Am Montag, den 21.09.2020, 14:52 +0200 schrieb Pavel Machek: > Hi! > > > > Task goes to TASK_INTERRUPTIBLE > > > > > if (retval >= 0) > > > timeout = schedule_timeout(YUREX_WRITE_TIMEOUT); > > > > Task turns into Sleeping Beauty until timeout > > Is there way to do the allocations for submit_urb before the No. In theory you do not even know which HC will get the URB. Preallocating resources is impossible. I do consider this a design bug in the usbcore API. > prepare_to_wait? GFP_ATOMIC would be nice to avoid... and doing > GFP_ATOMIC from normal process context just because of task_state > seems ... wrong. Well, then you will need to change the rest of the logic and use a struct completion. Give the age and practical relevance of the driver I would recommend against making such drastic changes and let it just be in its awkward but correct state. Regards Oliver
