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Commit 4b80b8c2 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Mark Brown
Browse files

ASoC: snd_soc_new_{mixer,mux,pga} make sure to use right DAPM context 



Currently it is possible that snd_soc_new_{mixer,mux,pga} is called with a
DAPM context not matching the widgets context. This can lead to a wrong
prefix_len calculation, which will result in undefined behaviour. To avoid
this always use the DAPM context from the widget itself.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Acked-by: default avatarLiam Girdwood <lrg@ti.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
parent 0cd114ff

sound/soc/soc-dapm.c

+8 −9
Original line number Diff line number Diff line
@@ -350,9 +350,9 @@ static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm, 
}



/* create new dapm mixer control */

static int dapm_new_mixer(struct snd_soc_dapm_context *dapm,

	struct snd_soc_dapm_widget *w)

static int dapm_new_mixer(struct snd_soc_dapm_widget *w)

{

	struct snd_soc_dapm_context *dapm = w->dapm;

	int i, ret = 0;

	size_t name_len, prefix_len;

	struct snd_soc_dapm_path *path;
@@ -450,9 +450,9 @@ static int dapm_new_mixer(struct snd_soc_dapm_context *dapm, 
}



/* create new dapm mux control */

static int dapm_new_mux(struct snd_soc_dapm_context *dapm,

	struct snd_soc_dapm_widget *w)

static int dapm_new_mux(struct snd_soc_dapm_widget *w)

{

	struct snd_soc_dapm_context *dapm = w->dapm;

	struct snd_soc_dapm_path *path = NULL;

	struct snd_kcontrol *kcontrol;

	struct snd_card *card = dapm->card->snd_card;
@@ -535,8 +535,7 @@ static int dapm_new_mux(struct snd_soc_dapm_context *dapm, 
}



/* create new dapm volume control */

static int dapm_new_pga(struct snd_soc_dapm_context *dapm,

	struct snd_soc_dapm_widget *w)

static int dapm_new_pga(struct snd_soc_dapm_widget *w)

{

	if (w->num_kcontrols)

		dev_err(w->dapm->dev,
@@ -1826,13 +1825,13 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm) 
		case snd_soc_dapm_mixer:

		case snd_soc_dapm_mixer_named_ctl:

			w->power_check = dapm_generic_check_power;

			dapm_new_mixer(dapm, w);

			dapm_new_mixer(w);

			break;

		case snd_soc_dapm_mux:

		case snd_soc_dapm_virt_mux:

		case snd_soc_dapm_value_mux:

			w->power_check = dapm_generic_check_power;

			dapm_new_mux(dapm, w);

			dapm_new_mux(w);

			break;

		case snd_soc_dapm_adc:

		case snd_soc_dapm_aif_out:
@@ -1845,7 +1844,7 @@ int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm) 
		case snd_soc_dapm_pga:

		case snd_soc_dapm_out_drv:

			w->power_check = dapm_generic_check_power;

			dapm_new_pga(dapm, w);

			dapm_new_pga(w);

			break;

		case snd_soc_dapm_input:

		case snd_soc_dapm_output: