Sasha Levin
2020-Apr-18 14:42 UTC
[PATCH AUTOSEL 4.19 45/47] virtio-blk: improve virtqueue error to BLK_STS
From: Halil Pasic <pasic at linux.ibm.com>
[ Upstream commit 3d973b2e9a625996ee997c7303cd793b9d197c65 ]
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 at linux.ibm.com
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha at redhat.com>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
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 728c9a9609f0c..9a3c2b14ac378 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -277,9 +277,14 @@ 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))
--
2.20.1