netdev - [PATCH] ibmveth: enable interrupts after napi

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Message-Id: <1425953739-30149-1-git-send-email-yongbae2@gmail.com>
Date:	Tue, 10 Mar 2015 11:15:39 +0900
From:	Yongbae Park <yongbae2@...il.com>
To:	msink@...monline.ru
Cc:	davem@...emloft.net, nicolas.ferre@...el.com, tklauser@...tanz.ch,
	wsa@...-dreams.de, varkabhadram@...il.com, netdev@...r.kernel.org
Subject: [PATCH] ibmveth: enable interrupts after napi_complete()

The interrupt is enabled before napi_complete(). A network timeout
occurs if the interrupt handler is called before napi_complete().

Fix the bug by enabling the interrupt after napi_complete().

Signed-off-by: Yongbae Park <yongbae2@...il.com>
---
 drivers/net/ethernet/ibm/ibmveth.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
index 21978cc..edcb4c7 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1136,6 +1136,8 @@ restart_poll:
 	ibmveth_replenish_task(adapter);
 
 	if (frames_processed < budget) {
+		napi_complete(napi);
+
 		/* We think we are done - reenable interrupts,
 		 * then check once more to make sure we are done.
 		 */
@@ -1144,8 +1146,6 @@ restart_poll:
 
 		BUG_ON(lpar_rc != H_SUCCESS);
 
-		napi_complete(napi);
-
 		if (ibmveth_rxq_pending_buffer(adapter) &&
 		    napi_reschedule(napi)) {
 			lpar_rc = h_vio_signal(adapter->vdev->unit_address,
-- 
1.9.1

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