linux-kernel - [PATCH v2] net: fec: Fix multicast list setup in fec

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Date:	Thu, 27 Jun 2013 21:18:23 +0200
From:	Christoph Muellner <christoph.muellner@...obroma-systems.com>
To:	Fabio Estevam <festevam@...il.com>, linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	"David S . Miller" <davem@...emloft.net>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	netdev@...r.kernel.org
Cc:	Christoph Muellner <christoph.muellner@...obroma-systems.com>
Subject: [PATCH v2] net: fec: Fix multicast list setup in fec_restart().

Setup the multicast list of the net_device instead of
clearing it blindly. This restores the multicast groups
in case of a link down/up event or when resuming from
suspend.

Signed-off-by: Christoph Muellner <christoph.muellner@...obroma-systems.com>
---
Changes since v1:
- Adapt the comment to the code change

 drivers/net/ethernet/freescale/fec_main.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index d48099f..4c32709 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -60,6 +60,8 @@
 
 #include "fec.h"
 
+static void set_multicast_list(struct net_device *ndev);
+
 #if defined(CONFIG_ARM)
 #define FEC_ALIGNMENT	0xf
 #else
@@ -471,9 +473,8 @@ fec_restart(struct net_device *ndev, int duplex)
 	/* Clear any outstanding interrupt. */
 	writel(0xffc00000, fep->hwp + FEC_IEVENT);
 
-	/* Reset all multicast.	*/
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
+	/* Setup multicast filter. */
+	set_multicast_list(ndev);
 #ifndef CONFIG_M5272
 	writel(0, fep->hwp + FEC_HASH_TABLE_HIGH);
 	writel(0, fep->hwp + FEC_HASH_TABLE_LOW);
-- 
1.8.3.1

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