Re: [PATCH 2/4] ASoC: SDCA: enable pm_runtime before taking the initial reference

[Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>]

On 10/19/26 9:39 AM, Charles Keepax wrote:
> On Sun, Oct 18, 2026 at 08:23:57PM +0100, Srinivas Kandagatla wrote:
>> If devm_pm_runtime_enable() failed, the usage count taken earlier by
>> pm_runtime_get_noresume() was never dropped. Reorder so the get only
>> happens once enable has succeeded.
>>
>> Fixes: 2d877d0659cb ("ASoC: SDCA: Add basic SDCA class driver")
>> Cc: stable@vger.kernel.org
>> Assisted-by: LLM
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
>> ---
>>  sound/soc/sdca/sdca_class.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/sound/soc/sdca/sdca_class.c b/sound/soc/sdca/sdca_class.c
>> index bcc660aeb739..3361db188046 100644
>> --- a/sound/soc/sdca/sdca_class.c
>> +++ b/sound/soc/sdca/sdca_class.c
>> @@ -194,12 +194,13 @@ int sdca_class_probe(struct sdw_slave *sdw,
>>  	pm_runtime_set_autosuspend_delay(dev, 250);
>>  	pm_runtime_use_autosuspend(dev);
>>  	pm_runtime_set_active(dev);
>> -	pm_runtime_get_noresume(dev);
>>  
>>  	ret = devm_pm_runtime_enable(dev);
>>  	if (ret)
>>  		return ret;
>>  
>> +	pm_runtime_get_noresume(dev);
> 
> I think it would be better to drop the reference on the error
> path. Doing it this way round there is a very small chance that
> the device auto-suspends between the enable and get_noresume.
> The intention was to keep everything powered on until bring up
> was complete.
Understood, will fix that in v2.

--srini
> 
> Thanks,
> Charles