BUG();
}
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
rinfo->ring.rsp_cons = i;
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index e1cea42ec2a6..18d0bb305930 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -358,7 +358,7 @@ static void dm_complete_request(struct request *rq, int error)
if (!rq->q->mq_ops)
blk_complete_request(rq);
else
- blk_mq_complete_request(rq, 0);
+ blk_mq_complete_request(rq);
}
/*
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index fbc7d64b6f10..9bf758e3c911 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -117,7 +117,7 @@ void nvme_cancel_request(struct request *req, void *data, bool reserved)
if (blk_queue_dying(req->q))
status |= NVME_SC_DNR;
nvme_req(req)->status = status;
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
EXPORT_SYMBOL_GPL(nvme_cancel_request);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 4dc930d3545d..72dc98f6a6c6 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -251,7 +251,7 @@ static inline void nvme_end_request(struct request *req, __le16 status,
rq->status = le16_to_cpu(status) >> 1;
rq->result = result;
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
void nvme_complete_rq(struct request *req);
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 8c7652f04900..2e84515674bb 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1887,7 +1887,7 @@ static int scsi_mq_prep_fn(struct request *req)
static void scsi_mq_done(struct scsi_cmnd *cmd)
{
trace_scsi_dispatch_cmd_done(cmd);
- blk_mq_complete_request(cmd->request, 0);
+ blk_mq_complete_request(cmd->request);
}
static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index bdea90d75274..05c551e22eec 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -227,7 +227,7 @@ void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
void blk_mq_kick_requeue_list(struct request_queue *q);
void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs);
void blk_mq_abort_requeue_list(struct request_queue *q);
-void blk_mq_complete_request(struct request *rq, int error);
+void blk_mq_complete_request(struct request *rq);
bool blk_mq_queue_stopped(struct request_queue *q);
void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Now that we always have a ->complete callback we can remove the direct
call to blk_mq_end_request, as well as the error argument to
blk_mq_complete_request.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
block/blk-mq.c | 14 +++-----------
drivers/block/loop.c | 4 ++--
drivers/block/mtip32xx/mtip32xx.c | 4 ++--
drivers/block/nbd.c | 4 ++--
drivers/block/null_blk.c | 2 +-
drivers/block/virtio_blk.c | 2 +-
drivers/block/xen-blkfront.c | 2 +-
drivers/md/dm-rq.c | 2 +-
drivers/nvme/host/core.c | 2 +-
drivers/nvme/host/nvme.h | 2 +-
drivers/scsi/scsi_lib.c | 2 +-
include/linux/blk-mq.h | 2 +-
12 files changed, 17 insertions(+), 25 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index f7cd3208bcdf..393f350ebb90 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -441,14 +441,8 @@ static void blk_mq_stat_add(struct request *rq)
static void __blk_mq_complete_request(struct request *rq)
{
- struct request_queue *q = rq->q;
-
blk_mq_stat_add(rq);
-
- if (!q->softirq_done_fn)
- blk_mq_end_request(rq, rq->errors);
- else
- blk_mq_ipi_complete_request(rq);
+ blk_mq_ipi_complete_request(rq);
}
/**
@@ -459,16 +453,14 @@ static void __blk_mq_complete_request(struct request *rq)
* Ends all I/O on a request. It does not handle partial completions.
* The actual completion happens out-of-order, through a IPI handler.
**/
-void blk_mq_complete_request(struct request *rq, int error)
+void blk_mq_complete_request(struct request *rq)
{
struct request_queue *q = rq->q;
if (unlikely(blk_should_fake_timeout(q)))
return;
- if (!blk_mark_rq_complete(rq)) {
- rq->errors = error;
+ if (!blk_mark_rq_complete(rq))
__blk_mq_complete_request(rq);
- }
}
EXPORT_SYMBOL(blk_mq_complete_request);
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 6924ec611a49..7d49d919543a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -465,7 +465,7 @@ static void lo_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
struct loop_cmd *cmd = container_of(iocb, struct loop_cmd, iocb);
cmd->ret = ret;
- blk_mq_complete_request(cmd->rq, 0);
+ blk_mq_complete_request(cmd->rq);
}
static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
@@ -1683,7 +1683,7 @@ static void loop_handle_cmd(struct loop_cmd *cmd)
/* complete non-aio request */
if (!cmd->use_aio || ret) {
cmd->ret = ret ? -EIO : 0;
- blk_mq_complete_request(cmd->rq, 0);
+ blk_mq_complete_request(cmd->rq);
}
}
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index ec998e80cfaf..be6bbe5ce613 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -242,7 +242,7 @@ static void mtip_async_complete(struct mtip_port *port,
rq = mtip_rq_from_tag(dd, tag);
cmd->status = status;
- blk_mq_complete_request(rq, 0);
+ blk_mq_complete_request(rq);
}
/*
@@ -4110,7 +4110,7 @@ static void mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv)
if (likely(!reserv)) {
cmd->status = -ENODEV;
- blk_mq_complete_request(rq, 0);
+ blk_mq_complete_request(rq);
} else if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &dd->port->flags)) {
cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 4f045fab9659..4f78c5a01d11 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -498,7 +498,7 @@ static void recv_work(struct work_struct *work)
break;
}
- blk_mq_complete_request(blk_mq_rq_from_pdu(cmd), 0);
+ blk_mq_complete_request(blk_mq_rq_from_pdu(cmd));
}
/*
@@ -519,7 +519,7 @@ static void nbd_clear_req(struct request *req, void *data, bool reserved)
return;
cmd = blk_mq_rq_to_pdu(req);
cmd->status = -EIO;
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
static void nbd_clear_que(struct nbd_device *nbd)
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index 24ca85a70fd8..c27cccec368b 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -281,7 +281,7 @@ static inline void null_handle_cmd(struct nullb_cmd *cmd)
case NULL_IRQ_SOFTIRQ:
switch (queue_mode) {
case NULL_Q_MQ:
- blk_mq_complete_request(cmd->rq, 0);
+ blk_mq_complete_request(cmd->rq);
break;
case NULL_Q_RQ:
blk_complete_request(cmd->rq);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index dea2a58d6734..f94614257462 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -201,7 +201,7 @@ static void virtblk_done(struct virtqueue *vq)
while ((vbr = virtqueue_get_buf(vblk->vqs[qid].vq, &len)) != NULL) {
struct request *req = blk_mq_rq_from_pdu(vbr);
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
req_done = true;
}
if (unlikely(virtqueue_is_broken(vq)))
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 08172f679a64..ae47f7f7cd10 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1647,7 +1647,7 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
BUG();
}
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
rinfo->ring.rsp_cons = i;
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index e1cea42ec2a6..18d0bb305930 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -358,7 +358,7 @@ static void dm_complete_request(struct request *rq, int error)
if (!rq->q->mq_ops)
blk_complete_request(rq);
else
- blk_mq_complete_request(rq, 0);
+ blk_mq_complete_request(rq);
}
/*
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index fbc7d64b6f10..9bf758e3c911 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -117,7 +117,7 @@ void nvme_cancel_request(struct request *req, void *data, bool reserved)
if (blk_queue_dying(req->q))
status |= NVME_SC_DNR;
nvme_req(req)->status = status;
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
EXPORT_SYMBOL_GPL(nvme_cancel_request);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 4dc930d3545d..72dc98f6a6c6 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -251,7 +251,7 @@ static inline void nvme_end_request(struct request *req, __le16 status,
rq->status = le16_to_cpu(status) >> 1;
rq->result = result;
- blk_mq_complete_request(req, 0);
+ blk_mq_complete_request(req);
}
void nvme_complete_rq(struct request *req);
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 8c7652f04900..2e84515674bb 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1887,7 +1887,7 @@ static int scsi_mq_prep_fn(struct request *req)
static void scsi_mq_done(struct scsi_cmnd *cmd)
{
trace_scsi_dispatch_cmd_done(cmd);
- blk_mq_complete_request(cmd->request, 0);
+ blk_mq_complete_request(cmd->request);
}
static int scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index bdea90d75274..05c551e22eec 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -227,7 +227,7 @@ void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
void blk_mq_kick_requeue_list(struct request_queue *q);
void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs);
void blk_mq_abort_requeue_list(struct request_queue *q);
-void blk_mq_complete_request(struct request *rq, int error);
+void blk_mq_complete_request(struct request *rq);
bool blk_mq_queue_stopped(struct request_queue *q);
void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* Re: [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
2017-04-06 15:39 ` Christoph Hellwig
(?)
