virtio-blk: free vblk-vqs in error path of virtblk_probe()

Else there will be memory leak if alloc_disk() fails.

Fixes: 6a27b65 ("block: virtio-blk: support multi virt queues per virtio-blk device")
Signed-off-by: Hou Tao <[email protected]>
Reviewed-by: Stefano Garzarella <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

Author: Hou Tao

drivers/block/virtio_blk.c

@@ -878,6 +878,7 @@ static int virtblk_probe(struct virtio_device *vdev)
 	put_disk(vblk->disk);
 out_free_vq:
 	vdev->config->del_vqs(vdev);
+	kfree(vblk->vqs);
 out_free_vblk:
 	kfree(vblk);
 out_free_index: