9p/trans_virtio: reset virtio device on remove

On device shutdown/removal, virtio drivers need to trigger a reset on
the device; if this is neglected, the virtio core will complain about
non-zero device status.

This patch resets the status when the 9p virtio driver is removed
from the system by calling vdev->config->reset on the virtio_device
to send a reset to the host virtio device.

Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 9dd49ca67dbc22a905999de21b8355475ba40052..6e70ddb158b4bc121a0f32e7a53fecf8125e8354 100644 (file)
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -704,6 +704,7 @@ static void p9_virtio_remove(struct virtio_device *vdev)
 
        mutex_unlock(&virtio_9p_lock);
 
+       vdev->config->reset(vdev);
        vdev->config->del_vqs(vdev);
 
        sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);