> > > And then two cases of "Transmit Event FIFO buffer full" along with the > > > requested > > > coredump. > > Will work on this next but didn't have a chance yet. > > Ok, looking at the traces this doesn't seem to be connected to the issue. Whoops, most of the email was wrong - I mixed up fifos and looked at RX UINC instead of TX FIFO Uincs. Below is the real SPI sequence of UINCs for TX and TEF and that looks ok. Now, the only time FIFOsta is read (and hence a full TEF reported is in the mcp251xfd_handle_tefif_recover function - and at this point in time the TEF just happens to be full in your case, which is still not an issue but by design. An overflow would be an issue. "1.706 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","342458" "1.730 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","347322" "1.798 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","360950" "2.229 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","447008" "2.237 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "2.243 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "2.250 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "2.322 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","465753" "2.384 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","478142" "2.467 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "2.473 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "2.839 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","569023" "2.899 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","581155" "2.947 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","590637" "3.027 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "3.033 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "3.094 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "3.101 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "3.157 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","632642" "3.267 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "4.219 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","844967" "4.243 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","849849" "4.312 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","863599" "4.726 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","946550" "4.735 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "4.741 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "4.747 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "4.820 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","965234" "4.881 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","977548" "4.968 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "4.975 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "5.336 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1068483" "5.394 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1080029" "5.464 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1094110" "5.518 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "5.524 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "5.592 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "5.598 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "5.665 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1134219" "5.774 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "6.736 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1348375" "6.760 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1353238" "6.849 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1370964" "7.247 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1450675" "7.280 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "7.286 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "7.292 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "7.362 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1473706" "7.424 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1486008" "7.493 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "7.500 ms","SPI","MOSI transfers","MOSI transfer","A0 41 "7.864 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1574021" "7.921 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1585562" "7.977 ms","SPI","MOSI transfers","MOSI transfer","A0 75 01 03 00 99","1596673" Thomas
