Am Donnerstag, den 23.04.2020, 12:29 -0400 schrieb Alan Stern: > On Thu, 23 Apr 2020, Oliver Neukum wrote: > The only suspicious thing I see is that usblp_resume() calls > handle_bidir() without first acquiring any mutex. But resume shouldn't > race with disconnect. Right. > The only other place where read URBs get submitted is under > usblp_read(), which does acquire the mutex Right. > and checks for disconnection > while holding it. Where? It should, but I do not see where it does so. Regards Oliver