virtio: fix module/device unloading

The virtio code never hooked through the ->remove callback.  Although
noone supports device removal at the moment, this code is already
needed for module unloading.

This of course also revealed bugs in virtio_blk, virtio_net and lguest
unloading paths.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 66f38722253a..e2eec38c83c2 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -247,6 +247,8 @@ static void lg_del_vq(struct virtqueue *vq)
 {
         struct lguest_vq_info *lvq = vq->priv;
 
+        /* Release the interrupt */
+        free_irq(lvq->config.irq, vq);
         /* Tell virtio_ring.c to free the virtqueue. */
         vring_del_virtqueue(vq);
         /* Unmap the pages containing the ring. */