Commit 97d53c4d authored by Ching Huang's avatar Ching Huang Committed by Sasha Levin

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: default avatarChing Huang <ching2048@areca.com.tw>
Reported-by: default avatarTomas Henzl <thenzl@redhat.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent d207c660
......@@ -2540,18 +2540,9 @@ static int arcmsr_queue_command_lck(struct scsi_cmnd *cmd,
struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
struct CommandControlBlock *ccb;
int target = cmd->device->id;
int lun = cmd->device->lun;
uint8_t scsicmd = cmd->cmnd[0];
cmd->scsi_done = done;
cmd->host_scribble = NULL;
cmd->result = 0;
if ((scsicmd == SYNCHRONIZE_CACHE) ||(scsicmd == SEND_DIAGNOSTIC)){
if(acb->devstate[target][lun] == ARECA_RAID_GONE) {
cmd->result = (DID_NO_CONNECT << 16);
}
cmd->scsi_done(cmd);
return 0;
}
if (target == 16) {
/* virtual device for iop message transfer */
arcmsr_handle_virtual_command(acb, cmd);
......
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