Commit 64b4cc39 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by Rusty Russell
Browse files

9p/trans_virtio: enable VQs early 



virtio spec requires drivers to set DRIVER_OK before using VQs.
This is set automatically after probe returns, but virtio 9p device
adds self to channel list within probe, at which point VQ can be
used in violation of the spec.

To fix, call virtio_device_ready before using VQs.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent f5866db6

net/9p/trans_virtio.c

+2 −0
Original line number Diff line number Diff line
@@ -575,6 +575,8 @@ static int p9_virtio_probe(struct virtio_device *vdev) 
	/* Ceiling limit to avoid denial of service attacks */

	chan->p9_max_pages = nr_free_buffer_pages()/4;



	virtio_device_ready(vdev);



	mutex_lock(&virtio_9p_lock);

	list_add_tail(&chan->chan_list, &virtio_chan_list);

	mutex_unlock(&virtio_9p_lock);