Hi Stanislaw, > Stanislaw Gruszka <sgruszka@xxxxxxxxxx> hat am 12. Februar 2019 um 10:30 geschrieben: > > > > In usb_sg_init() urb->num_sgs is set 0 for sg_tablesize = 0 controllers. > In mt76 we set urb->num_sgs to 1. I thought it is fine, but now I think > this is bug. We can fix that without changing allocation method and > still use SG allocation. Attached patch do this, please check if it works > on rpi. Patch is on top of your error path fixes. your patch didn't apply cleanly to yesterdays next. After some minor manual fixup, i was able to build them and here are the results starting from boot (please ignore the invalid time in the kernel log): https://gist.github.com/lategoodbye/33bd5bc75b9fc935faa231bc472defa8 Using multi_v7_defconfig i'm getting a warning on the first connect and always this flood of rx urb failed on disconnect. The driver seems to probe but isn't functional even after 2 tries. Using arm64_defconfig i don't get any warning. But except of this i'm getting similiar results to multi_v7_defconfig. So in comparison, Lorenzo's workaround behaves better. Stefan > > Stanislaw
