On Mon, May 13, 2019 at 7:08 AM Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx> wrote: > W dniu 09.05.2019 o 23:23, John Stultz pisze: > > So yes, the kzalloc/memset patch is a clear improvement, as it avoids > > the bootup crash on dwc2, and seems like it should go in. > > > > However, there is still the outstanding issue w/ functionfs sg > > support stalling on larger transfers. > > Do you get "functionfs read size 512 > requested size 24, splitting > request into multiple reads" message when problems happen? Unfortunately no. > Is there anything in the kernel log? Nope. Just the transfers stall/hang and further attempts at adb connections fail until the USB cable is unplugged and replugged. > I'm unable to reproduce your problems. I thought I was able, but > it was another problem, which is fixed with: > > 5acb4b970184d189d901192d075997c933b82260 > dwc2: gadget: Fix completed transfer size calculation in DDMA > > (or you can simply take upstream drivers/usb/dwc2). Yea, I'm able to test against mainline. I can give this a whirl, but since it affects multiple drivers, I suspect the trouble is in the f_fs code, not just dwc2. > Do your problems happen on dwc2 or dwc3? The transfer hangs happen on *both* dwc2 and dwc3. And on both we can use a similar workaround of disabling sg_supported to get by. https://git.linaro.org/people/john.stultz/android-dev.git/commit/?h=dev/hikey-mainline-WIP&id=21dfaac615f1f287377897804cbfe69450d489e3 https://git.linaro.org/people/john.stultz/android-dev.git/commit/?h=dev/hikey960-mainline-WIP&id=5b70ec4ae1c06ae700fcca7141130c71e205fa1c > Is there a way to try your adb without building and running the > whole Android? Maybe? I have heard of folks doing it in the past, though I don't really know a quick path to get there. Is there anything else I can try for you? thanks -john
