From: Long Li <longli@microsoft.com>
Date: Sat, 6 Dec 2014 03:38:18 +0000 (-0800)
Subject: storvsc: ring buffer failures may result in I/O freeze
X-Git-Tag: omap-for-v3.19/fixes-rc1~11^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e86fb5e8ab95f10ec5f2e9430119d5d35020c951;p=pandora-kernel.git

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
---

Reading git-diff-tree failed