On Mon, Apr 01, 2019 at 10:58:57AM +0000, Radoslav Gerganov wrote: > On 1.04.2019 13:54, Radoslav Gerganov wrote: > > commit 072684e8c58d17e853f8e8b9f6d9ce2e58d2b036 upstream. > > > > In f_hidg_write() the write_spinlock is acquired before calling > > usb_ep_queue() which causes a deadlock when dummy_hcd is being used. > > This is because dummy_queue() callbacks into f_hidg_req_complete() which > > tries to acquire the same spinlock. This is (part of) the backtrace when > > the deadlock occurs: > > > > This is the backport of commit 072684e8c to the stable 4.9 branch. > I missed to point that in the subject line, sorry. Not a problem at all, thanks for the backport, now queued up. greg k-h
