[PATCH] cciss: fix for deregister_disk

This patch adds setting our drv->queue = NULL back in deregister_disk.  The
drv->queue is part of our controller struct.  blk_cleanup_queue works only
on the queue in the gendisk struct.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/block/cciss.c

@@ -1464,8 +1464,10 @@ static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
 			request_queue_t *q = disk->queue;
 			if (disk->flags & GENHD_FL_UP)
 				del_gendisk(disk);
-			if (q)	
+			if (q) {
 				blk_cleanup_queue(q);
+				drv->queue = NULL;
+			}
 		}
 	}