[PATCH 1/3] ASoC: Intel: atom: Take the drv->lock mutex before calling sst_send_slot_map()

[Pierre-Louis Bossart]

On 4/2/20 1:53 PM, Hans de Goede wrote:
> sst_send_slot_map() uses sst_fill_and_send_cmd_unlocked() because in some
> places it is called with the drv->lock mutex already held.
> 
> So it must always be called with the mutex locked. This commit adds missing
> locking in the sst_set_be_modules() code-path.
> 
> Fixes: 24c8d14192cc ("ASoC: Intel: mrfld: add DSP core controls")
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>

2014 bug, nice!

for the series:

Acked-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>

> ---
>   sound/soc/intel/atom/sst-atom-controls.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/sound/soc/intel/atom/sst-atom-controls.c b/sound/soc/intel/atom/sst-atom-controls.c
> index baef461a99f1..2c3798034b1d 100644
> --- a/sound/soc/intel/atom/sst-atom-controls.c
> +++ b/sound/soc/intel/atom/sst-atom-controls.c
> @@ -966,7 +966,9 @@ static int sst_set_be_modules(struct snd_soc_dapm_widget *w,
>   	dev_dbg(c->dev, "Enter: widget=%s\n", w->name);
>   
>   	if (SND_SOC_DAPM_EVENT_ON(event)) {
> +		mutex_lock(&drv->lock);
>   		ret = sst_send_slot_map(drv);
> +		mutex_unlock(&drv->lock);
>   		if (ret)
>   			return ret;
>   		ret = sst_send_pipe_module_params(w, k);
>