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? Regards, -Bin. -- 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
