From 58f01c7fc81baced84f237554d56847e17b5d730 Mon Sep 17 00:00:00 2001 From: Tom Rix Date: Fri, 30 Apr 2021 07:21:17 -0700 Subject: [PATCH] ASoC: codecs: lpass-wsa-macro: handle unexpected input 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 Reviewed-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20210430142117.3272772-1-trix@redhat.com Signed-off-by: Mark Brown --- sound/soc/codecs/lpass-wsa-macro.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c index 1a7fa5492f28..d3ac318fd6b6 100644 --- a/sound/soc/codecs/lpass-wsa-macro.c +++ b/sound/soc/codecs/lpass-wsa-macro.c @@ -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]) { -- 2.11.0