@ 2017-04-18 15:03 ` Roger Pau Monné
-1 siblings, 0 replies; 115+ messages in thread
From: Roger Pau Monné @ 2017-04-18 15:03 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:36PM +0200, Christoph Hellwig wrote:
> Now that we always have a ->complete callback we can remove the direct
> call to blk_mq_end_request, as well as the error argument to
> blk_mq_complete_request.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
For blkfront:
Acked-by: Roger Pau Monn� <roger.pau@citrix.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
@ 2017-04-18 15:03 ` Roger Pau Monné
0 siblings, 0 replies; 115+ messages in thread
From: Roger Pau Monné @ 2017-04-18 15:03 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:36PM +0200, Christoph Hellwig wrote:
> Now that we always have a ->complete callback we can remove the direct
> call to blk_mq_end_request, as well as the error argument to
> blk_mq_complete_request.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
For blkfront:
Acked-by: Roger Pau Monn? <roger.pau at citrix.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
@ 2017-04-18 15:03 ` Roger Pau Monné
0 siblings, 0 replies; 115+ messages in thread
From: Roger Pau Monné @ 2017-04-18 15:03 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:36PM +0200, Christoph Hellwig wrote:
> Now that we always have a ->complete callback we can remove the direct
> call to blk_mq_end_request, as well as the error argument to
> blk_mq_complete_request.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
For blkfront:
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
2017-04-18 15:03 ` Roger Pau Monné
(?)
@ 2017-04-18 15:06 ` Konrad Rzeszutek Wilk
-1 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-18 15:06 UTC (permalink / raw)
To: Roger Pau Monné
Cc: Christoph Hellwig, Jens Axboe, Josef Bacik, James Smart,
linux-scsi, linux-nvme, linux-block, dm-devel
On Tue, Apr 18, 2017 at 04:03:21PM +0100, Roger Pau Monn=E9 wrote:
> On Thu, Apr 06, 2017 at 05:39:36PM +0200, Christoph Hellwig wrote:
> > Now that we always have a ->complete callback we can remove the direc=
t
> > call to blk_mq_end_request, as well as the error argument to
> > blk_mq_complete_request.
> >=20
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
>=20
> For blkfront:
>=20
> Acked-by: Roger Pau Monn=E9 <roger.pau@citrix.com>
>=20
And also
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
@ 2017-04-18 15:06 ` Konrad Rzeszutek Wilk
0 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-18 15:06 UTC (permalink / raw)
On Tue, Apr 18, 2017@04:03:21PM +0100, Roger Pau Monn? wrote:
> On Thu, Apr 06, 2017@05:39:36PM +0200, Christoph Hellwig wrote:
> > Now that we always have a ->complete callback we can remove the direct
> > call to blk_mq_end_request, as well as the error argument to
> > blk_mq_complete_request.
> >
> > Signed-off-by: Christoph Hellwig <hch at lst.de>
>
> For blkfront:
>
> Acked-by: Roger Pau Monn? <roger.pau at citrix.com>
>
And also
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: [PATCH 17/25] blk-mq: remove the error argument to blk_mq_complete_request
@ 2017-04-18 15:06 ` Konrad Rzeszutek Wilk
0 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-18 15:06 UTC (permalink / raw)
To: Roger Pau Monné
Cc: Christoph Hellwig, Jens Axboe, Josef Bacik, James Smart,
linux-scsi, linux-nvme, linux-block, dm-devel
On Tue, Apr 18, 2017 at 04:03:21PM +0100, Roger Pau Monné wrote:
> On Thu, Apr 06, 2017 at 05:39:36PM +0200, Christoph Hellwig wrote:
> > Now that we always have a ->complete callback we can remove the direct
> > call to blk_mq_end_request, as well as the error argument to
> > blk_mq_complete_request.
