tilegx: Don't receive packets when the napi budget == 0

Processing any incoming packets with a with a napi budget of 0
is incorrect driver behavior.

This matters as netpoll will shortly call drivers with a budget of 0
to avoid receive packet processing happening in hard irq context.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/ethernet/tile/tilegx.c b/drivers/net/ethernet/tile/tilegx.c
index 17503da9f7a5..b43f1b3b9632 100644
--- a/drivers/net/ethernet/tile/tilegx.c
+++ b/drivers/net/ethernet/tile/tilegx.c
@@ -659,6 +659,9 @@ static int tile_net_poll(struct napi_struct *napi, int budget)
         struct info_mpipe *info_mpipe =
                 container_of(napi, struct info_mpipe, napi);
 
+        if (budget <= 0)
+                goto done;
+
         instance = info_mpipe->instance;
         while ((n = gxio_mpipe_iqueue_try_peek(
                         &info_mpipe->iqueue,