netdev - [PATCH net-next 08/16] ibmveth: Don't receive packets when the napi budget == 0

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Message-ID: <87siqkxog9.fsf_-_@xmission.com>
Date:	Fri, 14 Mar 2014 18:03:50 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	David Miller <davem@...emloft.net>
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org,
	xiyou.wangcong@...il.com, mpm@...enic.com, satyam.sharma@...il.com
Subject: [PATCH net-next 08/16] ibmveth: 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@...ssion.com>
---
 drivers/net/ethernet/ibm/ibmveth.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
index 4be971590461..abb95b21c4a7 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1062,7 +1062,7 @@ static int ibmveth_poll(struct napi_struct *napi, int budget)
 	unsigned long lpar_rc;
 
 restart_poll:
-	do {
+	while (frames_processed < budget) {
 		if (!ibmveth_rxq_pending_buffer(adapter))
 			break;
 
@@ -1111,7 +1111,7 @@ restart_poll:
 			netdev->stats.rx_bytes += length;
 			frames_processed++;
 		}
-	} while (frames_processed < budget);
+	}
 
 	ibmveth_replenish_task(adapter);
 
-- 
1.7.5.4

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