> >
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
>
> For blkfront:
>
> Acked-by: Roger Pau Monné <roger.pau@citrix.com>
>
And also
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
^ permalink raw reply [flat|nested] 115+ messages in thread
* [PATCH 18/25] blk-mq: simplify __blk_mq_complete_request
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Merge blk_mq_ipi_complete_request and blk_mq_stat_add into their only
caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-mq.c | 21 ++++++---------------
1 file changed, 6 insertions(+), 15 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 393f350ebb90..a6e14a3c87ce 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -405,12 +405,17 @@ static void __blk_mq_complete_request_remote(void *data)
rq->q->softirq_done_fn(rq);
}
-static void blk_mq_ipi_complete_request(struct request *rq)
+static void __blk_mq_complete_request(struct request *rq)
{
struct blk_mq_ctx *ctx = rq->mq_ctx;
bool shared = false;
int cpu;
+ if (rq->rq_flags & RQF_STATS) {
+ blk_mq_poll_stats_start(rq->q);
+ blk_stat_add(rq);
+ }
+
if (!test_bit(QUEUE_FLAG_SAME_COMP, &rq->q->queue_flags)) {
rq->q->softirq_done_fn(rq);
return;
@@ -431,20 +436,6 @@ static void blk_mq_ipi_complete_request(struct request *rq)
put_cpu();
}
-static void blk_mq_stat_add(struct request *rq)
-{
- if (rq->rq_flags & RQF_STATS) {
- blk_mq_poll_stats_start(rq->q);
- blk_stat_add(rq);
- }
-}
-
-static void __blk_mq_complete_request(struct request *rq)
-{
- blk_mq_stat_add(rq);
- blk_mq_ipi_complete_request(rq);
-}
-
/**
* blk_mq_complete_request - end I/O on a request
* @rq: the request being processed
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 18/25] blk-mq: simplify __blk_mq_complete_request
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Merge blk_mq_ipi_complete_request and blk_mq_stat_add into their only
caller.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
block/blk-mq.c | 21 ++++++---------------
1 file changed, 6 insertions(+), 15 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 393f350ebb90..a6e14a3c87ce 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -405,12 +405,17 @@ static void __blk_mq_complete_request_remote(void *data)
rq->q->softirq_done_fn(rq);
}
-static void blk_mq_ipi_complete_request(struct request *rq)
+static void __blk_mq_complete_request(struct request *rq)
{
struct blk_mq_ctx *ctx = rq->mq_ctx;
bool shared = false;
int cpu;
+ if (rq->rq_flags & RQF_STATS) {
+ blk_mq_poll_stats_start(rq->q);
+ blk_stat_add(rq);
+ }
+
if (!test_bit(QUEUE_FLAG_SAME_COMP, &rq->q->queue_flags)) {
rq->q->softirq_done_fn(rq);
return;
@@ -431,20 +436,6 @@ static void blk_mq_ipi_complete_request(struct request *rq)
put_cpu();
}
-static void blk_mq_stat_add(struct request *rq)
-{
- if (rq->rq_flags & RQF_STATS) {
- blk_mq_poll_stats_start(rq->q);
- blk_stat_add(rq);
- }
-}
-
-static void __blk_mq_complete_request(struct request *rq)
-{
- blk_mq_stat_add(rq);
- blk_mq_ipi_complete_request(rq);
-}
-
/**
* blk_mq_complete_request - end I/O on a request
* @rq: the request being processed
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 19/25] block: add a error_count field to struct request
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
This is for the legacy floppy and ataflop drivers that currently abuse
->errors for this purpose. It's stashed away in a union to not grow
the struct size, the other fields are either used by modern drivers
for different purposes or the I/O scheduler before queing the I/O
to drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/blkdev.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a03acd92ae74..fa75401ea5cc 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -175,6 +175,7 @@ struct request {
struct rb_node rb_node; /* sort/lookup */
struct bio_vec special_vec;
void *completion_data;
+ int error_count; /* for legacy drivers, don't use */
};
/*
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 19/25] block: add a error_count field to struct request
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
This is for the legacy floppy and ataflop drivers that currently abuse
->errors for this purpose. It's stashed away in a union to not grow
the struct size, the other fields are either used by modern drivers
for different purposes or the I/O scheduler before queing the I/O
to drivers.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
include/linux/blkdev.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a03acd92ae74..fa75401ea5cc 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -175,6 +175,7 @@ struct request {
struct rb_node rb_node; /* sort/lookup */
struct bio_vec special_vec;
void *completion_data;
+ int error_count; /* for legacy drivers, don't use */
};
/*
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 20/25] floppy: switch from req->errors to req->error_count
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/floppy.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index ce102ec47ef2..60d4c7653178 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -2805,8 +2805,10 @@ static int set_next_request(void)
fdc_queue = 0;
if (q) {
current_req = blk_fetch_request(q);
- if (current_req)
+ if (current_req) {
+ current_req->error_count = 0;
break;
+ }
}
} while (fdc_queue != old_pos);
@@ -2866,7 +2868,7 @@ static void redo_fd_request(void)
_floppy = floppy_type + DP->autodetect[DRS->probed_format];
} else
probing = 0;
- errors = &(current_req->errors);
+ errors = &(current_req->error_count);
tmp = make_raw_rw_request();
if (tmp < 2) {
request_done(tmp);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 20/25] floppy: switch from req->errors to req->error_count
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/floppy.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index ce102ec47ef2..60d4c7653178 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -2805,8 +2805,10 @@ static int set_next_request(void)
fdc_queue = 0;
if (q) {
current_req = blk_fetch_request(q);
- if (current_req)
+ if (current_req) {
+ current_req->error_count = 0;
break;
+ }
}
} while (fdc_queue != old_pos);
@@ -2866,7 +2868,7 @@ static void redo_fd_request(void)
_floppy = floppy_type + DP->autodetect[DRS->probed_format];
} else
probing = 0;
- errors = &(current_req->errors);
+ errors = &(current_req->error_count);
tmp = make_raw_rw_request();
if (tmp < 2) {
request_done(tmp);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 21/25] ataflop: switch from req->errors to req->error_count
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/ataflop.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 2104b1b4ccda..fa69ecd52cb5 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -617,12 +617,12 @@ static void fd_error( void )
if (!fd_request)
return;
- fd_request->errors++;
- if (fd_request->errors >= MAX_ERRORS) {
+ fd_request->error_count++;
+ if (fd_request->error_count >= MAX_ERRORS) {
printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive );
