2016-05-23 16:36 GMT+03:00 Bin Liu <b-liu@xxxxxx>: > Hi, > > On Sat, May 21, 2016 at 10:04:48PM +0300, Matwey V. Kornilov wrote: >> 2016-05-21 20:50 GMT+03:00 Matwey V. Kornilov <matwey@xxxxxxxxxx>: >> > 2016-05-21 6:13 GMT+03:00 Bin Liu <binmlist@xxxxxxxxx>: >> >> Hi, >> >> >> >> On Fri, May 20, 2016 at 4:20 PM, Matwey V. Kornilov <matwey@xxxxxxxxxx> wrote: >> >>> 2016-05-21 0:12 GMT+03:00 Bin Liu <b-liu@xxxxxx>: >> >>>> Hi, >> >>>> >> >>>> On Sat, May 21, 2016 at 12:05:06AM +0300, Matwey V. Kornilov wrote: >> >>>>> By the way, is it ok that function musb_rx_dma_iso_cppi41 uses >> >>>>> hw_ep->tx_channel? I would suppose that it should use rx_channel >> >>>>> instead. >> >>>> >> >>>> I just got here, and am wondering the same. But the question is why just >> >>>> your case hit the problem. I will try to look at it more next week. >> >>>> >> >>>> I had an impression the linux-usb@ has a discussion before about >> >>>> rx/tx-channel messing up, will have to look it up. >> >>>> >> >>> >> >>> Thank you. >> >>> If you need additional info, I can use kgdb with this issue. >> >> >> >> After reviewed the code, it must be hw_ep->rx_channel instead. It is likely a >> >> bug caused by commit 069a3fd (usb: musb: Remove ifdefs for musb_host_rx >> >> in musb_host.c part1). Please test with the following patch. >> >> >> > >> > I've just tested this patch. Indeed, it helps to avoid kernel panic. >> > Now, I can interact with my webcam and watch video-stream in xawtv. >> > It would be great if the patch could become a part of 4.6.x stable tree. >> > >> >> Hm, the following string appeared one time during my testing: >> >> [ 867.017179] musb_host_rx 1925: RX14 dma busy, csr 2020 > > This seems to be a different issue. Does your webcam still functional > after the log shows up? It seems so, but I am not sure completely, unfortunately this message has stochastic origin. So, I will try to reproduce it again and then report additional info. > > Regards, > -Bin. > -- With best regards, Matwey V. Kornilov. Sternberg Astronomical Institute, Lomonosov Moscow State University, Russia 119991, Moscow, Universitetsky pr-k 13, +7 (495) 9392382 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
