8139cp: 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
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
index a3c1daa7ad5c..2bc728e65e24 100644
--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -476,7 +476,7 @@ rx_status_loop:
         rx = 0;
         cpw16(IntrStatus, cp_rx_intr_mask);
 
-        while (1) {
+        while (rx < budget) {
                 u32 status, len;
                 dma_addr_t mapping, new_mapping;
                 struct sk_buff *skb, *new_skb;
@@ -554,9 +554,6 @@ rx_next:
                 else
                         desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
                 rx_tail = NEXT_RX(rx_tail);
-
-                if (rx >= budget)
-                        break;
         }
 
         cp->rx_tail = rx_tail;