Commit 63a60036 authored by Long Li's avatar Long Li Committed by Luis Henriques

storvsc: ring buffer failures may result in I/O freeze

commit e86fb5e8 upstream.

When ring buffer returns an error indicating retry, storvsc may not
return a proper error code to SCSI when bounce buffer is not used.
This has introduced I/O freeze on RAID running atop storvsc devices.
This patch fixes it by always returning a proper error code.
Signed-off-by: default avatarLong Li <longli@microsoft.com>
Reviewed-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent e144f664
......@@ -1690,13 +1690,12 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
if (ret == -EAGAIN) {
/* no more space */
if (cmd_request->bounce_sgl_count) {
if (cmd_request->bounce_sgl_count)
destroy_bounce_buffer(cmd_request->bounce_sgl,
cmd_request->bounce_sgl_count);
ret = SCSI_MLQUEUE_DEVICE_BUSY;
goto queue_error;
}
ret = SCSI_MLQUEUE_DEVICE_BUSY;
goto queue_error;
}
return 0;
......
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