Re: [Umap2][4/11][0557:2002] NULL pointer dereference

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On Thu, 2016-08-18 at 15:41 +0300, Binyamin Sharet wrote:
> On 08/18/2016 12:12 PM, Oliver Neukum wrote:
> > On Thu, 2016-08-18 at 12:10 +0300, Binyamin Sharet wrote:
> >> On 08/18/2016 12:02 PM, Oliver Neukum wrote:
> >>> On Thu, 2016-08-18 at 12:03 +0300, Binyamin Sharet wrote:
> >>>> On 08/18/2016 11:37 AM, Oliver Neukum wrote:
> >>>>> On Wed, 2016-08-17 at 17:33 +0300, Binyamin Sharet wrote:
> >>>>>> On 08/17/2016 05:19 PM, Oliver Neukum wrote:
> >>>>>>> On Wed, 2016-08-17 at 17:07 +0300, Binyamin Sharet wrote:
> >>>>>>>> Downloading firmware...
> >>>>>>>> Firmware loaded. I'll be back...
> >>>>>>>> probe of 1-1.1:1.0 failed with error -5
> >>>>>>>>
> >>>>>>>> after that there's USB disconnection, and the machine keeps working as
> >>>>>>>> before.
> >>>>>>>>
> >>>>>>>> If you have any suggestion on how to perform it better, I'd be very
> >>>>>>>> glad
> >>>>>>>> to hear.
> >>>>>>> The kaweth driver was loaded and performed as it should.
> >>>>>>> Whence did you get your kernel sources?
> >>>>> [..]
> >>>>>> git checkout v4.8-rc2
> >>>>>>
> >>>>>> .config was taken from the default ubuntu installation (w/ kernel
> >>>>>> v4.4.0-31-generic)
> >>>>> Hi,
> >>>>>
> >>>>> I think I understand the issue. The oops happens if the firmware is
> >>>>> requested unsuccessfully (missing, IO error, ...). It seems like your
> >>>>> new test system has the firmware. Could you remove the firmwares
> >>>>> "kaweth/*.bin" and retest?
> >>>>>
> >>>>> 	Regards
> >>>>> 		Oliver
> >>>>>
> >>>>>
> >>>> That's a good point!
> >>>>
> >>>> When there's no firmware we still get "unable to handle kernel paging
> >>>> request at ..."
> >>>>
> >>>> So this issue still exist on 4.8-rc2 as well...
> >>> Good!
> >>>
> >>> The attached patches should fix it.
> >>>
> >>> 	Regards
> >>> 		Oliver
> >>>
> >>>
> >> oops.. adding linux-usb again...
> >>
> >> Just to make sure - which kernel version should I patch with those?
> > 4.8-rc2 if possible
> >
> > 	HTH
> > 		Oliver
> >
> >
> patches seem to fix it (applied both together).
> 
> dmesg log:
> 
> ...
> Downloading firmware...
> Direct firmware load for kaweth/new_code.bin failed with error -2
> Firmware request failed
> Error downloading firmware (-2)
> probe of 1-1.1:1.0 failed with error -5
> ...

Thanks. That confirms the fix is good.

	Regards
		Oliver




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