[alsa-devel] [PATCH v3] ASoC: AMD: Fix race condition between register access

[Agrawal, Akshu]

On 11/5/2018 4:45 PM, Mark Brown wrote:
> On Wed, Oct 31, 2018 at 09:24:10PM +0000, Agrawal, Akshu wrote:
> 
>> +/* Lock to protect access to registers */
>> +static DEFINE_SPINLOCK(lock);
>> +
> 
> Why is this a global variable and not a part of the driver structure?
> Is there some interaction between multiple instances?
>
Yes, this lock is used to protect registers which are common to multiple
instances and can cause issue in cases such as simultaneous playback and
capture.

Thanks,
Akshu