Hi, On Wed, May 04, 2016 at 03:44:41PM +0200, Marcin Niestroj wrote: > Hi, > > On 03.05.2016 15:37, Bin Liu wrote: > >Hi, > > > >On Tue, May 03, 2016 at 03:19:10PM +0200, Yegor Yefremov wrote: > >>On Tue, May 3, 2016 at 3:16 PM, Bin Liu <b-liu@xxxxxx> wrote: > >>>Hi, > >>> > >>>On Tue, May 03, 2016 at 11:03:23AM +0200, Yegor Yefremov wrote: > >>>>On Thu, Apr 14, 2016 at 6:50 PM, Bin Liu <b-liu@xxxxxx> wrote: > >>>>>Hi, > >>>>> > >>>>>On Thu, Apr 07, 2016 at 09:09:50AM +0200, Yegor Yefremov wrote: > >>>>>>>>Could you then look at the freeze issue with removing FTDI device > >>>>>>>>during it is working? > >>>>>>> > >>>>>>>I can. I will have to first locate a FT4243H device. > >>>>>> > >>>>>>Insert MA260 and execute following command: > >>>>>> > >>>>>>cat /dev/zero > /dev/ttyUSB2 > >>>>>> > >>>>>>then remove MA260 - system freezes. > >>>>> > >>>>>Can you please try the patch [1] to see if it fixes the system freezing > >>>>>issue? > >>>>> > >>>>>[1] http://marc.info/?l=linux-usb&m=144683124825113&w=2 > >>>> > >>>>I've tested this patch with both FTDI FT4232HS as also Huawei > >>>>ME909u-521. I can produce a freeze with both devices. > >>> > >>>Please remind me, is the dongle directly connected to MUSB or behind a > >>>hub? > >> > >>Behind a hub. > >> > >>Btw your other patch "musb_host: fix lockup on rxcsr_h_error" is working. > > > >Thanks for the update. > > > >Can you please test the patch [1] instead? I'd like to use it as the > >fix. > > We are running a system on ChiliBoard (am335x) and we have also noticed > freezes caused by usb driver. After applying this patch, we are not able > to reproduce the issue anymore. Thanks for the report. > > Our setup: We have Telit LE910 modem connected to USB hub, which is > connected to am335x. We use AT commands (usb option driver) to control > modem. Freezing happens when we poweroff the modem (issue poweroff to > modem, not simply remove the power). Before freeze, we have active > connection to some modem's virtual serial ports (GPS, modem connection). It seems to be the same problem which the patch fixes. > > We also noticed, that when we remove 5V power from the board, system >From which board? the ChiliBoard or Telit? > unfreezes and works ok from that time. In our case 5V is used to power > Telit modem. > > > > >Regards, > >-Bin. > > > >[1] http://marc.info/?l=linux-usb&m=146222355213935&w=2 > > > >-- > >To unsubscribe from this list: send the line "unsubscribe linux-omap" in > >the body of a message to majordomo@xxxxxxxxxxxxxxx > >More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > Regards, > Marcin Regards, -Bin. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
