Fix crash in virtio_blk during modprobe ; rmmod ; modprobe

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>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (moved del_gendisk up)

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 84e064ffee52..c4804f3465db 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -311,6 +311,7 @@ static void virtblk_remove(struct virtio_device *vdev)
         /* Stop all the virtqueues. */
         vdev->config->reset(vdev);
 
+        del_gendisk(vblk->disk);
         blk_cleanup_queue(vblk->disk->queue);
         put_disk(vblk->disk);
         mempool_destroy(vblk->pool);