[PATCH] return full SCSI status byte in SG_IO

This has been around for a while. Return the full scsi result byte in
rq->errors for SG_IO generated requests.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/block/scsi_ioctl.c

@@ -293,11 +293,11 @@ static int sg_io(struct file *file, request_queue_t *q,
 	blk_execute_rq(q, bd_disk, rq);
 
 	/* write to all output members */
-	hdr->status = rq->errors;	
-	hdr->masked_status = (hdr->status >> 1) & 0x1f;
-	hdr->msg_status = 0;
-	hdr->host_status = 0;
-	hdr->driver_status = 0;
+	hdr->status = 0xff & rq->errors;
+	hdr->masked_status = status_byte(rq->errors);
+	hdr->msg_status = msg_byte(rq->errors);
+	hdr->host_status = host_byte(rq->errors);
+	hdr->driver_status = driver_byte(rq->errors);
 	hdr->info = 0;
 	if (hdr->masked_status || hdr->host_status || hdr->driver_status)
 		hdr->info |= SG_INFO_CHECK;

drivers/scsi/scsi_lib.c

@@ -712,8 +712,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes,
 	}
 
 	if (blk_pc_request(req)) { /* SG_IO ioctl from block level */
-		req->errors = (driver_byte(result) & DRIVER_SENSE) ?
-			      (CHECK_CONDITION << 1) : (result & 0xff);
+		req->errors = result;
 		if (result) {
 			clear_errors = 0;
 			if (scsi_command_normalize_sense(cmd, &sshdr)) {