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[SCSI] hpsa: add support for 'fastpath' i/o
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For certain i/o's to certain devices (unmasked physical disks) we
can bypass the RAID stack firmware and do the i/o to the device
directly and it will be faster.

Signed-off-by: Matt Gates <matthew.gates@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Matt Gates authored and James Bottomley committed Mar 15, 2014
1 parent e1d9cbf commit e1f7de0
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