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
| ||
|
Date: Mon, 30 Nov 2015 03:07:31 +0100 From: Andrew Lunn <andrew@...n.ch> To: Lothar Waßmann <LW@...O-electronics.de> Cc: "David S. Miller" <davem@...emloft.net>, Fabio Estevam <fabio.estevam@...escale.com>, Kevin Hao <haokexin@...il.com>, Lucas Stach <l.stach@...gutronix.de>, Nimrod Andy <B38611@...escale.com>, Philippe Reynes <tremyfr@...il.com>, Russell King <rmk+kernel@....linux.org.uk>, Uwe Kleine-König <u.kleine-koenig@...gutronix.de>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, Stefan Agner <stefan@...er.ch> Subject: Re: [PATCH] net: fec: fix enet_out clock handling On Fri, Nov 27, 2015 at 02:39:10PM +0100, Lothar Waßmann wrote: > When ENET_OUT is being used as reference clock for an external PHY, > the clock must not be disabled while the PHY is active. Otherwise the > PHY may lose its internal state and require a reset to become > functional again. > > A symptom for this bug is a network interface that constantly toggles > between UP and DOWN state: > fec 800f0000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx > fec 800f0000.ethernet eth0: Link is Down > fec 800f0000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx > fec 800f0000.ethernet eth0: Link is Down Hi Lothar When does this up/down happen? During normal operation when the link is administrative up? When did this start happening? Did it happen before 8fff755e9f8d net: fec: Ensure clocks are enabled while using mdio bus Andrew -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists