lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20210412084016.544172287@linuxfoundation.org>
Date:   Mon, 12 Apr 2021 10:38:41 +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,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.11 016/210] net: dsa: lantiq_gswip: Let GSWIP automatically set the xMII clock

From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>

commit 3e6fdeb28f4c331acbd27bdb0effc4befd4ef8e8 upstream.

The xMII interface clock depends on the PHY interface (MII, RMII, RGMII)
as well as the current link speed. Explicitly configure the GSWIP to
automatically select the appropriate xMII interface clock.

This fixes an issue seen by some users where ports using an external
RMII or RGMII PHY were deaf (no RX or TX traffic could be seen). Most
likely this is due to an "invalid" xMII clock being selected either by
the bootloader or hardware-defaults.

Fixes: 14fceff4771e51 ("net: dsa: Add Lantiq / Intel DSA driver for vrx200")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/dsa/lantiq_gswip.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -811,10 +811,15 @@ static int gswip_setup(struct dsa_switch
 	/* Configure the MDIO Clock 2.5 MHz */
 	gswip_mdio_mask(priv, 0xff, 0x09, GSWIP_MDIO_MDC_CFG1);
 
-	/* Disable the xMII link */
-	for (i = 0; i < priv->hw_info->max_ports; i++)
+	for (i = 0; i < priv->hw_info->max_ports; i++) {
+		/* Disable the xMII link */
 		gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_EN, 0, i);
 
+		/* Automatically select the xMII interface clock */
+		gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_RATE_MASK,
+				   GSWIP_MII_CFG_RATE_AUTO, i);
+	}
+
 	/* enable special tag insertion on cpu port */
 	gswip_switch_mask(priv, 0, GSWIP_FDMA_PCTRL_STEN,
 			  GSWIP_FDMA_PCTRLp(cpu_port));


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