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[SCSI] hpsa: do not read from controller unnecessarily in completion code
authorStephen M. Cameron <scameron@beardog.cce.hp.com>
Tue, 1 May 2012 16:42:30 +0000 (11:42 -0500)
committerJames Bottomley <JBottomley@Parallels.com>
Thu, 10 May 2012 08:11:43 +0000 (09:11 +0100)
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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