Commit 765c0f90 authored by Boris Ostrovsky's avatar Boris Ostrovsky Committed by Greg Kroah-Hartman

xen-netfront: Delete rx_refill_timer in xennet_disconnect_backend()

commit 74470954 upstream.

rx_refill_timer should be deleted as soon as we disconnect from the
backend since otherwise it is possible for the timer to go off before
we get to xennet_destroy_queues(). If this happens we may dereference
queue->rx.sring which is set to NULL in xennet_disconnect_backend().
Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e7f9f10b
......@@ -1397,6 +1397,8 @@ static void xennet_disconnect_backend(struct netfront_info *info)
for (i = 0; i < num_queues && info->queues; ++i) {
struct netfront_queue *queue = &info->queues[i];
del_timer_sync(&queue->rx_refill_timer);
if (queue->tx_irq && (queue->tx_irq == queue->rx_irq))
unbind_from_irqhandler(queue->tx_irq, queue);
if (queue->tx_irq && (queue->tx_irq != queue->rx_irq)) {
......@@ -1751,7 +1753,6 @@ static void xennet_destroy_queues(struct netfront_info *info)
if (netif_running(info->netdev))
napi_disable(&queue->napi);
del_timer_sync(&queue->rx_refill_timer);
netif_napi_del(&queue->napi);
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment