>-----Original Message----- >From: Felipe Balbi [mailto:balbi@xxxxxxxxxx] >Sent: Friday, December 14, 2018 4:52 PM >To: Zengtao (B) <prime.zeng@xxxxxxxxxxxxx> >Cc: liangshengjun <liangshengjun@xxxxxxxxxxxxx>; Zengtao (B) ><prime.zeng@xxxxxxxxxxxxx>; Greg Kroah-Hartman ><gregkh@xxxxxxxxxxxxxxxxxxx>; linux-usb@xxxxxxxxxxxxxxx; >linux-kernel@xxxxxxxxxxxxxxx >Subject: Re: [PATCH] usb: dwc3: gadget: fix miss isoc issue introduced by >IRQ latency > >* PGP Signed by an unknown key > >Zeng Tao <prime.zeng@xxxxxxxxxxxxx> writes: > >> If it's a busy system, some times when we start an isoc transfer, the >> framenumber get from the event buffer may be already elasped, in this >> case, we will get all the packets dropped due to miss isoc. And we >> turn into transfer nothing, to fix this issue, we need to fix the >> framenumber to make sure that it's not out of date. >> >> Signed-off-by: Liang Shengjun <liangshengjun@xxxxxxxxxxxxx> >> Signed-off-by: Zeng Tao <prime.zeng@xxxxxxxxxxxxx> > >There's a patch going upstream already doing this: > >https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git/commit/?h >=next&id=d53701067f048b8b11635e964b6d3bd9a248c622 > Sorry, I think I missed to update to the latest version. But I think my patch is more efficient. Because I just sync the frame from the HW, it won't fail and there is no need to extra tries. What do you think about it? Regards Zengtao >-- >balbi > >* Unknown Key >* 0xE11A9906
