Hi Stefan, > Hi Minas, > > Am 09.04.19 um 08:54 schrieb Jisheng Zhang: >> On Mon, 8 Apr 2019 16:05:51 +0800 Jisheng Zhang wrote: >> >>> Hi Stefan, >>> >>> On Mon, 8 Apr 2019 09:57:14 +0200 Stefan Wahren wrote: >>> >>>> >>>> Hi Jisheng, >>>> >>>> >>>> thanks for sending this patch. I already reported this issue >>>> last year [1], but Microchip wasn't able to provide a fix. >>>> >>>> I will give it a try. >>>> >>>>> The second one: 8000 usb interrupts per second when idle. >>>>> This is abnormal. any idea? Is it due to the lan78xx? >>>> Does this downstream patch [2] improve your situation? >>> Thanks a lot. Will try the patch tonight. >> I tried this patch, it doesn't help. One more observation: if I >> ifconfig eth0 down, I can still get 8000 usb interrupts per second. >> Not sure whether this is usb issue or not. > > Jisheng reports a lot of USB interrupts while the lan78xx driver on > Raspberry Pi 3B+ is in idle. > > Any suggestions to narrow this down? dwc2 in host mode enable SOF interrupts if any periodic EP are in use. So, 8000 interrupts per second is expectant behavior. > > Stefan > >> >> Thanks >>
