[PATCH v3 05/14] ASoC: rockchip: i2s: Fix concurrency between tx/rx

[Mark Brown]

On Thu, Aug 26, 2021 at 12:01:51PM +0800, Sugar Zhang wrote:

> +/* tx/rx ctrl lock */
> +static DEFINE_SPINLOCK(lock);
> +

Why is this a global and not part of the driver data?  It's also not
clear to me why this is a spinlock and not a mutex.
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