Hi, > it seems as if the FEC ethernet driver of the phycore pcm043 freescale imx35 is unhappy. > If there is an easy way to test this i would give it a try. This is already fixed in mainline. (And you were Cc:d for the two most relevant patches!) $ git lg v2.6.31.12-rt20..linus/master -- drivers/net/fec.c 78abcb1 net: fix section mismatch in fec.c 66bc4a6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 4980296 m68knommu: remove ColdFire direct interrupt register access 81538e7 fec: don't enable irqs in hard irq context 84177a2 fec: fix recursive locking of mii_lock aa11d95 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 da81203 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 6ed1065 net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functions 84177a2 and 81538e7 are the important ones for you, I didn't check the others. Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html