diff mbox

[net-next,03/16] igb: Don't receive packets when the napi budget == 0

Message ID 87k3bwz36x.fsf_-_@xmission.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Eric W. Biederman March 15, 2014, 1 a.m. UTC 
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>
---
 drivers/net/ethernet/intel/igb/igb_main.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 340a3449e1e9..973224e43b11 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;