diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2014-08-08 19:29:35 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-08-11 23:01:13 +0400 |
| commit | 6912831623c5bbd38c6c26039d5f821557e5f541 (patch) | |
| tree | e3b85d99c34d370673252b22a4800afb0d0bdb07 | |
| parent | ae34a78c430c37c06404f032fb04e51315204281 (diff) | |
| download | linux-6912831623c5bbd38c6c26039d5f821557e5f541.tar.xz | |
ASoC: dapm: Fix uninitialized variable in snd_soc_dapm_get_enum_double()
If soc_dapm_read() fails, reg_val will be uninitialized, and bogus
values will be written later:
sound/soc/soc-dapm.c: In function 'snd_soc_dapm_get_enum_double':
sound/soc/soc-dapm.c:2862:15: warning: 'reg_val' may be used uninitialized in this function [-Wmaybe-uninitialized]
unsigned int reg_val, val;
^
Return early on error to fix this.
Introduced by commit ce0fc93ae56e2ba50ff8c220d69e4e860e889320 ("ASoC:
Add DAPM support at the component level").
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
| -rw-r--r-- | sound/soc/soc-dapm.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 8348352dc2c6..177bd8639ef9 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -2860,12 +2860,14 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol, struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int reg_val, val; - int ret = 0; - if (e->reg != SND_SOC_NOPM) - ret = soc_dapm_read(dapm, e->reg, ®_val); - else + if (e->reg != SND_SOC_NOPM) { + int ret = soc_dapm_read(dapm, e->reg, ®_val); + if (ret) + return ret; + } else { reg_val = dapm_kcontrol_get_value(kcontrol); + } val = (reg_val >> e->shift_l) & e->mask; ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val); @@ -2875,7 +2877,7 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol, ucontrol->value.enumerated.item[1] = val; } - return ret; + return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double); |