On Thu, Jan 26, 2012 at 08:31:57PM +0100, Bjørn Mork wrote: > Greg KH <greg@xxxxxxxxx> writes: > > On Wed, Jan 25, 2012 at 08:34:22PM +0100, Bjørn Mork wrote: > >> We're holding the global wdm_mutex through most of wdm_open, including > >> when it calls usb_autopm_get_interface. This call can block waiting for > >> a resume, which will need to look up the device list. So we deadlock. > >> > >> Fix by using a dedicated lock for the device list. > >> > >> Signed-off-by: Bjørn Mork <bjorn@xxxxxxx> > >> --- > >> v2: A spinlock makes more sense here, as pointed out by Oliver Neukum > > > > Oliver, any objection to me applying this patch? > > Please note that it requires the "usb: cdc-wdm: subdriver support" > series which I think still is under review. It should really have been > part of that series. Sorry for not catching the bug in time. Ok, thanks, I'll drop this from my queue and wait for all of that to settle down. greg k-h -- 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
