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authorLiam Girdwood <lrg@ti.com>2012-03-06 18:16:19 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-03-06 20:07:03 +0000
commit96acc357bedad69fbc94d1b923a960af5a411c6f (patch)
treecc0666ba1048b8925d3468d727835742a1ce8097 /sound/soc/soc-dapm.c
parentcc22d37e7f5e1745658760660f03793913f43e49 (diff)
downloadlinux-96acc357bedad69fbc94d1b923a960af5a411c6f.tar.bz2
ASoC: DAPM: Make sure DAPM widget IO ops hold the component mutex
Currently not all DAPM widget IO ops are holding their component mutex (codec or platform). Make sure this is now held for DAPM widget IO operations. Signed-off-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/soc-dapm.c')
-rw-r--r--sound/soc/soc-dapm.c34
1 files changed, 28 insertions, 6 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index dcd11609f930..a837977f0ac7 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -206,7 +206,23 @@ static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
return -1;
}
-static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
+static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
+{
+ if (w->codec)
+ mutex_lock(&w->codec->mutex);
+ else if (w->platform)
+ mutex_lock(&w->platform->mutex);
+}
+
+static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
+{
+ if (w->codec)
+ mutex_unlock(&w->codec->mutex);
+ else if (w->platform)
+ mutex_unlock(&w->platform->mutex);
+}
+
+static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
unsigned short reg, unsigned int mask, unsigned int value)
{
bool change;
@@ -219,18 +235,24 @@ static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
if (ret != 0)
return ret;
} else {
+ soc_widget_lock(w);
ret = soc_widget_read(w, reg);
- if (ret < 0)
+ if (ret < 0) {
+ soc_widget_unlock(w);
return ret;
+ }
old = ret;
new = (old & ~mask) | (value & mask);
change = old != new;
if (change) {
ret = soc_widget_write(w, reg, new);
- if (ret < 0)
+ if (ret < 0) {
+ soc_widget_unlock(w);
return ret;
+ }
}
+ soc_widget_unlock(w);
}
return change;
@@ -847,7 +869,7 @@ int dapm_reg_event(struct snd_soc_dapm_widget *w,
else
val = w->off_val;
- soc_widget_update_bits(w, -(w->reg + 1),
+ soc_widget_update_bits_locked(w, -(w->reg + 1),
w->mask << w->shift, val << w->shift);
return 0;
@@ -1105,7 +1127,7 @@ static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
"pop test : Applying 0x%x/0x%x to %x in %dms\n",
value, mask, reg, card->pop_time);
pop_wait(card->pop_time);
- soc_widget_update_bits(w, reg, mask, value);
+ soc_widget_update_bits_locked(w, reg, mask, value);
}
list_for_each_entry(w, pending, power_list) {
@@ -1235,7 +1257,7 @@ static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
w->name, ret);
}
- ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
+ ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
update->val);
if (ret < 0)
pr_err("%s DAPM update failed: %d\n", w->name, ret);