Hi there Minas / linux-usb ; I have a good ole APC Back-UPS ES 600N that from time to time resolves that it should stop talking to my SBCs. This issue happened in my Raspberry Pi, and when it stopped I had the following printk: Apr 11 14:10:15 localhost kernel: [9416331.806123] hid-generic 0003:051D:0002.000A: usb_submit_urb(ctrl) failed: -1 All I had to do is monitor the graphics and when it flatlined, unplug and plug the UPS usb port. Until the next occurrence. Well, I lived with it for some good years. Last weekend I changed the Raspberry Pi with a TinkerBoard. And the cranky UPS is also tickling TinkerBoard's USB port. Now the issue manifests in a slightly different way: == DEVICE ENUMERATION == [56529.462106] usb 1-1.1.3: new low-speed USB device number 9 using dwc2 [56530.222538] usb 1-1.1.3: New USB device found, idVendor=051d, idProduct=0002 [56530.222638] usb 1-1.1.3: New USB device strings: Mfr=3, Product=1, SerialNumber=2 [56530.222697] usb 1-1.1.3: Product: Back-UPS ES 600N FW:876.Q1j.D USB FW:Q1j [56530.222772] usb 1-1.1.3: Manufacturer: APC [56530.222821] usb 1-1.1.3: SerialNumber: 5B1017T20483 [56535.075030] hid-generic 0003:051D:0002.0003: hiddev0,hidraw1: USB HID v1.10 Device [APC Back-UPS ES 600N FW:876.Q1j.D USB FW:Q1j] on usb-ff540000.usb-1.1.3/input0 == KERNEL WHINES == [105243.156331] dwc2 ff540000.usb: dwc2_hc_chhltd_intr_dma: Channel 11 - ChHltd set, but reason is unknown [105243.156414] dwc2 ff540000.usb: hcint 0x00000002, intsts 0x06600029 [105273.536188] dwc2 ff540000.usb: dwc2_hc_chhltd_intr_dma: Channel 13 - ChHltd set, but reason is unknown [105273.536268] dwc2 ff540000.usb: hcint 0x00000002, intsts 0x06600029 Well, in spirit to getting things going nicely in the new system, I have found the thread: https://www.spinics.net/lists/linux-usb/msg161854.html Where Minas suggests a patch to tackle it. I tried to backport the patch to my 4.4 Kernel and it was not really happy about it: == COMPILE BARFS == CC drivers/usb/dwc2/hcd.o drivers/usb/dwc2/hcd.c: In function ‘dwc2_core_init’: drivers/usb/dwc2/hcd.c:2191:22: error: ‘trdtrim’ undeclared (first use in this function); did you mean ‘strstrip’? u32 usbcfg, otgctl; trdtrim; ^~~~~~~ strstrip drivers/usb/dwc2/hcd.c:2191:22: note: each undeclared identifier is reported only once for each function it appears in drivers/usb/dwc2/hcd.c:2192:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] error, forbidden warning: hcd.c:2192 scripts/Makefile.build:277: recipe for target 'drivers/usb/dwc2/hcd.o' failed make[3]: *** [drivers/usb/dwc2/hcd.o] Error 1 scripts/Makefile.build:484: recipe for target 'drivers/usb/dwc2' failed make[2]: *** [drivers/usb/dwc2] Error 2 scripts/Makefile.build:484: recipe for target 'drivers/usb' failed make[1]: *** [drivers/usb] Error 2 Makefile:1016: recipe for target 'drivers' failed make: *** [drivers] Error 2 <grins> Patchset: https://pastebin.com/v1ink6fJ == QUESTIONS == 1. What are the odds that the OP patchset will also help my issue? 2. IF 1 == true ; then what am I doing wrong in my patch? :-) Appreciate your time. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
