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8139cp: Don't receive packets when the napi budget == 0

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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>
This commit is contained in:
Eric W. Biederman 2014-03-11 14:31:43 -07:00 committed by David S. Miller
parent 310c4d4e23
commit 50ff44be40
1 changed files with 1 additions and 4 deletions
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5
drivers/net/ethernet/realtek/8139cp.c
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@ -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;