[PATCH] megaraid2 bad queuecommand return

If the command is already completed, megaraid_queue_command() must
return 0.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/megaraid/megaraid_mbox.c

@@ -1623,6 +1623,7 @@ megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
 
 	if (!scb) {	// command already completed
 		done(scp);
+		return 0;
 	}
 
 	return if_busy;