[PATCH] Fix NULL pointer dereference in blkmtd.c

From: Michel Marti <michel.marti@objectxp.com>

The blkmtd driver oopses in add_device().  The following trivial patch
fixes this.

drivers/mtd/devices/blkmtd.c

@@ -664,12 +664,12 @@ static struct blkmtd_dev *add_device(char *devname, int readonly, int erase_size
 	}
 
 	memset(dev, 0, sizeof(struct blkmtd_dev));
+	dev->blkdev = bdev;
 	atomic_set(&(dev->blkdev->bd_inode->i_mapping->truncate_count), 0);
 	if(!readonly) {
 		init_MUTEX(&dev->wrbuf_mutex);
 	}
 
-	dev->blkdev = bdev;
 	dev->mtd_info.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
 
 	/* Setup the MTD structure */