diff mbox series

[5.8,008/633] net: fec: Fix PHY init after phy_reset_after_clk_enable()

Message ID 20201027135523.079614702@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Oct. 27, 2020, 1:45 p.m. UTC 
From: Marek Vasut <marex@denx.de>

[ Upstream commit 0da1ccbbefb662915228bc17e1c7d4ad28b3ddab ]

The phy_reset_after_clk_enable() does a PHY reset, which means the PHY
loses its register settings. The fec_enet_mii_probe() starts the PHY
and does the necessary calls to configure the PHY via PHY framework,
and loads the correct register settings into the PHY. Therefore,
fec_enet_mii_probe() should be called only after the PHY has been
reset, not before as it is now.

Fixes: 1b0a83ac04e3 ("net: fec: add phy_reset_after_clk_enable() support")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/fec_main.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff mbox series

Patch

--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3006,17 +3006,17 @@  fec_enet_open(struct net_device *ndev)
 	/* Init MAC prior to mii bus probe */
 	fec_restart(ndev);
 
-	/* Probe and connect to PHY when open the interface */
-	ret = fec_enet_mii_probe(ndev);
-	if (ret)
-		goto err_enet_mii_probe;
-
 	/* Call phy_reset_after_clk_enable() again if it failed during
 	 * phy_reset_after_clk_enable() before because the PHY wasn't probed.
 	 */
 	if (reset_again)
 		fec_enet_phy_reset_after_clk_enable(ndev);
 
+	/* Probe and connect to PHY when open the interface */
+	ret = fec_enet_mii_probe(ndev);
+	if (ret)
+		goto err_enet_mii_probe;
+
 	if (fep->quirks & FEC_QUIRK_ERR006687)
 		imx6q_cpuidle_fec_irqs_used();