fd_end_request_cur(-EIO);
}
- else if (fd_request->errors == RECALIBRATE_ERRORS) {
+ else if (fd_request->error_count == RECALIBRATE_ERRORS) {
printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive );
if (SelectedDrive != -1)
SUD.track = -1;
@@ -1386,7 +1386,7 @@ static void setup_req_params( int drive )
ReqData = ReqBuffer + 512 * ReqCnt;
if (UseTrackbuffer)
- read_track = (ReqCmd == READ && fd_request->errors == 0);
+ read_track = (ReqCmd == READ && fd_request->error_count == 0);
else
read_track = 0;
@@ -1409,8 +1409,10 @@ static struct request *set_next_request(void)
fdc_queue = 0;
if (q) {
rq = blk_fetch_request(q);
- if (rq)
+ if (rq) {
+ rq->error_count = 0;
break;
+ }
}
} while (fdc_queue != old_pos);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 21/25] ataflop: switch from req->errors to req->error_count
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/ataflop.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 2104b1b4ccda..fa69ecd52cb5 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -617,12 +617,12 @@ static void fd_error( void )
if (!fd_request)
return;
- fd_request->errors++;
- if (fd_request->errors >= MAX_ERRORS) {
+ fd_request->error_count++;
+ if (fd_request->error_count >= MAX_ERRORS) {
printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive );
fd_end_request_cur(-EIO);
}
- else if (fd_request->errors == RECALIBRATE_ERRORS) {
+ else if (fd_request->error_count == RECALIBRATE_ERRORS) {
printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive );
if (SelectedDrive != -1)
SUD.track = -1;
@@ -1386,7 +1386,7 @@ static void setup_req_params( int drive )
ReqData = ReqBuffer + 512 * ReqCnt;
if (UseTrackbuffer)
- read_track = (ReqCmd == READ && fd_request->errors == 0);
+ read_track = (ReqCmd == READ && fd_request->error_count == 0);
else
read_track = 0;
@@ -1409,8 +1409,10 @@ static struct request *set_next_request(void)
fdc_queue = 0;
if (q) {
rq = blk_fetch_request(q);
- if (rq)
+ if (rq) {
+ rq->error_count = 0;
break;
+ }
}
} while (fdc_queue != old_pos);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 22/25] swim3: remove (commented out) printing of req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/swim3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 61b3ffa4f458..ba4809c9bdba 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -343,8 +343,8 @@ static void start_request(struct floppy_state *fs)
req->rq_disk->disk_name, req->cmd,
(long)blk_rq_pos(req), blk_rq_sectors(req),
bio_data(req->bio));
- swim3_dbg(" errors=%d current_nr_sectors=%u\n",
- req->errors, blk_rq_cur_sectors(req));
+ swim3_dbg(" current_nr_sectors=%u\n",
+ blk_rq_cur_sectors(req));
#endif
if (blk_rq_pos(req) >= fs->total_secs) {
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 22/25] swim3: remove (commented out) printing of req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/swim3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 61b3ffa4f458..ba4809c9bdba 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -343,8 +343,8 @@ static void start_request(struct floppy_state *fs)
req->rq_disk->disk_name, req->cmd,
(long)blk_rq_pos(req), blk_rq_sectors(req),
bio_data(req->bio));
- swim3_dbg(" errors=%d current_nr_sectors=%u\n",
- req->errors, blk_rq_cur_sectors(req));
+ swim3_dbg(" current_nr_sectors=%u\n",
+ blk_rq_cur_sectors(req));
#endif
if (blk_rq_pos(req) >= fs->total_secs) {
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 23/25] pd: remove bogus check for req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
The driver never sets req->errors
---
drivers/block/paride/pd.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index 82c6d02193ae..3b0ab214fe74 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -739,7 +739,6 @@ static int pd_special_command(struct pd_unit *disk,
enum action (*func)(struct pd_unit *disk))
{
struct request *rq;
- int err = 0;
rq = blk_get_request(disk->gd->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
if (IS_ERR(rq))
@@ -748,10 +747,9 @@ static int pd_special_command(struct pd_unit *disk,
rq->special = func;
blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);
- err = req->errors ? -EIO : 0;
blk_put_request(rq);
- return err;
+ return 0;
}
/* kernel glue structures */
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 23/25] pd: remove bogus check for req->errors
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
The driver never sets req->errors
---
drivers/block/paride/pd.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index 82c6d02193ae..3b0ab214fe74 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -739,7 +739,6 @@ static int pd_special_command(struct pd_unit *disk,
enum action (*func)(struct pd_unit *disk))
{
struct request *rq;
- int err = 0;
rq = blk_get_request(disk->gd->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
if (IS_ERR(rq))
@@ -748,10 +747,9 @@ static int pd_special_command(struct pd_unit *disk,
rq->special = func;
blk_execute_rq(disk->gd->queue, disk->gd, rq, 0);
- err = req->errors ? -EIO : 0;
blk_put_request(rq);
- return err;
+ return 0;
}
/* kernel glue structures */
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 24/25] blktrace: remove the unused block_rq_abort tracepoint
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/trace/events/block.h | 44 ++++++++++----------------------------------
kernel/trace/blktrace.c | 9 ---------
2 files changed, 10 insertions(+), 43 deletions(-)
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index a88ed13446ff..99ed69fad041 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -61,7 +61,16 @@ DEFINE_EVENT(block_buffer, block_dirty_buffer,
TP_ARGS(bh)
);
-DECLARE_EVENT_CLASS(block_rq_with_error,
+/**
+ * block_rq_requeue - place block IO request back on a queue
+ * @q: queue holding operation
+ * @rq: block IO operation request
+ *
+ * The block operation request @rq is being placed back into queue
+ * @q. For some reason the request was not completed and needs to be
+ * put back in the queue.
+ */
+TRACE_EVENT(block_rq_requeue,
TP_PROTO(struct request_queue *q, struct request *rq),
@@ -94,39 +103,6 @@ DECLARE_EVENT_CLASS(block_rq_with_error,
);
/**
- * block_rq_abort - abort block operation request
- * @q: queue containing the block operation request
- * @rq: block IO operation request
- *
- * Called immediately after pending block IO operation request @rq in
- * queue @q is aborted. The fields in the operation request @rq
- * can be examined to determine which device and sectors the pending
- * operation would access.
- */
-DEFINE_EVENT(block_rq_with_error, block_rq_abort,
-
- TP_PROTO(struct request_queue *q, struct request *rq),
-
- TP_ARGS(q, rq)
-);
-
-/**
- * block_rq_requeue - place block IO request back on a queue
- * @q: queue holding operation
- * @rq: block IO operation request
- *
- * The block operation request @rq is being placed back into queue
- * @q. For some reason the request was not completed and needs to be
- * put back in the queue.
