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| author | Eero Nurkkala <ext-eero.nurkkala@nokia.com> | 2009-10-30 12:34:02 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-10-30 18:49:12 +0100 |
| commit | 8538a119bfb9031c402a33fc65c276ab9bfafdd5 (patch) | |
| tree | 8d782ea40c68a433b318ad01aaea0448423dc7b5 /sound | |
| parent | Merge branch 'for-2.6.32' into for-2.6.33 (diff) | |
| download | linux-8538a119bfb9031c402a33fc65c276ab9bfafdd5.tar.xz linux-8538a119bfb9031c402a33fc65c276ab9bfafdd5.zip | |
ASoC: remove io_mutex
Remove the io_mutex. It has a drawback of serializing
all accesses to snd_soc_update_bits() even when multiple
codecs are in use. In addition, it fails to actually do
its task - during snd_soc_update_bits(), dapm_update_bits()
may also be accessing the same register which may result in
an outdated register value.
Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/soc-core.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 2d190df9fccc..025c5a7f8b72 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -37,7 +37,6 @@ #include <sound/initval.h> static DEFINE_MUTEX(pcm_mutex); -static DEFINE_MUTEX(io_mutex); static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq); #ifdef CONFIG_DEBUG_FS @@ -1346,14 +1345,12 @@ int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg, int change; unsigned int old, new; - mutex_lock(&io_mutex); old = snd_soc_read(codec, reg); new = (old & ~mask) | value; change = old != new; if (change) snd_soc_write(codec, reg, new); - mutex_unlock(&io_mutex); return change; } EXPORT_SYMBOL_GPL(snd_soc_update_bits); @@ -1376,11 +1373,9 @@ int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg, int change; unsigned int old, new; - mutex_lock(&io_mutex); old = snd_soc_read(codec, reg); new = (old & ~mask) | value; change = old != new; - mutex_unlock(&io_mutex); return change; } |