[F][PATCH 2/2] virtio-blk: improve virtqueue error to BLK_STS
frank.heimes at canonical.com
frank.heimes at canonical.com
Fri Mar 13 12:31:44 UTC 2020
From: Halil Pasic <pasic at linux.ibm.com>
BugLink: https://bugs.launchpad.net/bugs/1867109
Let's change the mapping between virtqueue_add errors to BLK_STS
statuses, so that -ENOSPC, which indicates virtqueue full is still
mapped to BLK_STS_DEV_RESOURCE, but -ENOMEM which indicates non-device
specific resource outage is mapped to BLK_STS_RESOURCE.
Signed-off-by: Halil Pasic <pasic at linux.ibm.com>
Link: https://lore.kernel.org/r/20200213123728.61216-3-pasic@linux.ibm.com
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha at redhat.com>
(cherry picked from commit 3d973b2e9a625996ee997c7303cd793b9d197c65)
Signed-off-by: Frank Heimes <frank.heimes at canonical.com>
---
drivers/block/virtio_blk.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index c2ed3e9128e3..a55383b139df 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -345,9 +345,14 @@ static blk_status_t virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
if (err == -ENOSPC)
blk_mq_stop_hw_queue(hctx);
spin_unlock_irqrestore(&vblk->vqs[qid].lock, flags);
- if (err == -ENOMEM || err == -ENOSPC)
+ switch (err) {
+ case -ENOSPC:
return BLK_STS_DEV_RESOURCE;
- return BLK_STS_IOERR;
+ case -ENOMEM:
+ return BLK_STS_RESOURCE;
+ default:
+ return BLK_STS_IOERR;
+ }
}
if (bd->last && virtqueue_kick_prepare(vblk->vqs[qid].vq))
--
2.25.0
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