Hello Tim, > I just bootet 2.6.31-rc8-rt9 on the phycore-imx35 development board, > without any additional patches. The FEC Ethernet Controller went belly > up, but the system booted nevertheless. [...] The problem is that &fep->mii_lock is taken twice. On a normal (i.e. non-RT) UP system that doesn't hurt because spinlocks are noops (unless you have some debugging code activated). The exact problem is: fec_enet_mii (this takes &fep->mii_lock) and calls mip->mii_func which happens to be mii_queue. mii_queue in turn takes &fep->mii_lock again. The correct fix is probably to split mii_queue into a function that locks and a function that does the actual work. And then use the latter in fec_enet_mii. I'd prepare a patch but my wife just called me to eat some cake :-) So maybe later today or tomorrow, we'll see. Best regards 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
