[PATCH] net: fec: set mac address unconditionally

Fixes: 9638d19e4816 ("net: fec: add netif status check before set mac address")

If the mac address origin is not dt, you can only safe assign a
mac address after "link up" of the device. If the link is down the
clocks are disabled and because of issues assigning registers when
clocks are down the new mac address is discarded on some soc's. This fix
sets the mac address unconditionally in fec_restart(...) and ensures
consistens between fec registers and the network layer.

Signed-off-by: Gavin Schenk <redacted>
---
 drivers/net/ethernet/freescale/fec_main.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 2a03857cca18..bdabea6cd981 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c

@@ -903,13 +903,11 @@ fec_restart(struct net_device *ndev)
 	 * enet-mac reset will reset mac address registers too,
 	 * so need to reconfigure it.
 	 */
-	if (fep->quirks & FEC_QUIRK_ENET_MAC) {
-		memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN);
-		writel((__force u32)cpu_to_be32(temp_mac[0]),
-		       fep->hwp + FEC_ADDR_LOW);
-		writel((__force u32)cpu_to_be32(temp_mac[1]),
-		       fep->hwp + FEC_ADDR_HIGH);
-	}
+	memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN);
+	writel((__force u32)cpu_to_be32(temp_mac[0]),
+	       fep->hwp + FEC_ADDR_LOW);
+	writel((__force u32)cpu_to_be32(temp_mac[1]),
+	       fep->hwp + FEC_ADDR_HIGH);
 
 	/* Clear any outstanding interrupt. */
 	writel(0xffffffff, fep->hwp + FEC_IEVENT);

-- 
1.9.1


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From: Gavin Schenk <redacted> Sent: Wednesday, September 21, 2016 9:31 PM

To: Andy Duan <redacted>
Cc: netdev@vger.kernel.org; kernel@pengutronix.de; Gavin Schenk
[off-list ref]
Subject: [PATCH] net: fec: set mac address unconditionally

Fixes: 9638d19e4816 ("net: fec: add netif status check before set mac
address")

If the mac address origin is not dt, you can only safe assign a mac address
after "link up" of the device. If the link is down the clocks are disabled and
because of issues assigning registers when clocks are down the new mac
address is discarded on some soc's. This fix sets the mac address
unconditionally in fec_restart(...) and ensures consistens between fec
registers and the network layer.

Signed-off-by: Gavin Schenk <redacted>
---

It make sense, thanks.

Acked-by: Fugang Duan <redacted>

Hello,

just a few nitpicks:

On Wed, Sep 21, 2016 at 03:30:55PM +0200, Gavin Schenk wrote:

Fixes: 9638d19e4816 ("net: fec: add netif status check before set mac address")

This line belongs to in the S-o-B area below.

If the mac address origin is not dt, you can only safe assign a

s/safe/safely/

mac address after "link up" of the device. If the link is down the
clocks are disabled and because of issues assigning registers when
clocks are down the new mac address is discarded on some soc's. This fix

s/down/off/; s/is discarded/cannot be written in .ndo_set_mac_address()/

sets the mac address unconditionally in fec_restart(...) and ensures
consistens between fec registers and the network layer.

s/consistens/consistency/

Other than that:

Acked-by: Uwe Kleine-König <redacted>

Thanks
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

On Thu, Sep 22, 2016 at 08:08:36AM +0200, Uwe Kleine-König wrote:

Acked-by: Uwe Kleine-König <redacted>

huch, cut and paste borkage: This should be

	Acked-by: Uwe Kleine-König [off-list ref]

of course.

Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |