From: Martin K. Petersen <martin.petersen@oracle.com>
Date: Tue, 18 Sep 2012 16:19:31 +0000 (-0400)
Subject: [SCSI] sd: Permit merged discard requests
X-Git-Tag: v3.7-rc7~19^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26e85fcd15f68b57d9ba645cd3591117a8ac0e05;p=pandora-kernel.git

[SCSI] sd: Permit merged discard requests

Support requests with more than one bio payload for discards. The total
number of bytes to be discarded is stored in req->__data_len and used in
sd_done() to complete the I/O.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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