- */
-DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
-
- TP_PROTO(struct request_queue *q, struct request *rq),
-
- TP_ARGS(q, rq)
-);
-
-/**
* block_rq_complete - block IO operation completed by device driver
* @q: queue containing the block operation request
* @rq: block operations request
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index b2058a7f94bd..9f3624dadb09 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -716,12 +716,6 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
rq->cmd_flags, what, rq->errors, 0, NULL);
}
-static void blk_add_trace_rq_abort(void *ignore,
- struct request_queue *q, struct request *rq)
-{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_ABORT);
-}
-
static void blk_add_trace_rq_insert(void *ignore,
struct request_queue *q, struct request *rq)
{
@@ -974,8 +968,6 @@ static void blk_register_tracepoints(void)
{
int ret;
- ret = register_trace_block_rq_abort(blk_add_trace_rq_abort, NULL);
- WARN_ON(ret);
ret = register_trace_block_rq_insert(blk_add_trace_rq_insert, NULL);
WARN_ON(ret);
ret = register_trace_block_rq_issue(blk_add_trace_rq_issue, NULL);
@@ -1028,7 +1020,6 @@ static void blk_unregister_tracepoints(void)
unregister_trace_block_rq_requeue(blk_add_trace_rq_requeue, NULL);
unregister_trace_block_rq_issue(blk_add_trace_rq_issue, NULL);
unregister_trace_block_rq_insert(blk_add_trace_rq_insert, NULL);
- unregister_trace_block_rq_abort(blk_add_trace_rq_abort, NULL);
tracepoint_synchronize_unregister();
}
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 24/25] blktrace: remove the unused block_rq_abort tracepoint
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
include/trace/events/block.h | 44 ++++++++++----------------------------------
kernel/trace/blktrace.c | 9 ---------
2 files changed, 10 insertions(+), 43 deletions(-)
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index a88ed13446ff..99ed69fad041 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -61,7 +61,16 @@ DEFINE_EVENT(block_buffer, block_dirty_buffer,
TP_ARGS(bh)
);
-DECLARE_EVENT_CLASS(block_rq_with_error,
+/**
+ * block_rq_requeue - place block IO request back on a queue
+ * @q: queue holding operation
+ * @rq: block IO operation request
+ *
+ * The block operation request @rq is being placed back into queue
+ * @q. For some reason the request was not completed and needs to be
+ * put back in the queue.
+ */
+TRACE_EVENT(block_rq_requeue,
TP_PROTO(struct request_queue *q, struct request *rq),
@@ -94,39 +103,6 @@ DECLARE_EVENT_CLASS(block_rq_with_error,
);
/**
- * block_rq_abort - abort block operation request
- * @q: queue containing the block operation request
- * @rq: block IO operation request
- *
- * Called immediately after pending block IO operation request @rq in
- * queue @q is aborted. The fields in the operation request @rq
- * can be examined to determine which device and sectors the pending
- * operation would access.
- */
-DEFINE_EVENT(block_rq_with_error, block_rq_abort,
-
- TP_PROTO(struct request_queue *q, struct request *rq),
-
- TP_ARGS(q, rq)
-);
-
-/**
- * block_rq_requeue - place block IO request back on a queue
- * @q: queue holding operation
- * @rq: block IO operation request
- *
- * The block operation request @rq is being placed back into queue
- * @q. For some reason the request was not completed and needs to be
- * put back in the queue.
- */
-DEFINE_EVENT(block_rq_with_error, block_rq_requeue,
-
- TP_PROTO(struct request_queue *q, struct request *rq),
-
- TP_ARGS(q, rq)
-);
-
-/**
* block_rq_complete - block IO operation completed by device driver
* @q: queue containing the block operation request
* @rq: block operations request
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index b2058a7f94bd..9f3624dadb09 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -716,12 +716,6 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
rq->cmd_flags, what, rq->errors, 0, NULL);
}
-static void blk_add_trace_rq_abort(void *ignore,
- struct request_queue *q, struct request *rq)
-{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_ABORT);
-}
-
static void blk_add_trace_rq_insert(void *ignore,
struct request_queue *q, struct request *rq)
{
@@ -974,8 +968,6 @@ static void blk_register_tracepoints(void)
{
int ret;
- ret = register_trace_block_rq_abort(blk_add_trace_rq_abort, NULL);
- WARN_ON(ret);
ret = register_trace_block_rq_insert(blk_add_trace_rq_insert, NULL);
WARN_ON(ret);
ret = register_trace_block_rq_issue(blk_add_trace_rq_issue, NULL);
@@ -1028,7 +1020,6 @@ static void blk_unregister_tracepoints(void)
unregister_trace_block_rq_requeue(blk_add_trace_rq_requeue, NULL);
unregister_trace_block_rq_issue(blk_add_trace_rq_issue, NULL);
unregister_trace_block_rq_insert(blk_add_trace_rq_insert, NULL);
- unregister_trace_block_rq_abort(blk_add_trace_rq_abort, NULL);
tracepoint_synchronize_unregister();
}
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* [PATCH 25/25] block: remove the errors field from struct request
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 15:39 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-core.c | 14 +-------------
block/blk-exec.c | 3 +--
block/blk-mq.c | 10 +++-------
block/blk-timeout.c | 1 -
include/linux/blkdev.h | 2 --
include/trace/events/block.h | 17 +++++++----------
kernel/trace/blktrace.c | 24 +++++++++++-------------
7 files changed, 23 insertions(+), 48 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 316a5399fb15..4f95bdaa1e16 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1633,7 +1633,6 @@ void init_request_from_bio(struct request *req, struct bio *bio)
if (bio->bi_opf & REQ_RAHEAD)
req->cmd_flags |= REQ_FAILFAST_MASK;
- req->errors = 0;
req->__sector = bio->bi_iter.bi_sector;
blk_rq_set_prio(req, rq_ioc(bio));
if (ioprio_valid(bio_prio(bio)))
@@ -2561,22 +2560,11 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
{
int total_bytes;
- trace_block_rq_complete(req->q, req, nr_bytes);
+ trace_block_rq_complete(req, error, nr_bytes);
if (!req->bio)
return false;
- /*
- * For fs requests, rq is just carrier of independent bio's
- * and each partial completion should be handled separately.
- * Reset per-request error on each partial completion.
- *
- * TODO: tj: This is too subtle. It would be better to let
- * low level drivers do what they see fit.
- */
- if (!blk_rq_is_passthrough(req))
- req->errors = 0;
-
if (error && !blk_rq_is_passthrough(req) &&
!(req->rq_flags & RQF_QUIET)) {
char *error_type;
diff --git a/block/blk-exec.c b/block/blk-exec.c
index afa383248c7c..a9451e3b8587 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -69,8 +69,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
if (unlikely(blk_queue_dying(q))) {
rq->rq_flags |= RQF_QUIET;
- rq->errors = -ENXIO;
- __blk_end_request_all(rq, rq->errors);
+ __blk_end_request_all(rq, -ENXIO);
spin_unlock_irq(q->queue_lock);
return;
}
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a6e14a3c87ce..072f139704d5 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -213,7 +213,6 @@ void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
#endif
rq->special = NULL;
/* tag was already set */
- rq->errors = 0;
rq->extra_len = 0;
INIT_LIST_HEAD(&rq->timeout_list);
@@ -621,8 +620,7 @@ void blk_mq_abort_requeue_list(struct request_queue *q)
rq = list_first_entry(&rq_list, struct request, queuelist);
list_del_init(&rq->queuelist);
- rq->errors = -EIO;
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, -EIO);
}
}
EXPORT_SYMBOL(blk_mq_abort_requeue_list);
@@ -1029,8 +1027,7 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list)
pr_err("blk-mq: bad return on queue: %d\n", ret);
case BLK_MQ_RQ_QUEUE_ERROR:
errors++;
- rq->errors = -EIO;
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, -EIO);
break;
}
@@ -1445,8 +1442,7 @@ static void __blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie,
if (ret == BLK_MQ_RQ_QUEUE_ERROR) {
*cookie = BLK_QC_T_NONE;
- rq->errors = -EIO;
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, -EIO);
return;
}
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index a30441a200c0..cbff183f3d9f 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -89,7 +89,6 @@ static void blk_rq_timed_out(struct request *req)
ret = q->rq_timed_out_fn(req);
switch (ret) {
case BLK_EH_HANDLED:
- /* Can we use req->errors here? */
__blk_complete_request(req);
break;
case BLK_EH_RESET_TIMER:
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index fa75401ea5cc..f912ddc39020 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -220,8 +220,6 @@ struct request {
void *special; /* opaque pointer available for LLD use */
- int errors;
-
unsigned int extra_len; /* length of alignment and padding */
unsigned long deadline;
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index 99ed69fad041..d0dbe60d8a6d 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -80,7 +80,6 @@ TRACE_EVENT(block_rq_requeue,
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
- __field( int, errors )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@@ -89,7 +88,6 @@ TRACE_EVENT(block_rq_requeue,
__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
__entry->sector = blk_rq_trace_sector(rq);
__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
- __entry->errors = rq->errors;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
__get_str(cmd)[0] = '\0';
@@ -99,13 +97,13 @@ TRACE_EVENT(block_rq_requeue,
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
- __entry->nr_sector, __entry->errors)
+ __entry->nr_sector, 0)
);
/**
* block_rq_complete - block IO operation completed by device driver
- * @q: queue containing the block operation request
* @rq: block operations request
+ * @error: status code
* @nr_bytes: number of completed bytes
*
* The block_rq_complete tracepoint event indicates that some portion
@@ -116,16 +114,15 @@ TRACE_EVENT(block_rq_requeue,
*/
TRACE_EVENT(block_rq_complete,
- TP_PROTO(struct request_queue *q, struct request *rq,
- unsigned int nr_bytes),
+ TP_PROTO(struct request *rq, int error, unsigned int nr_bytes),
- TP_ARGS(q, rq, nr_bytes),
+ TP_ARGS(rq, error, nr_bytes),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
- __field( int, errors )
+ __field( int, error )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@@ -134,7 +131,7 @@ TRACE_EVENT(block_rq_complete,
__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
__entry->sector = blk_rq_pos(rq);
__entry->nr_sector = nr_bytes >> 9;
- __entry->errors = rq->errors;
+ __entry->error = error;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, nr_bytes);
__get_str(cmd)[0] = '\0';
@@ -144,7 +141,7 @@ TRACE_EVENT(block_rq_complete,
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
- __entry->nr_sector, __entry->errors)
+ __entry->nr_sector, __entry->error)
);
DECLARE_EVENT_CLASS(block_rq,
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 9f3624dadb09..0fd99db8c381 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -699,10 +699,10 @@ void blk_trace_shutdown(struct request_queue *q)
* Records an action against a request. Will log the bio offset + size.
*
**/
-static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
+static void blk_add_trace_rq(struct request *rq, int error,
unsigned int nr_bytes, u32 what)
{
- struct blk_trace *bt = q->blk_trace;
+ struct blk_trace *bt = rq->q->blk_trace;
if (likely(!bt))
return;
@@ -713,34 +713,32 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
what |= BLK_TC_ACT(BLK_TC_FS);
__blk_add_trace(bt, blk_rq_trace_sector(rq), nr_bytes, req_op(rq),
- rq->cmd_flags, what, rq->errors, 0, NULL);
+ rq->cmd_flags, what, error, 0, NULL);
}
static void blk_add_trace_rq_insert(void *ignore,
struct request_queue *q, struct request *rq)
{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_INSERT);
+ blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_INSERT);
}
static void blk_add_trace_rq_issue(void *ignore,
struct request_queue *q, struct request *rq)
{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_ISSUE);
+ blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_ISSUE);
}
static void blk_add_trace_rq_requeue(void *ignore,
struct request_queue *q,
struct request *rq)
{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_REQUEUE);
+ blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_REQUEUE);
}
-static void blk_add_trace_rq_complete(void *ignore,
- struct request_queue *q,
- struct request *rq,
- unsigned int nr_bytes)
+static void blk_add_trace_rq_complete(void *ignore, struct request *rq,
+ int error, unsigned int nr_bytes)
{
- blk_add_trace_rq(q, rq, nr_bytes, BLK_TA_COMPLETE);
+ blk_add_trace_rq(rq, error, nr_bytes, BLK_TA_COMPLETE);
}
/**
@@ -935,7 +933,7 @@ static void blk_add_trace_rq_remap(void *ignore,
r.sector_from = cpu_to_be64(from);
__blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq),
- rq_data_dir(rq), 0, BLK_TA_REMAP, !!rq->errors,
+ rq_data_dir(rq), 0, BLK_TA_REMAP, 0,
sizeof(r), &r);
}
@@ -960,7 +958,7 @@ void blk_add_driver_data(struct request_queue *q,
return;
__blk_add_trace(bt, blk_rq_trace_sector(rq), blk_rq_bytes(rq), 0, 0,
- BLK_TA_DRV_DATA, rq->errors, len, data);
+ BLK_TA_DRV_DATA, 0, len, data);
}
EXPORT_SYMBOL_GPL(blk_add_driver_data);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread* [PATCH 25/25] block: remove the errors field from struct request
@ 2017-04-06 15:39 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-06 15:39 UTC (permalink / raw)
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
block/blk-core.c | 14 +-------------
block/blk-exec.c | 3 +--
block/blk-mq.c | 10 +++-------
block/blk-timeout.c | 1 -
include/linux/blkdev.h | 2 --
include/trace/events/block.h | 17 +++++++----------
kernel/trace/blktrace.c | 24 +++++++++++-------------
7 files changed, 23 insertions(+), 48 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 316a5399fb15..4f95bdaa1e16 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1633,7 +1633,6 @@ void init_request_from_bio(struct request *req, struct bio *bio)
if (bio->bi_opf & REQ_RAHEAD)
req->cmd_flags |= REQ_FAILFAST_MASK;
- req->errors = 0;
req->__sector = bio->bi_iter.bi_sector;
blk_rq_set_prio(req, rq_ioc(bio));
if (ioprio_valid(bio_prio(bio)))
@@ -2561,22 +2560,11 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
{
int total_bytes;
- trace_block_rq_complete(req->q, req, nr_bytes);
+ trace_block_rq_complete(req, error, nr_bytes);
if (!req->bio)
return false;
- /*
- * For fs requests, rq is just carrier of independent bio's
- * and each partial completion should be handled separately.
