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Message-ID: <1412525038-15871-16-git-send-email-mst@redhat.com> Date: Sun, 5 Oct 2014 19:07:33 +0300 From: "Michael S. Tsirkin" <mst@...hat.com> To: linux-kernel@...r.kernel.org Cc: Eric Van Hensbergen <ericvh@...il.com>, Ron Minnich <rminnich@...dia.gov>, Latchesar Ionkov <lucho@...kov.net>, "David S. Miller" <davem@...emloft.net>, v9fs-developer@...ts.sourceforge.net, netdev@...r.kernel.org Subject: [PATCH 15/16] 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_early_enable_vqs before using VQs. Signed-off-by: Michael S. Tsirkin <mst@...hat.com> --- net/9p/trans_virtio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index 6940d8f..0e8bbb3 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -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_early_enable_vqs(vdev); + mutex_lock(&virtio_9p_lock); list_add_tail(&chan->chan_list, &virtio_chan_list); mutex_unlock(&virtio_9p_lock); -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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