UBI assert failed in wl_tree_add at 168 using v4.9-rc1

[Stefan Agner]

Hi Richard,

On 2016-10-18 13:09, Richard Weinberger wrote:
> Stefan,
> 
> On Tue, Oct 18, 2016 at 9:51 PM, Stefan Agner <stefan at agner.ch> wrote:
>> Hi All,
>>
>> After flashing and 2-3 hard resets (power-cut), I happen to get a lot of
>> the following stack traces:
>>
>> [   33.031951] UBI assert failed in wl_tree_add at 168 (pid 1)
<snip>
>>
>> The system successfully boots in the end (after printing out such traces
>> for a minute or so).
>>
>> This is on a NXP Vybrid using the vf610-nfc driver. The driver is
>> mainline since some releases now, and I haven't seen such a stack trace
>> before.
>>
>> I do use fastmap and a 2015.04 U-Boot to read the kernel/device tree
>> from a separate volume.
>>
>> Anybody else seen this?
> 
> Does this patch help?
> http://lists.infradead.org/pipermail/linux-mtd/2016-October/069702.html
> 
> I'm assuming that the problem first appeared in v4.9-rc1, right?

I've never seen it before, so yes looks like it appeared in v4.9-rc1.

I rebooted and power-cycled a bunch of times with that patch, it looks
stable now! So yes, the patch helps. I will do some more tests and
report in case I see it again.

Thanks!

--
Stefan