From: Anton Vorontsov <avoront...@ru.mvista.com> Date: Fri, 11 Sep 2009 01:48:12 +0400
> MPC8360 QE UCC ethernet controllers hang when changing link duplex > under a load (a bit of NFS activity is enough). > > PHY: m...@e0102120:00 - Link is Up - 1000/Full > sh-3.00# ethtool -s eth0 speed 100 duplex half autoneg off > PHY: m...@e0102120:00 - Link is Down > PHY: m...@e0102120:00 - Link is Up - 100/Half > NETDEV WATCHDOG: eth0 (ucc_geth): transmit queue 0 timed out > ------------[ cut here ]------------ > Badness at c01fcbd0 [verbose debug info unavailable] > NIP: c01fcbd0 LR: c01fcbd0 CTR: c0194e44 > ... > > The cure is to disable the controller before changing speed/duplex > and enable it afterwards. > > Though, disabling the controller might take quite a while, so we > better not grab any spinlocks in adjust_link(). Instead, we quiesce > the driver's activity, and only then disable the controller. > > Signed-off-by: Anton Vorontsov <avoront...@ru.mvista.com> Applied. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
