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@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/wm_adsp.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 2ab9de8..b083642 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -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[] = {
--
2.1.4
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