[PATCH 1/4] hpsa: check for lv removal

[Don Brace <don.brace@xxxxxxxxxxxxx>]

multipath failures normally detected at the frequency of
the event thread.

 - detect LUN failures earlier by checking request
   completion status

Reviewed-by: Bader Ali-saleh <bader.ali-saleh@xxxxxxxxxxxxx>
Reviewed-by: Scott Benesh <scott.benesh@xxxxxxxxxxxxx>
Reviewed-by: Scott Teel <scott.teel@xxxxxxxxxxxxx>
Reviewed-by: Prasad Munirathnam <Prasad.Munirathnam@xxxxxxxxxxxxx>
Reviewed-by: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx>
Signed-off-by: Don Brace <don.brace@xxxxxxxxxxxxx>
---
 drivers/scsi/hpsa.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index f044e7d10d63..f311ab259a02 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -2647,9 +2647,20 @@ static void complete_scsi_command(struct CommandList *cp)
 			decode_sense_data(ei->SenseInfo, sense_data_size,
 				&sense_key, &asc, &ascq);
 		if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
-			if (sense_key == ABORTED_COMMAND) {
+			switch (sense_key) {
+			case ABORTED_COMMAND:
 				cmd->result |= DID_SOFT_ERROR << 16;
 				break;
+			case UNIT_ATTENTION:
+				if (asc == 0x3F && ascq == 0x0E)
+					h->drv_req_rescan = 1;
+				break;
+			case ILLEGAL_REQUEST:
+				if (asc == 0x25 && ascq == 0x00) {
+					dev->removed = 1;
+					cmd->result = DID_NO_CONNECT << 16;
+				}
+				break;
 			}
 			break;
 		}