Am Donnerstag, den 15.08.2019, 12:02 +0000 schrieb Schmid, Carsten : > > > I don't think its a regression. > > > > It would be better to know than to assume. > > > > Happens with kernel 4.14.102 also, not only with 4.14.129. > Looks more HW related. > > > > > > Is there something i can do to force an error message to be seen > > > when the ETH2USB adapter stalls? > > > > You can activate dynamic debugging for the xhci_hcd module > > Remember that no data to transfer is not an error as such. > > > > > My current assumption is that the signal quality of the USB port is at a > > > corner case, and therefore some "better" Adapters work, some "bad ones" > > > don't. But as there is no error message seen in the dmesg, i am somehow lost. > > > > Two things you can do: > > > > 1. Generate a usbmon trace (it will be gigantic though) > > 2. Activate dynamic debugging for the xhci_hcd module > > I did: > echo -n 'module xhci_hcd =p' > /sys/kernel/debug/dynamic_debug/control > echo -n 'usbcore =p' > /sys/kernel/debug/dynamic_debug/control > echo 81920 > /sys/kernel/debug/tracing/buffer_size_kb > echo 1 > /sys/kernel/debug/tracing/events/xhci-hcd/enable > (used this when hunting for another USB issue in the past also) > > From traces/logs: > ######################################## > I can see in dmesg at a certain point, i assume this is where trouble starts: > [87800.393785] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.393869] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.393956] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.394045] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.394145] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.394216] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.394302] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.394385] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 15904 bytes untransferred > [87800.394587] xhci_hcd 0000:00:15.0: Transfer error for slot 3 ep 5 on endpoint > [87800.394596] xhci_hcd 0000:00:15.0: Cleaning up stalled endpoint ring > [87800.394600] xhci_hcd 0000:00:15.0: Finding endpoint context > [87800.394603] xhci_hcd 0000:00:15.0: Cycle state = 0x1 > [87800.394606] xhci_hcd 0000:00:15.0: New dequeue segment = ffff8d9330b29900 (virtual) > [87800.394608] xhci_hcd 0000:00:15.0: New dequeue pointer = 0x174213400 (DMA) > [87800.394610] xhci_hcd 0000:00:15.0: Queueing new dequeue state > [87800.394613] xhci_hcd 0000:00:15.0: Set TR Deq Ptr cmd, new deq seg = ffff8d9330b29900 (0x174213000 dma), new deq ptr = ffff8d92b4213400 (0x174213400 dma), new cycle = 1 > [87800.394618] xhci_hcd 0000:00:15.0: // Ding dong! > [87800.394622] xhci_hcd 0000:00:15.0: Giveback URB ffff8d931d65b600, len = 0, expected = 74, status = -71 > [87800.394629] xhci_hcd 0000:00:15.0: Ignoring reset ep completion code of 1 > [87800.394636] xhci_hcd 0000:00:15.0: Successful Set TR Deq Ptr cmd, deq = @174213400 > [87800.394836] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.394916] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395005] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395090] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395178] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395263] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395350] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395436] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395525] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395613] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395710] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395785] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 9808 bytes untransferred > [87800.395868] xhci_hcd 0000:00:15.0: ep 0x82 - asked for 20480 bytes, 11328 bytes untransferred > [87800.398155] xhci_hcd 0000:00:15.0: Transfer error for slot 3 ep 5 on endpoint > [87800.398172] xhci_hcd 0000:00:15.0: Cleaning up stalled endpoint ring > [87800.398175] xhci_hcd 0000:00:15.0: Finding endpoint context > [87800.398179] xhci_hcd 0000:00:15.0: Cycle state = 0x1 > [87800.398181] xhci_hcd 0000:00:15.0: New dequeue segment = ffff8d9330b29900 (virtual) > [87800.398184] xhci_hcd 0000:00:15.0: New dequeue pointer = 0x174213410 (DMA) > [87800.398186] xhci_hcd 0000:00:15.0: Queueing new dequeue state > [87800.398189] xhci_hcd 0000:00:15.0: Set TR Deq Ptr cmd, new deq seg = ffff8d9330b29900 (0x174213000 dma), new deq ptr = ffff8d92b4213410 (0x174213410 dma), new cycle = 1 > [87800.398192] xhci_hcd 0000:00:15.0: // Ding dong! > [87800.398197] xhci_hcd 0000:00:15.0: Giveback URB ffff8d92b4374c00, len = 0, expected = 74, status = -71 > [87800.398209] xhci_hcd 0000:00:15.0: Ignoring reset ep completion code of 1 > [87800.398217] xhci_hcd 0000:00:15.0: Successful Set TR Deq Ptr cmd, deq = @174213410 > [87800.401654] xhci_hcd 0000:00:15.0: Transfer error for slot 3 ep 5 on endpoint This points at a low level XHCI thing. Time to get Mathias involved. Regards Oliver
