Messages in this thread | | | Date | Mon, 30 Nov 2015 03:07:31 +0100 | From | Andrew Lunn <> | 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
| |