- * Reset per-request error on each partial completion.
- *
- * TODO: tj: This is too subtle. It would be better to let
- * low level drivers do what they see fit.
- */
- if (!blk_rq_is_passthrough(req))
- req->errors = 0;
-
if (error && !blk_rq_is_passthrough(req) &&
!(req->rq_flags & RQF_QUIET)) {
char *error_type;
diff --git a/block/blk-exec.c b/block/blk-exec.c
index afa383248c7c..a9451e3b8587 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -69,8 +69,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
if (unlikely(blk_queue_dying(q))) {
rq->rq_flags |= RQF_QUIET;
- rq->errors = -ENXIO;
- __blk_end_request_all(rq, rq->errors);
+ __blk_end_request_all(rq, -ENXIO);
spin_unlock_irq(q->queue_lock);
return;
}
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a6e14a3c87ce..072f139704d5 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -213,7 +213,6 @@ void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
#endif
rq->special = NULL;
/* tag was already set */
- rq->errors = 0;
rq->extra_len = 0;
INIT_LIST_HEAD(&rq->timeout_list);
@@ -621,8 +620,7 @@ void blk_mq_abort_requeue_list(struct request_queue *q)
rq = list_first_entry(&rq_list, struct request, queuelist);
list_del_init(&rq->queuelist);
- rq->errors = -EIO;
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, -EIO);
}
}
EXPORT_SYMBOL(blk_mq_abort_requeue_list);
@@ -1029,8 +1027,7 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list)
pr_err("blk-mq: bad return on queue: %d\n", ret);
case BLK_MQ_RQ_QUEUE_ERROR:
errors++;
- rq->errors = -EIO;
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, -EIO);
break;
}
@@ -1445,8 +1442,7 @@ static void __blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie,
if (ret == BLK_MQ_RQ_QUEUE_ERROR) {
*cookie = BLK_QC_T_NONE;
- rq->errors = -EIO;
- blk_mq_end_request(rq, rq->errors);
+ blk_mq_end_request(rq, -EIO);
return;
}
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index a30441a200c0..cbff183f3d9f 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -89,7 +89,6 @@ static void blk_rq_timed_out(struct request *req)
ret = q->rq_timed_out_fn(req);
switch (ret) {
case BLK_EH_HANDLED:
- /* Can we use req->errors here? */
__blk_complete_request(req);
break;
case BLK_EH_RESET_TIMER:
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index fa75401ea5cc..f912ddc39020 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -220,8 +220,6 @@ struct request {
void *special; /* opaque pointer available for LLD use */
- int errors;
-
unsigned int extra_len; /* length of alignment and padding */
unsigned long deadline;
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index 99ed69fad041..d0dbe60d8a6d 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -80,7 +80,6 @@ TRACE_EVENT(block_rq_requeue,
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
- __field( int, errors )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@@ -89,7 +88,6 @@ TRACE_EVENT(block_rq_requeue,
__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
__entry->sector = blk_rq_trace_sector(rq);
__entry->nr_sector = blk_rq_trace_nr_sectors(rq);
- __entry->errors = rq->errors;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, blk_rq_bytes(rq));
__get_str(cmd)[0] = '\0';
@@ -99,13 +97,13 @@ TRACE_EVENT(block_rq_requeue,
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
- __entry->nr_sector, __entry->errors)
+ __entry->nr_sector, 0)
);
/**
* block_rq_complete - block IO operation completed by device driver
- * @q: queue containing the block operation request
* @rq: block operations request
+ * @error: status code
* @nr_bytes: number of completed bytes
*
* The block_rq_complete tracepoint event indicates that some portion
@@ -116,16 +114,15 @@ TRACE_EVENT(block_rq_requeue,
*/
TRACE_EVENT(block_rq_complete,
- TP_PROTO(struct request_queue *q, struct request *rq,
- unsigned int nr_bytes),
+ TP_PROTO(struct request *rq, int error, unsigned int nr_bytes),
- TP_ARGS(q, rq, nr_bytes),
+ TP_ARGS(rq, error, nr_bytes),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( sector_t, sector )
__field( unsigned int, nr_sector )
- __field( int, errors )
+ __field( int, error )
__array( char, rwbs, RWBS_LEN )
__dynamic_array( char, cmd, 1 )
),
@@ -134,7 +131,7 @@ TRACE_EVENT(block_rq_complete,
__entry->dev = rq->rq_disk ? disk_devt(rq->rq_disk) : 0;
__entry->sector = blk_rq_pos(rq);
__entry->nr_sector = nr_bytes >> 9;
- __entry->errors = rq->errors;
+ __entry->error = error;
blk_fill_rwbs(__entry->rwbs, rq->cmd_flags, nr_bytes);
__get_str(cmd)[0] = '\0';
@@ -144,7 +141,7 @@ TRACE_EVENT(block_rq_complete,
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->rwbs, __get_str(cmd),
(unsigned long long)__entry->sector,
- __entry->nr_sector, __entry->errors)
+ __entry->nr_sector, __entry->error)
);
DECLARE_EVENT_CLASS(block_rq,
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 9f3624dadb09..0fd99db8c381 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -699,10 +699,10 @@ void blk_trace_shutdown(struct request_queue *q)
* Records an action against a request. Will log the bio offset + size.
