From: Nicholas Bellinger <nab@daterainc.com>
Date: Sun, 25 Aug 2013 23:10:57 +0000 (-0700)
Subject: target: Do memory allocation for bidi commands using target_alloc_sgl
X-Git-Tag: v3.12-rc1~23^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cefe07b5e9c2b0212ad6809a219e4489807a746;p=pandora-kernel.git

target: Do memory allocation for bidi commands using target_alloc_sgl

This patch updates transport_generic_new_cmd() to call target_alloc_sgl()
for SGL + page memory allocation for se_cmd->t_bidi_data_sg.

It also adds the special case for SCF_COMPARE_AND_WRITE to calculate a
different bidi_length based upon se_cmd->t_task_nolb.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
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