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ASoC: tlv320aic32x4: Kernel OOPS while entering DAPM standby mode

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During the bootup of the kernel, the DAPM bias level is in the OFF
state. As soon as the DAPM framework kicks in it pushes the codec
into STANDBY state.

The probe function doesn't prepare the clock, and STANDBY state
does a clk_disable_unprepare() without checking the previous state.
This leads to an OOPS.

Not transitioning from an OFF state to the STANDBY state fixes the
problem.

Signed-off-by: b-ak <anur.bhargav@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
This commit is contained in:
b-ak 2019-01-07 22:30:22 +05:30 • committed by Mark Brown
parent 6175471755
commit 667e9334fa
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1 changed files with 4 additions and 0 deletions
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4
sound/soc/codecs/tlv320aic32x4.c
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@ -822,6 +822,10 @@ static int aic32x4_set_bias_level(struct snd_soc_component *component,
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
/* Initial cold start */
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
break;
/* Switch off BCLK_N Divider */
snd_soc_component_update_bits(component, AIC32X4_BCLKN,
AIC32X4_BCLKEN, 0);