tilepro: 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>

diff --git a/drivers/net/ethernet/tile/tilepro.c b/drivers/net/ethernet/tile/tilepro.c
index 7e33973..b94449b 100644 (file)
--- a/drivers/net/ethernet/tile/tilepro.c
+++ b/drivers/net/ethernet/tile/tilepro.c
@@ -831,6 +831,9 @@ static int tile_net_poll(struct napi_struct *napi, int budget)
 
        unsigned int work = 0;
 
+       if (budget <= 0)
+               goto done;
+
        while (priv->active) {
                int index = qup->__packet_receive_read;
                if (index == qsp->__packet_receive_queue.__packet_write)