[alsa-devel] BUG since "ASoC: simple-card: Add pm callbacks to platform driver"

[Peter Ujfalusi]

On 05/17/16 14:02, Geert Uytterhoeven wrote:
> On Tue, May 17, 2016 at 12:55 PM, Geert Uytterhoeven
> <geert at linux-m68k.org> wrote:
>> With today's sound-asoc/for-next, I'm seeing on r8a7791/koelsch and
>> sh73a0/kzm9g:
>>
>>     kernel BUG at drivers/base/regmap/regcache.c:347!
>>     Internal error: Oops - BUG: 0 [#1] SMP ARM
>>     Modules linked in:
>>     CPU: 0 PID: 20 Comm: kworker/0:1 Not tainted
>> 4.6.0-koelsch-07135-g1481dd77fa7d01cb #2621
>>     Hardware name: Generic R8A7791 (Flattened Device Tree)
>>     Workqueue: events soc_resume_deferred
>>     task: ef512100 ti: ef5a6000 task.ti: ef5a6000
>>     PC is at regcache_sync+0xc/0x118
>>     LR is at ak4642_resume+0x20/0x28
> 
> This is during resume from s2ram.

if you revert the patch does the ak4642_resume() is called at all, I think not.
But in the driver does not implement the .suspend callback, probably this
never worked correctly in ak4642?

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