[PATCH]: Fix crash in virtio_blk during modprobe ; rmmod ; modprobe

[Chris Lalancette <clalance@redhat.com>]

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Fix a modprobe virtio_blk ; rmmod virtio_blk ; modprobe virtio_blk crash; this
was basically because we weren't doing "del_gendisk()" in the remove path.

Signed-off-by: Chris Lalancette <clalance@redhat.com>

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commit 9ae82ccb26be0155ad81b2630090e85639a0dc56
Author: Chris Lalancette <clalance@redhat.com>
Date:   Fri May 16 15:31:06 2008 -0400

    Fix a modprobe virtio_blk ; rmmod virtio_blk ; modprobe virtio_blk crash;
    this was basically because we weren't doing "del_gendisk()" in the remove
    path.

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 4962e62..c678ac5 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -294,6 +294,7 @@ static void virtblk_remove(struct virtio_device *vdev)
 	vdev->config->reset(vdev);
 
 	blk_cleanup_queue(vblk->disk->queue);
+	del_gendisk(vblk->disk);
 	put_disk(vblk->disk);
 	unregister_blkdev(major, "virtblk");
 	mempool_destroy(vblk->pool);