linux-kernel - [PATCH 5.16 0918/1039] net: usb: Correct reset handling of smsc95xx

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Date:   Mon, 24 Jan 2022 19:45:07 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Gabriel Hojda <ghojda@...urs.ro>,
        Markus Reichl <m.reichl@...etechno.de>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.16 0918/1039] net: usb: Correct reset handling of smsc95xx

From: Markus Reichl <m.reichl@...etechno.de>

commit 0bf3885324a8599e3af4c7379b8d4f621c9bbffa upstream.

On boards with LAN9514 and no preconfigured MAC address we don't get an
ip address from DHCP after commit a049a30fc27c ("net: usb: Correct PHY handling
of smsc95xx") anymore. Adding an explicit reset before starting the phy
fixes the issue.

[1]
https://lore.kernel.org/netdev/199eebbd6b97f52b9119c9fa4fd8504f8a34de18.camel@collabora.com/

From: Gabriel Hojda <ghojda@...urs.ro>
Fixes: a049a30fc27c ("net: usb: Correct PHY handling of smsc95xx")
Signed-off-by: Gabriel Hojda <ghojda@...urs.ro>
Signed-off-by: Markus Reichl <m.reichl@...etechno.de>
Tested-by: Alexander Stein <alexander.stein@...tq-group.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/usb/smsc95xx.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1962,7 +1962,8 @@ static const struct driver_info smsc95xx
 	.bind		= smsc95xx_bind,
 	.unbind		= smsc95xx_unbind,
 	.link_reset	= smsc95xx_link_reset,
-	.reset		= smsc95xx_start_phy,
+	.reset		= smsc95xx_reset,
+	.check_connect	= smsc95xx_start_phy,
 	.stop		= smsc95xx_stop,
 	.rx_fixup	= smsc95xx_rx_fixup,
 	.tx_fixup	= smsc95xx_tx_fixup,