On Fri, May 22, 2015 at 03:50:47PM +0800, Lu, Baolu wrote: > > > On 05/22/2015 02:46 PM, Lu, Baolu wrote: > > > > > >On 05/22/2015 11:11 AM, David Cohen wrote: > >>On Thu, May 21, 2015 at 08:09:54PM -0700, David Cohen wrote: > >>>Hi, > >>> > >>>On Fri, May 22, 2015 at 10:07:05AM +0800, Lu Baolu wrote: > >>>>Many drivers and modules depend on ULPI bus registeration to > >>>>register ULPI interfaces and drivers. It's more appropriate > >>>>to register ULPI bus in subsys_initcall instead of module_init. > >>>> > >>>>Kernel panic has been reported with some kind of kernel config. > >>>Even though I agree subsys_initcall is better to register ulpi bus, > >>>it's > >>>still no excuse to have kernel panic. What about ULPI bus being > >>>compiled > >>>as module? > > > >No kernel panic if ULPI is built as a module. > > > >>>IMHO this is avoiding the proper kernel panic fix which should be > >>>failing gracefully (or defer probe) from tusb1210 driver. > >>Maybe I need to express myself better :) > >>IMHO we should not consider work done with this patch only. It's still > >>incomplete. > > > >I am with you on that we should know the real problem. > > > >I could go ahead with further debugging. Do you have any suggestions > >about which direction should I go? > > I forgot to mention that the panic was found in an Android environment. > The kernel version is v4.1-rc3. FWIW: The problem with Android environment is the amount of off-tree patches you may have over there. For upstream tasks, I'd suggest use a clean tree + patches you want to test. Usually yocto looks more friendly to test under this environment. Br, David > > > > >> > >>Br, David > > > >Thank you, > >-Baolu > > > >>-- > >>To unsubscribe from this list: send the line "unsubscribe linux-kernel" > >>in > >>the body of a message to majordomo@xxxxxxxxxxxxxxx > >>More majordomo info at http://vger.kernel.org/majordomo-info.html > >>Please read the FAQ at http://www.tux.org/lkml/ > >> > >> > > > >-- > >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > >the body of a message to majordomo@xxxxxxxxxxxxxxx > >More majordomo info at http://vger.kernel.org/majordomo-info.html > >Please read the FAQ at http://www.tux.org/lkml/ > > > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
