On Tue, Apr 4, 2017 at 12:38 AM, Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> wrote: > > Hi, > > Minas Harutyunyan <Minas.Harutyunyan@xxxxxxxxxxxx> writes: >>>>>>> We've noticed that when using usb ethernet adapters on HiKey, we >>>>>>> occasionally see errors like: >>>>>>> >>>>>>> dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 0 - ChHltd set, >>>>>>> but reason is unknown >>>>>>> dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x06200029 >>>>>>> >>>>>>> dwc2 f72c0000.usb: dwc2_hc_chhltd_intr_dma: Channel 11 - ChHltd set, >>>>>>> but reason is unknown >>>>>>> dwc2 f72c0000.usb: hcint 0x00000002, intsts 0x04200029 >>>>>>> >>>>>>> Sometimes followed up by a usb error in the driver, something like: >>>>>>> asix 1-1.2:1.0 eth0: asix_rx_fixup() Bad Header Length 0x36000807, offset 68 >>>>>>> >>>>>>> Curious if you've seen any reports like this? >>>> >>>> The core version is less than 2.71a, am I right? >>> >>> So it looks like its reporting 0x4f54300a for hsotg->regs + GSNPSID >>> which looks like DWC2_CORE_REV_3_00a >>> >>>> Please send full debug log to do more investigation. >>> >>> Full dmesg, or is there special debugging you want me to enable? >> >> Full dmesg around issue. >>> >>>> Also send us regdump after connecting ethernet adapter. >>> >>> Sorry, can you clarify how to generate this? >> >> cat regdump. To locate dwc2 regdump file: cd /; find -name regdump > > this won't work if his distro doesn't mount debugfs. Please give > complete instructions ;-) > > # mkdir -p /d > # mount -t debugfs none /d > # cd /d > # find . -name regdump > > The directory name is the same name as the dwc2 device name, AFAICT. So, > check your DTS for the name of the device. Thanks for the extra details! I didn't have DEBUG_FS built in, so this helped clue me in. Attached are dmesg including the issue and the regdump. I did notice when cating the regdump file, I saw: dwc2 f72c0000.usb: Mode Mismatch Interrupt: currently in Host mode twice. (You'll see it 4 times in the dmesg around 1077 as I cat'ed regdump again to verify it wasn't just chance). Let me know if there is anything else you need! thanks -john
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hikey-usb.regdump
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