From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 60/72] ACPI: scan: Use unique number for instance_no
Date: Mon, 29 Mar 2021 09:58:36 +0200 [thread overview]
Message-ID: <20210329075612.269984763@linuxfoundation.org> (raw)
In-Reply-To: <20210329075610.300795746@linuxfoundation.org>
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[ Upstream commit eb50aaf960e3bedfef79063411ffd670da94b84b ]
The decrementation of acpi_device_bus_id->instance_no
in acpi_device_del() is incorrect, because it may cause
a duplicate instance number to be allocated next time
a device with the same acpi_device_bus_id is added.
Replace above mentioned approach by using IDA framework.
While at it, define the instance range to be [0, 4096).
Fixes: e49bd2dd5a50 ("ACPI: use PNPID:instance_no as bus_id of ACPI device")
Fixes: ca9dc8d42b30 ("ACPI / scan: Fix acpi_bus_id_list bookkeeping")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: 4.10+ <stable@vger.kernel.org> # 4.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/acpi/internal.h | 6 +++++-
drivers/acpi/scan.c | 33 ++++++++++++++++++++++++++++-----
include/acpi/acpi_bus.h | 1 +
3 files changed, 34 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 6def196cc23c..913613cf5c53 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -18,6 +18,8 @@
#ifndef _ACPI_INTERNAL_H_
#define _ACPI_INTERNAL_H_
+#include <linux/idr.h>
+
#define PREFIX "ACPI: "
int early_acpi_osi_init(void);
@@ -97,9 +99,11 @@ void acpi_scan_table_handler(u32 event, void *table, void *context);
extern struct list_head acpi_bus_id_list;
+#define ACPI_MAX_DEVICE_INSTANCES 4096
+
struct acpi_device_bus_id {
const char *bus_id;
- unsigned int instance_no;
+ struct ida instance_ida;
struct list_head node;
};
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 712599019892..d3c551bdc2da 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -482,9 +482,8 @@ static void acpi_device_del(struct acpi_device *device)
list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node)
if (!strcmp(acpi_device_bus_id->bus_id,
acpi_device_hid(device))) {
- if (acpi_device_bus_id->instance_no > 0)
- acpi_device_bus_id->instance_no--;
- else {
+ ida_simple_remove(&acpi_device_bus_id->instance_ida, device->pnp.instance_no);
+ if (ida_is_empty(&acpi_device_bus_id->instance_ida)) {
list_del(&acpi_device_bus_id->node);
kfree_const(acpi_device_bus_id->bus_id);
kfree(acpi_device_bus_id);
@@ -635,6 +634,21 @@ static struct acpi_device_bus_id *acpi_device_bus_id_match(const char *dev_id)
return NULL;
}
+static int acpi_device_set_name(struct acpi_device *device,
+ struct acpi_device_bus_id *acpi_device_bus_id)
+{
+ struct ida *instance_ida = &acpi_device_bus_id->instance_ida;
+ int result;
+
+ result = ida_simple_get(instance_ida, 0, ACPI_MAX_DEVICE_INSTANCES, GFP_KERNEL);
+ if (result < 0)
+ return result;
+
+ device->pnp.instance_no = result;
+ dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, result);
+ return 0;
+}
+
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *))
{
@@ -669,7 +683,9 @@ int acpi_device_add(struct acpi_device *device,
acpi_device_bus_id = acpi_device_bus_id_match(acpi_device_hid(device));
if (acpi_device_bus_id) {
- acpi_device_bus_id->instance_no++;
+ result = acpi_device_set_name(device, acpi_device_bus_id);
+ if (result)
+ goto err_unlock;
} else {
acpi_device_bus_id = kzalloc(sizeof(*acpi_device_bus_id),
GFP_KERNEL);
@@ -685,9 +701,16 @@ int acpi_device_add(struct acpi_device *device,
goto err_unlock;
}
+ ida_init(&acpi_device_bus_id->instance_ida);
+
+ result = acpi_device_set_name(device, acpi_device_bus_id);
+ if (result) {
+ kfree(acpi_device_bus_id);
+ goto err_unlock;
+ }
+
list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list);
}
- dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
if (device->parent)
list_add_tail(&device->node, &device->parent->children);
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index d9773df60a36..8b19618bad0a 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -248,6 +248,7 @@ struct acpi_pnp_type {
struct acpi_device_pnp {
acpi_bus_id bus_id; /* Object name */
+ int instance_no; /* Instance number of this object */
struct acpi_pnp_type type; /* ID type */
acpi_bus_address bus_address; /* _ADR */
char *unique_id; /* _UID */
--
2.30.1
next prev parent reply other threads:[~2021-03-29 8:16 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 7:57 [PATCH 4.19 00/72] 4.19.184-rc1 review Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 01/72] net: fec: ptp: avoid register access when ipg clock is disabled Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 02/72] powerpc/4xx: Fix build errors from mfdcr() Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 03/72] atm: eni: dont release is never initialized Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 04/72] atm: lanai: dont run lanai_dev_close if not open Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 05/72] Revert "r8152: adjust the settings about MAC clock speed down for RTL8153" Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 06/72] ixgbe: Fix memleak in ixgbe_configure_clsu32 Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 07/72] net: tehuti: fix error return code in bdx_probe() Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 08/72] sun/niu: fix wrong RXMAC_BC_FRM_CNT_COUNT count Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 09/72] gianfar: fix jumbo packets+napi+rx overrun crash Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 10/72] gpiolib: acpi: Add missing IRQF_ONESHOT Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 11/72] nfs: fix PNFS_FLEXFILE_LAYOUT Kconfig default Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 12/72] NFS: Correct size calculation for create reply length Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 13/72] net: hisilicon: hns: fix error return code of hns_nic_clear_all_rx_fetch() Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 14/72] net: wan: fix error return code of uhdlc_init() Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 15/72] atm: uPD98402: fix incorrect allocation Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 16/72] atm: idt77252: fix null-ptr-dereference Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 17/72] sparc64: Fix opcode filtering in handling of no fault loads Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 18/72] u64_stats,lockdep: Fix u64_stats_init() vs lockdep Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 19/72] drm/radeon: fix AGP dependency Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 20/72] nfs: we dont support removing system.nfs4_acl Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 21/72] block: Suppress uevent for hidden device when removed Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 22/72] ia64: fix ia64_syscall_get_set_arguments() for break-based syscalls Greg Kroah-Hartman
