From 73a5bf472921068e6db10e7e325b7ac46f111834 Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Mon, 29 Jul 2019 18:36:05 -0400
Subject: [PATCH] Revert "ide/ahci: Check for -ECANCELED in aio callbacks"

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>
(cherry picked from commit 8ec41c4265714255d5a138f8b538faf3583dcff6)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.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 00ba422a48..6aaf66534a 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1023,9 +1023,6 @@ 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 6afadf894f..8e1624f7ce 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -722,9 +722,6 @@ 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)) {
@@ -840,10 +837,6 @@ 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;
@@ -975,10 +968,6 @@ 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;

@@ -1058,9 +1047,6 @@ 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)) {
--
2.23.0