target: use correct sense code for LUN communication failure

The ASC/ASCQ code for 'Logical Unit Communication failure' is
0x08/0x00; 0x80/0x00 is vendor specific.
Signed-off-by: NHannes Reinecke <hare@suse.de>
Cc: Nicholas Bellinger <nab@risingtidesystems.com>
Cc: stable@vger.kernel.org
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_transport.c

@@ -2743,7 +2743,7 @@ transport_send_check_condition_and_sense(struct se_cmd *cmd,
 		/* ILLEGAL REQUEST */
 		buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
 		/* LOGICAL UNIT COMMUNICATION FAILURE */
-		buffer[SPC_ASC_KEY_OFFSET] = 0x80;
+		buffer[SPC_ASC_KEY_OFFSET] = 0x08;
 		break;
 	}
 	/*