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ASoC: codecs: lpass-wsa-macro: handle unexpected input

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Static analysis reports this problem

lpass-wsa-macro.c:1732:6: warning: Array subscript is undefined
        if (wsa->ec_hq[ec_tx]) {
            ^~~~~~~~~~~~~~~~~

The happens because 'ec_tx' is never initialized and there is
no default in switch statement that sets ec_tx.  Add a default
case that returns an error before the array is accessed.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210430142117.3272772-1-trix@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Tom Rix 2021-04-30 07:21:17 -07:00 committed by Mark Brown
parent 1d122dd3b1
commit 58f01c7fc8
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 0 deletions
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4
sound/soc/codecs/lpass-wsa-macro.c
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@ -1727,6 +1727,10 @@ static int wsa_macro_enable_echo(struct snd_soc_dapm_widget *w,
val = val & CDC_WSA_RX_MIX_TX1_SEL_MASK;
ec_tx = (val >> CDC_WSA_RX_MIX_TX1_SEL_SHFT) - 1;
break;
default:
dev_err(component->dev, "%s: Invalid shift %u\n",
__func__, w->shift);
return -EINVAL;
}
if (wsa->ec_hq[ec_tx]) {