Hi, "Howey, Dylan" <Dylan.Howey@xxxxxxxxxxxxx> writes: >> >> > It's also happening in v4.14-rc7. >> >> >> >> Please make sure to also Cc: linux-usb@xxxxxxxxxxxxxxx and send >> >> plain-text emails, also avoid top-posting :-) >> >> >> >> > [ 59.716702] ------------[ cut here ]------------ >> >> > [ 59.721365] WARNING: CPU: 0 PID: 966 at drivers/usb/dwc3/gadget.c:2610 dwc3_stop_active_transfer.constprop.4+0xe8/0xec >> >> > [ 59.732038] Modules linked in: matrix_keypad >> >> > [ 59.736311] CPU: 0 PID: 966 Comm: irq/90-dwc3 Tainted: G W 4.14.0-rc7 #3 >> >> > [ 59.744124] Hardware name: Generic AM43 (Flattened Device Tree) >> >> > [ 59.750029] Backtrace: >> >> > [ 59.752494] [<c010b7e0>] (dump_backtrace) from [<c010bab4>] (show_stack+0x18/0x1c) >> >> > [ 59.760051] r7:00000009 r6:00000000 r5:c0889bd0 r4:00000000 >> >> > [ 59.765707] [<c010ba9c>] (show_stack) from [<c06a1e14>] (dump_stack+0x24/0x28) >> >> > [ 59.772926] [<c06a1df0>] (dump_stack) from [<c0128290>] (__warn+0xe8/0x100) >> >> > [ 59.779877] [<c01281a8>] (__warn) from [<c0128360>] (warn_slowpath_null+0x28/0x30) >> >> > [ 59.787433] r9:00000000 r8:a00e0093 r7:00000002 r6:00000003 r5:ee8b7810 r4:ee8bbf00 >> >> > [ 59.795166] [<c0128338>] (warn_slowpath_null) from [<c04c1c24>] (dwc3_stop_active_transfer.constprop.4+0xe8/0xec) >> >> > [ 59.805413] [<c04c1b3c>] (dwc3_stop_active_transfer.constprop.4) from [<c04c3264>] (__dwc3_gadget_ep_disable+0x24/0x110) >> >> > [ 59.816259] r6:ee8b7810 r5:ee8bbf34 r4:ee8bbf00 >> >> > [ 59.820871] [<c04c3240>] (__dwc3_gadget_ep_disable) from [<c04c371c>] (dwc3_gadget_ep_disable+0x30/0xac) >> >> > [ 59.830332] r7:00000002 r6:ee987638 r5:00000001 r4:200e0093 >> >> > [ 59.835993] [<c04c36ec>] (dwc3_gadget_ep_disable) from [<c04e3800>] (usb_ep_disable+0x30/0x3c) >> >> > [ 59.844585] r5:00000001 r4:ee8bbf00 >> >> > [ 59.848158] [<c04e37d0>] (usb_ep_disable) from [<c04eaa84>] (ffs_func_eps_disable+0x50/0x78) >> >> > [ 59.856576] r5:00000001 r4:ef0cfc80 >> >> > [ 59.860145] [<c04eaa34>] (ffs_func_eps_disable) from [<c04eab84>] (ffs_func_set_alt+0x90/0x290) >> >> > [ 59.868827] r9:5533194a r8:55332309 r7:ee98b254 r6:ffffffff r5:200e0093 r4:ee1f5e64 >> >> > [ 59.876556] [<c04eaaf4>] (ffs_func_set_alt) from [<c04ead9c>] (ffs_func_disable+0x18/0x1c) >> >> > [ 59.884805] r10:ee9f3d14 r9:5533194a r8:55332309 r7:ee98b254 r6:00000000 r5:200e0093 >> >> > [ 59.892615] r4:ee1f5e64 >> >> > [ 59.895145] [<c04ead84>] (ffs_func_disable) from [<c04dd44c>] (composite_disconnect+0x4c/0x94) >> >> >> >> okay, so you're using ffs. I see you're implementing your own HID gadget >> >> on top of FFS. Could it be you have a bug there? Why not use the in-tree >> >> HID function? Can you capture dwc3 logs? More details here: >> >> >> >> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/driver-api/usb/dwc3.rst#n113 >> >> >> > >> > This implementation works on an AM335x platform. >> >> that really doesn't mean much :-) Different controller will behave >> completely differently when it comes to transfer cancellation. >> >> > I should add that the host is Linux v4.4.0 on