scsi: arcmsr: Send SYNCHRONIZE_CACHE command to firmware
[ Upstream commit 2bf7dc84 ] The arcmsr driver failed to pass SYNCHRONIZE CACHE to controller firmware. Depending on how drive caches are handled internally by controller firmware this could potentially lead to data integrity problems. Ensure that cache flushes are passed to the controller. [mkp: applied by hand and removed unused vars] Cc: <stable@vger.kernel.org> Signed-off-by: Ching Huang <ching2048@areca.com.tw> Reported-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
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