*
**/
-static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
+static void blk_add_trace_rq(struct request *rq, int error,
unsigned int nr_bytes, u32 what)
{
- struct blk_trace *bt = q->blk_trace;
+ struct blk_trace *bt = rq->q->blk_trace;
if (likely(!bt))
return;
@@ -713,34 +713,32 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
what |= BLK_TC_ACT(BLK_TC_FS);
__blk_add_trace(bt, blk_rq_trace_sector(rq), nr_bytes, req_op(rq),
- rq->cmd_flags, what, rq->errors, 0, NULL);
+ rq->cmd_flags, what, error, 0, NULL);
}
static void blk_add_trace_rq_insert(void *ignore,
struct request_queue *q, struct request *rq)
{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_INSERT);
+ blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_INSERT);
}
static void blk_add_trace_rq_issue(void *ignore,
struct request_queue *q, struct request *rq)
{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_ISSUE);
+ blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_ISSUE);
}
static void blk_add_trace_rq_requeue(void *ignore,
struct request_queue *q,
struct request *rq)
{
- blk_add_trace_rq(q, rq, blk_rq_bytes(rq), BLK_TA_REQUEUE);
+ blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_REQUEUE);
}
-static void blk_add_trace_rq_complete(void *ignore,
- struct request_queue *q,
- struct request *rq,
- unsigned int nr_bytes)
+static void blk_add_trace_rq_complete(void *ignore, struct request *rq,
+ int error, unsigned int nr_bytes)
{
- blk_add_trace_rq(q, rq, nr_bytes, BLK_TA_COMPLETE);
+ blk_add_trace_rq(rq, error, nr_bytes, BLK_TA_COMPLETE);
}
/**
@@ -935,7 +933,7 @@ static void blk_add_trace_rq_remap(void *ignore,
r.sector_from = cpu_to_be64(from);
__blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq),
- rq_data_dir(rq), 0, BLK_TA_REMAP, !!rq->errors,
+ rq_data_dir(rq), 0, BLK_TA_REMAP, 0,
sizeof(r), &r);
}
@@ -960,7 +958,7 @@ void blk_add_driver_data(struct request_queue *q,
return;
__blk_add_trace(bt, blk_rq_trace_sector(rq), blk_rq_bytes(rq), 0, 0,
- BLK_TA_DRV_DATA, rq->errors, len, data);
+ BLK_TA_DRV_DATA, 0, len, data);
}
EXPORT_SYMBOL_GPL(blk_add_driver_data);
--
2.11.0
^ permalink raw reply related [flat|nested] 115+ messages in thread
* Re: kill req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-06 20:00 ` Konrad Rzeszutek Wilk
-1 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-06 20:00 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 05:39:19PM +0200, Christoph Hellwig wrote:
> Currently the request structure has an errors field that is used in
> various different ways. The oldest drivers use it as an error count,
> blk-mq and the generic timeout code assume that it holds a Linux
> errno for block completions, and various drivers use it for internal
> status values, often overwriting them with Linux errnos later,
> that is unless they are processing passthrough requests in which
> case they'll leave their errors in it.
>
> This series kills the ->errors field and replaced it with new fields
> in the drivers (or an odd hack in a union in struct request for
> two bitrotting old drivers).
>
> Note that this series expects that the patch to remove the mg_disk
> driver has been applied already on top of the block for-next tree.
You wouldn't have a git tree to easily test it? Thanks.
^ permalink raw reply [flat|nested] 115+ messages in thread
* kill req->errors
@ 2017-04-06 20:00 ` Konrad Rzeszutek Wilk
0 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-06 20:00 UTC (permalink / raw)
On Thu, Apr 06, 2017@05:39:19PM +0200, Christoph Hellwig wrote:
> Currently the request structure has an errors field that is used in
> various different ways. The oldest drivers use it as an error count,
> blk-mq and the generic timeout code assume that it holds a Linux
> errno for block completions, and various drivers use it for internal
> status values, often overwriting them with Linux errnos later,
> that is unless they are processing passthrough requests in which
> case they'll leave their errors in it.
>
> This series kills the ->errors field and replaced it with new fields
> in the drivers (or an odd hack in a union in struct request for
> two bitrotting old drivers).
>
> Note that this series expects that the patch to remove the mg_disk
> driver has been applied already on top of the block for-next tree.
You wouldn't have a git tree to easily test it? Thanks.
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: kill req->errors
2017-04-06 20:00 ` Konrad Rzeszutek Wilk
@ 2017-04-07 7:11 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-07 7:11 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk
Cc: Christoph Hellwig, Jens Axboe, Josef Bacik, James Smart,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 04:00:24PM -0400, Konrad Rzeszutek Wilk wrote:
> You wouldn't have a git tree to easily test it? Thanks.
git://git.infradead.org/users/hch/block.git request-errors
Gitweb:
http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/request-errors
^ permalink raw reply [flat|nested] 115+ messages in thread
* kill req->errors
@ 2017-04-07 7:11 ` Christoph Hellwig
0 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-07 7:11 UTC (permalink / raw)
On Thu, Apr 06, 2017@04:00:24PM -0400, Konrad Rzeszutek Wilk wrote:
> You wouldn't have a git tree to easily test it? Thanks.
git://git.infradead.org/users/hch/block.git request-errors
Gitweb:
http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/request-errors
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: kill req->errors
2017-04-07 7:11 ` Christoph Hellwig
@ 2017-04-18 14:33 ` Konrad Rzeszutek Wilk
-1 siblings, 0 replies; 115+ messages in thread
From: Konrad Rzeszutek Wilk @ 2017-04-18 14:33 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Josef Bacik, James Smart, Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Fri, Apr 07, 2017 at 09:11:24AM +0200, Christoph Hellwig wrote:
> On Thu, Apr 06, 2017 at 04:00:24PM -0400, Konrad Rzeszutek Wilk wrote:
> > You wouldn't have a git tree to easily test it? Thanks.
>
> git://git.infradead.org/users/hch/block.git request-errors
>
> Gitweb:
>
> http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/request-errors
I tested it with Xen and it all worked out. Albeit in hindsight I didn't check
the ones that matter - that is the error paths (duh!).
So let me do that now.
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: kill req->errors
2017-04-06 20:00 ` Konrad Rzeszutek Wilk
@ 2017-04-12 8:37 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-12 8:37 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk
Cc: Christoph Hellwig, Jens Axboe, Josef Bacik, James Smart,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
On Thu, Apr 06, 2017 at 04:00:24PM -0400, Konrad Rzeszutek Wilk wrote:
> You wouldn't have a git tree to easily test it? Thanks.
Did you manage to give it a spin now that I pointed you to the git
tree?
^ permalink raw reply [flat|nested] 115+ messages in thread
* Re: kill req->errors
2017-04-06 15:39 ` Christoph Hellwig
@ 2017-04-12 8:38 ` Christoph Hellwig
-1 siblings, 0 replies; 115+ messages in thread
From: Christoph Hellwig @ 2017-04-12 8:38 UTC (permalink / raw)
To: Jens Axboe
Cc: Josef Bacik, James Smart, Konrad Rzeszutek Wilk,
Roger Pau Monné,
linux-scsi, linux-nvme, linux-block, dm-devel
Any more comments on these patches? I'd like to make some progress
on this work.
^ permalink raw reply [flat|nested] 115+ messages in thread