gro: Flush GRO packets in napi_disable_pending path

When NAPI is disabled while we're in net_rx_action, we end up
calling __napi_complete without flushing GRO packets.  This is
a bug as it would cause the GRO packets to linger, of course it
also literally BUGs to catch error like this :)

This patch changes it to napi_complete, with the obligatory IRQ
reenabling.  This should be safe because we've only just disabled
IRQs and it does not materially affect the test conditions in
between.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 3 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 60b572812278..70c27e0c7c32 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2823,9 +2823,11 @@ static void net_rx_action(struct softirq_action *h)
                  * move the instance around on the list at-will.
                  */
                 if (unlikely(work == weight)) {
-                        if (unlikely(napi_disable_pending(n)))
-                                __napi_complete(n);
-                        else
+                        if (unlikely(napi_disable_pending(n))) {
+                                local_irq_enable();
+                                napi_complete(n);
+                                local_irq_disable();
+                        } else
                                 list_move_tail(&n->poll_list, list);
                 }