linux-kernel - [PATCH 4.2 05/30] net: eth: altera: fix napi poll

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Message-Id: <20151001092038.434165118@linuxfoundation.org>
Date:	Thu,  1 Oct 2015 11:21:27 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Atsushi Nemoto <nemoto@...hiba-tops.co.jp>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.2 05/30] net: eth: altera: fix napi poll_list corruption

4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Atsushi Nemoto <nemoto@...hiba-tops.co.jp>

[ Upstream commit 4548a697e4969d695047cebd6d9af5e2f6cc728e ]

tse_poll() calls __napi_complete() with irq enabled.  This leads napi
poll_list corruption and may stop all napi drivers working.
Use napi_complete() instead of __napi_complete().

Signed-off-by: Atsushi Nemoto <nemoto@...hiba-tops.co.jp>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/altera/altera_tse_main.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/net/ethernet/altera/altera_tse_main.c
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -511,8 +511,7 @@ static int tse_poll(struct napi_struct *
 
 	if (rxcomplete < budget) {
 
-		napi_gro_flush(napi, false);
-		__napi_complete(napi);
+		napi_complete(napi);
 
 		netdev_dbg(priv->dev,
 			   "NAPI Complete, did %d packets with budget %d\n",


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