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ASoC: wm_adsp: Add power lock for firmware change control 

We should hold the DSP power lock whilst changing the firmware since we
need to check if it is running first.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax 2015-12-08 16:08:28 +00:00 committed by Mark Brown
parent 078e71838c
commit d27c5e155c
1 changed files with 8 additions and 3 deletions
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11
sound/soc/codecs/wm_adsp.c
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@ -451,6 +451,7 @@ static int wm_adsp_fw_put(struct snd_kcontrol *kcontrol,
struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
struct wm_adsp *dsp = snd_soc_codec_get_drvdata(codec);
int ret = 0;
if (ucontrol->value.integer.value[0] == dsp[e->shift_l].fw)
return 0;
@ -458,12 +459,16 @@ static int wm_adsp_fw_put(struct snd_kcontrol *kcontrol,
if (ucontrol->value.integer.value[0] >= WM_ADSP_NUM_FW)
return -EINVAL;
mutex_lock(&dsp[e->shift_l].pwr_lock);
if (dsp[e->shift_l].running)
return -EBUSY;
ret = -EBUSY;
else
dsp[e->shift_l].fw = ucontrol->value.integer.value[0];
dsp[e->shift_l].fw = ucontrol->value.integer.value[0];
mutex_unlock(&dsp[e->shift_l].pwr_lock);
return 0;
return ret;
}
static const struct soc_enum wm_adsp_fw_enum[] = {