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From: trix@redhat.com
To: srinivas.kandagatla@linaro.org, bgoswami@codeaurora.org,
	lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
	tiwai@suse.com
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	Tom Rix <trix@redhat.com>
Subject: [PATCH v2] ASoC: codecs: lpass-wsa-macro: handle unexpected input
Date: Fri, 30 Apr 2021 07:21:17 -0700	[thread overview]
Message-ID: <20210430142117.3272772-1-trix@redhat.com> (raw)

From: Tom Rix <trix@redhat.com>

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>
---
v2:
  - handle the input error, keep switch
---
 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]) {
-- 
2.26.3


WARNING: multiple messages have this Message-ID (diff)
From: trix@redhat.com
To: srinivas.kandagatla@linaro.org, bgoswami@codeaurora.org,
	lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
	tiwai@suse.com
Cc: Tom Rix <trix@redhat.com>,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2] ASoC: codecs: lpass-wsa-macro: handle unexpected input
Date: Fri, 30 Apr 2021 07:21:17 -0700	[thread overview]
Message-ID: <20210430142117.3272772-1-trix@redhat.com> (raw)

From: Tom Rix <trix@redhat.com>

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>
---
v2:
  - handle the input error, keep switch
---
 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]) {
-- 
2.26.3


             reply	other threads:[~2021-04-30 14:21 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-30 14:21 trix [this message]
2021-04-30 14:21 ` [PATCH v2] ASoC: codecs: lpass-wsa-macro: handle unexpected input trix
2021-04-30 16:36 ` Srinivas Kandagatla
2021-05-11  8:25 ` Mark Brown
2021-05-11  8:25   ` Mark Brown

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