2021-03-29 7:57 ` [PATCH 4.19 23/72] ia64: fix ptrace(PTRACE_SYSCALL_INFO_EXIT) sign Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 24/72] netsec: restore phy power state after controller reset Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 25/72] platform/x86: intel-vbtn: Stop reporting SW_DOCK events Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 26/72] squashfs: fix inode lookup sanity checks Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 27/72] squashfs: fix xattr id and id " Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 28/72] arm64: dts: ls1046a: mark crypto engine dma coherent Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 29/72] arm64: dts: ls1012a: " Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 30/72] arm64: dts: ls1043a: " Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 31/72] ARM: dts: at91-sama5d27_som1: fix phy address to 7 Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 32/72] dm ioctl: fix out of bounds array access when no devices Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 33/72] bus: omap_l3_noc: mark l3 irqs as IRQF_NO_THREAD Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 34/72] veth: Store queue_mapping independently of XDP prog presence Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 35/72] libbpf: Fix INSTALL flag order Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 36/72] macvlan: macvlan_count_rx() needs to be aware of preemption Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 37/72] net: dsa: bcm_sf2: Qualify phydev->dev_flags based on port Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 38/72] e1000e: add rtnl_lock() to e1000_reset_task Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 39/72] e1000e: Fix error handling in e1000_set_d0_lplu_state_82571 Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 40/72] net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 41/72] ftgmac100: Restart MAC HW once Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 42/72] netfilter: ctnetlink: fix dump of the expect mask attribute Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 43/72] can: peak_usb: add forgotten supported devices Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 44/72] can: flexcan: flexcan_chip_freeze(): fix chip freeze for missing bitrate Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 45/72] can: c_can_pci: c_can_pci_remove(): fix use-after-free Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 46/72] can: c_can: move runtime PM enable/disable to c_can_platform Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 47/72] can: m_can: m_can_do_rx_poll(): fix extraneous msg loss warning Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 48/72] mac80211: fix rate mask reset Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 49/72] net: cdc-phonet: fix data-interface release on probe failure Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 50/72] net: stmmac: dwmac-sun8i: Provide TX and RX fifo sizes Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 51/72] drm/msm: fix shutdown hook in case GPU components failed to bind Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 52/72] arm64: kdump: update ppos when reading elfcorehdr Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 53/72] net/mlx5e: Fix error path for ethtool set-priv-flag Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 54/72] RDMA/cxgb4: Fix adapter LE hash errors while destroying ipv6 listening server Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 55/72] bpf: Dont do bpf_cgroup_storage_set() for kuprobe/tp programs Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 56/72] Revert "netfilter: x_tables: Switch synchronization to RCU" Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 57/72] netfilter: x_tables: Use correct memory barriers Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 58/72] Revert "netfilter: x_tables: Update remaining dereference to RCU" Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 59/72] ACPI: scan: Rearrange memory allocation in acpi_device_add() Greg Kroah-Hartman
2021-03-29 7:58 ` Greg Kroah-Hartman [this message]
2021-03-29 7:58 ` [PATCH 4.19 61/72] dm verity: add root hash pkcs#7 signature verification Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 62/72] perf auxtrace: Fix auxtrace queue conflict Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 63/72] scsi: qedi: Fix error return code of qedi_alloc_global_queues() Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 64/72] scsi: mpt3sas: Fix error return code of mpt3sas_base_attach() Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 65/72] locking/mutex: Fix non debug version of mutex_lock_io_nested() Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 66/72] x86/mem_encrypt: Correct physical address calculation in __set_clr_pte_enc() Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 67/72] can: dev: Move device back to init netns on owning netns delete Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 68/72] net: sched: validate stab values Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 69/72] net: qrtr: fix a kernel-infoleak in qrtr_recvmsg() Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 70/72] mac80211: fix double free in ibss_leave Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 71/72] ext4: add reclaim checks to xattr code Greg Kroah-Hartman
2021-03-29 7:58 ` [PATCH 4.19 72/72] can: peak_usb: Revert "can: peak_usb: add forgotten supported devices" Greg Kroah-Hartman
2021-03-29 21:33 ` [PATCH 4.19 00/72] 4.19.184-rc1 review Guenter Roeck
2021-03-30 1:27 ` Shuah Khan
2021-03-30 6:52 ` Naresh Kamboju
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