On Wed, 29 Apr 2015, Petr Mladek wrote: > On Wed 2015-04-29 09:18:50, Chris Bainbridge wrote: > > Regression in commit 638139eb95d2d241781330a321e88c8dafe46078 > > Author: Petr Mladek <pmladek@xxxxxxx> > > Date: Fri Sep 19 17:32:24 2014 +0200 > > > > usb: hub: allow to process more usb hub events in parallel > > Anyway, I would suggest to revert this commit. I wonder where I had my > head when I sent it. > > It seems that the other operations with udev->portnum and > bus->devnum_next are not guared by bus->usb_address0_mutex. > And it seems that this is not the only operation that need to > be serialized. What other operations are you thinking of? In general, drivers should not depend on hub operations being serialized. If they do, it's a bug and it should be fixed. Alan Stern -- 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