x86_64. I have not tried any >> > other host yet. >> >> okay. >> >> >> > Attached the dwc3 logs as instructed. >> >> Thank you. >> >> (in below logs, I've removed register access traces to make it easier to read) >> >> Roger, your PHY is toast :-( >> >> irq/90-dwc3-969 [000] d... 52.323145: dwc3_event: event (00000901): Erratic Error [U0] >> irq/90-dwc3-969 [000] d... 52.560646: dwc3_event: event (00000901): Erratic Error [U0] >> irq/90-dwc3-969 [000] d... 52.798144: dwc3_event: event (00000901): Erratic Error [U0] >> irq/90-dwc3-969 [000] d... 53.035646: dwc3_event: event (00000901): Erratic Error [U0] >> irq/90-dwc3-969 [000] d... 53.273143: dwc3_event: event (00000901): Erratic Error [U0] >> irq/90-dwc3-969 [000] d... 53.510657: dwc3_event: event (00000901): Erratic Error [U0] >> irq/90-dwc3-969 [000] d... 53.748142: dwc3_event: event (00000901): Erratic Error [U0] >> irq/90-dwc3-969 [000] d... 53.985640: dwc3_event: event (00000901): Erratic Error [U0] >> >> Seems like your FFS HID is missing Data phase for this clear feature >> request. Either that, or should stall this unknown interface feature >> >> (and seems like I need to figure out a way to add the raw value to the >> trace) >> >> irq/90-dwc3-969 [000] d... 54.372175: dwc3_ctrl_req: Clear Interface Feature(UNKNOWN) >> irq/90-dwc3-969 [000] d... 54.372186: dwc3_event: event (000010c2): ep0in: Transfer Not Ready (Not Active) [Data Phase] >> UI_Touchscreen-963 [000] d... 54.372437: dwc3_ep_queue: ep1in: req ee268c00 length 0/64 zsI ==> -115 >> UI_Touchscreen-963 [000] d... 54.372451: dwc3_prepare_trb: ep1in: 1/1 trb f0a27000 buf 00000000a9409580 size 64 ctrl 00000811 (Hlcs:sC:normal) >> UI_Touchscreen-963 [000] d... 54.372468: dwc3_gadget_ep_cmd: ep1in: cmd 'Start Transfer' [1030] params 00000000 be844000 00000000 --> status: Successful >> UI_Touchscreen-965 [000] d... 54.393628: dwc3_ep_queue: ep1out: req ee268000 length 0/64 zsI ==> -115 >> UI_Touchscreen-965 [000] d... 54.393646: dwc3_prepare_trb: ep1out: 1/1 trb f0a25000 buf 00000000a94095c0 size 64 ctrl 00000819 (HlcS:sC:normal) >> UI_Touchscreen-965 [000] d... 54.393663: dwc3_gadget_ep_cmd: ep1out: cmd 'Start Transfer' [1030] params 00000000 be843000 00000000 --> status: Successful >> irq/90-dwc3-969 [000] d... 68.205509: dwc3_event: event (00050301): Link Change [RX.Detect] >> irq/90-dwc3-969 [000] d... 68.208516: dwc3_event: event (00030301): Link Change [U3] >> irq/90-dwc3-969 [000] d... 73.922019: dwc3_gadget_ep_disable: ep1in: mps 1024/1024 streams 15 burst 0 ring 1/0 flags E:swBpm:e:< >> irq/90-dwc3-969 [000] d... 73.922879: dwc3_gadget_ep_cmd: ep1in: cmd 'End Transfer' [199944] params 00000000 00000000 00000000 --> status: Timed Out >> irq/90-dwc3-969 [000] d... 74.229721: dwc3_gadget_giveback: ep1in: req ee268c00 length 0/64 zsI ==> -108 >> >> You need to fix something in your gadget, apparently. > I will investigate this route. Perhaps using the in-tree HID gadget will > resolve my issue. Cool. Please, do let me know if you still face issues :-) -- balbi
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