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ASoC: tegra+wm8903: turn of mic detect when card is removed 

If mic detect is left enabled and the WM8903 detects a status change,
the WM8903 driver will make a callback against the free()d jack, which
will cause a crash.

This problem can be triggered by fully initializing an audio card, then
removing and re-inserting the machine driver module.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Stephen Warren 2012-06-11 11:27:19 -06:00 committed by Mark Brown
parent 9c699e0a95
commit 3419ae781f
1 changed files with 13 additions and 0 deletions
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13
sound/soc/tegra/tegra_wm8903.c
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@ -346,6 +346,17 @@ static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
return 0;
}
static int tegra_wm8903_remove(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = codec_dai->codec;
wm8903_mic_detect(codec, NULL, 0, 0);
return 0;
}
static struct snd_soc_dai_link tegra_wm8903_dai = {
.name = "WM8903",
.stream_name = "WM8903 PCM",
@ -363,6 +374,8 @@ static struct snd_soc_card snd_soc_tegra_wm8903 = {
.dai_link = &tegra_wm8903_dai,
.num_links = 1,
.remove = tegra_wm8903_remove,
.controls = tegra_wm8903_controls,
.num_controls = ARRAY_SIZE(tegra_wm8903_controls),
.dapm_widgets = tegra_wm8903_dapm_widgets,