Patch "vsock/virtio: enable VQs early on probe" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    vsock/virtio: enable VQs early on probe

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     vsock-virtio-enable-vqs-early-on-probe.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit e891c5280d0666a3e5c32e768c839a5e0b6127bf
Author: Stefano Garzarella <sgarzare@xxxxxxxxxx>
Date:   Wed Mar 23 18:36:25 2022 +0100

    vsock/virtio: enable VQs early on probe
    
    [ Upstream commit 88704454ef8b00ea91537ae0d47d9348077e0e72 ]
    
    virtio spec requires drivers to set DRIVER_OK before using VQs.
    This is set automatically after probe returns, but virtio-vsock
    driver uses VQs in the probe function to fill rx and event VQs
    with new buffers.
    
    Let's fix this, calling virtio_device_ready() before using VQs
    in the probe function.
    
    Fixes: 0ea9e1d3a9e3 ("VSOCK: Introduce virtio_transport.ko")
    Signed-off-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
    Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
    Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 4a8548bdf86c..c5f936fbf876 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -627,6 +627,8 @@ static int virtio_vsock_probe(struct virtio_device *vdev)
 
 	vdev->priv = vsock;
 
+	virtio_device_ready(vdev);
+
 	mutex_lock(&vsock->tx_lock);
 	vsock->tx_run = true;
 	mutex_unlock(&vsock->tx_lock);