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From: John Snow <jsnow@redhat.com>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org,
	Shaju Abraham <shaju.abraham@nutanix.com>,
	jsnow@redhat.com, qemu-stable@nongnu.org
Subject: [Qemu-devel] [PULL 2/3] Revert "ide/ahci: Check for -ECANCELED in aio callbacks"
Date: Fri, 16 Aug 2019 19:16:08 -0400
Message-ID: <20190816231609.9521-3-jsnow@redhat.com> (raw)
In-Reply-To: <20190816231609.9521-1-jsnow@redhat.com>

This reverts commit 0d910cfeaf2076b116b4517166d5deb0fea76394.

It's not correct to just ignore an error code in a callback; we need to
handle that error and possible report failure to the guest so that they
don't wait indefinitely for an operation that will now never finish.

This ought to help cases reported by Nutanix where iSCSI returns a
legitimate -ECANCELED for certain operations which should be propagated
normally.

Reported-by: Shaju Abraham <shaju.abraham@nutanix.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20190729223605.7163-1-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/ide/ahci.c |  3 ---
 hw/ide/core.c | 14 --------------
 2 files changed, 17 deletions(-)

diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index d72da85605a..d45393c019d 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1025,9 +1025,6 @@ static void ncq_cb(void *opaque, int ret)
     IDEState *ide_state = &ncq_tfs->drive->port.ifs[0];
 
     ncq_tfs->aiocb = NULL;
-    if (ret == -ECANCELED) {
-        return;
-    }
 
     if (ret < 0) {
         bool is_read = ncq_tfs->cmd == READ_FPDMA_QUEUED;
diff --git a/hw/ide/core.c b/hw/ide/core.c
index 38b6cdac87b..e6e54c6c9a2 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -723,9 +723,6 @@ static void ide_sector_read_cb(void *opaque, int ret)
     s->pio_aiocb = NULL;
     s->status &= ~BUSY_STAT;
 
-    if (ret == -ECANCELED) {
-        return;
-    }
     if (ret != 0) {
         if (ide_handle_rw_error(s, -ret, IDE_RETRY_PIO |
                                 IDE_RETRY_READ)) {
@@ -841,10 +838,6 @@ static void ide_dma_cb(void *opaque, int ret)
     uint64_t offset;
     bool stay_active = false;
 
-    if (ret == -ECANCELED) {
-        return;
-    }
-
     if (ret == -EINVAL) {
         ide_dma_error(s);
         return;
@@ -976,10 +969,6 @@ static void ide_sector_write_cb(void *opaque, int ret)
     IDEState *s = opaque;
     int n;
 
-    if (ret == -ECANCELED) {
-        return;
-    }
-
     s->pio_aiocb = NULL;
     s->status &= ~BUSY_STAT;
 
@@ -1059,9 +1048,6 @@ static void ide_flush_cb(void *opaque, int ret)
 
     s->pio_aiocb = NULL;
 
-    if (ret == -ECANCELED) {
-        return;
-    }
     if (ret < 0) {
         /* XXX: What sector number to set here? */
         if (ide_handle_rw_error(s, -ret, IDE_RETRY_FLUSH)) {
-- 
2.21.0



  parent reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-16 23:16 [Qemu-devel] [PULL 0/3] Ide patches John Snow
2019-08-16 23:16 ` [Qemu-devel] [PULL 1/3] dma-helpers: ensure AIO callback is invoked after cancellation John Snow
2019-08-16 23:16 ` John Snow [this message]
2019-08-16 23:16 ` [Qemu-devel] [PULL 3/3] hw/ide/atapi: Use the ldst API John Snow
2019-08-19 13:13 ` [Qemu-devel] [PULL 0/3] Ide patches Peter Maydell

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