On Thu, 19 Nov 2015, Ioan-Adrian Ratiu wrote: > First part of lockdep report: > http://imgur.com/clLsCWe > > Second part: > http://imgur.com/Wa2PzRl > > Here are some printk's of mine while reproducing + debugging the issue: > http://imgur.com/SETOHT7 So the real problem is that Intuos driver is calling hid_hw_request() (which tries to grab the lock in usbhid_submit_report()) while handling the CTRL IRQ (lock gets acquired there). So the proper way to fix seems to be delaying the scheduling of the proximity read event in wacom_intuos_inout() to workqueue. > I'll continue to research this more in depth, but progress is slow > because I don't have much time, I'm doing this in my spare time because > it's my girlfriend's tablet. Oh, now I understand the level of severity of this bug! :-) Thanks, -- Jiri Kosina SUSE Labs -- 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
