On Tue, 2009-02-17 at 10:16 +0100, Sebastian Andrzej Siewior wrote: > Catalin Marinas wrote: > > I get occasional oopses in the enqueue_an_ATL_packet() function because > > skip_map is empty. This seem to happen when I unplug a USB device, > > otherwise it works fine. It's a bit strange as skip_map is written in > > the calling function, do_atl_int(). > > > > Any quick thoughts on what may be wrong (with the software or hardware)? > I'm not real sure what is going on there, a few other people reported this > also. They worked around this by adding an udelay(1) before the read of > the skip register. That is probably a timming issue but I dunno which one. It looks like a timing issue. I added a do...while() loop for reading the skip_map register and it seems to be reliable. Without it it crashes in 50% of the cases when I unplug the device. If you are OK with this approach, I'll send a patch later today. Thanks. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
