tc35815: 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" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/ethernet/toshiba/tc35815.c b/drivers/net/ethernet/toshiba/tc35815.c
index 88e9c73cebc015b9a31b169b973911f92ef8a9d8..fef5573dbfcac0f6db7c44be4124fd04c1fe6587 100644 (file)
--- a/drivers/net/ethernet/toshiba/tc35815.c
+++ b/drivers/net/ethernet/toshiba/tc35815.c
@@ -1645,6 +1645,9 @@ static int tc35815_poll(struct napi_struct *napi, int budget)
        int received = 0, handled;
        u32 status;
 
+       if (budget <= 0)
+               return received;
+
        spin_lock(&lp->rx_lock);
        status = tc_readl(&tr->Int_Src);
        do {