From: Eric W. Biederman Date: Sat, 15 Mar 2014 01:00:06 +0000 (-0700) Subject: igb: Don't receive packets when the napi budget == 0 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=57ba34c9b068f314b219affafc19a39f8735d5e8;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git igb: 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" Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index f81d87cfcc8d..d6b11522fed7 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -6946,7 +6946,7 @@ static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, const int budget) unsigned int total_bytes = 0, total_packets = 0; u16 cleaned_count = igb_desc_unused(rx_ring); - do { + while (likely(total_packets < budget)) { union e1000_adv_rx_desc *rx_desc; /* return some buffers to hardware, one at a time is too slow */ @@ -6998,7 +6998,7 @@ static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, const int budget) /* update budget accounting */ total_packets++; - } while (likely(total_packets < budget)); + } /* place incomplete frames back on ring for completion */ rx_ring->skb = skb;