tree 248e8524421e7f1319c0e2955fcf6fbf6a796476
parent 60654e250cd32d4315401a468ea779dfe5aed2a9
author Long Li <longli@microsoft.com> 1417837098 -0800
committer Christoph Hellwig <hch@lst.de> 1418646869 +0100

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

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: Long Li <longli@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
cc: stable@vger.kernel.org