virtio_net: workaround for lockdep checker issue

This is just a workaround, see the thread [1] on the netdev mailing list for the discussion around this issue. But it allows us to avoid the initial lockdep warning on boot that disables futher lockdep checks. [1] https://www.spinics.net/lists/netdev/msg529595.html Signed-off-by: Octavian Purdila <[email protected]>
valighita · Feb 8, 2021 · 6b6127c · 6b6127c
1 parent b40e9b6
commit 6b6127c
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
@@ -1259,9 +1259,11 @@ static bool try_fill_recv(struct virtnet_info *vi, struct receive_queue *rq,
 	if (virtqueue_kick_prepare(rq->vq) && virtqueue_notify(rq->vq)) {
 		unsigned long flags;
 
+		local_bh_disable();
 		flags = u64_stats_update_begin_irqsave(&rq->stats.syncp);
 		rq->stats.kicks++;
 		u64_stats_update_end_irqrestore(&rq->stats.syncp, flags);
+		local_bh_enable();
 	}
 
 	return !oom;