From: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Date: Tue, 1 May 2012 16:42:30 +0000 (-0500)
Subject: [SCSI] hpsa: do not read from controller unnecessarily in completion code
X-Git-Tag: v3.5-rc1~172^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c17d2da8c9ef2c5be5077d3995041791e38094d;p=pandora-kernel.git

[SCSI] hpsa: do not read from controller unnecessarily in completion code

MSI/MSI-X interrupts can't race the DMA completion they are communicating
so no need to read from controller to flush the DMA to the host if
MSI or MSI-X interrupts are being used.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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