linux-kernel - [PATCH next] ASoC: cs35l56: Fix unsigned 'rv' comparison with zero in cs35l56

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Date:   Thu, 23 Mar 2023 09:58:25 -0700
From:   Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     error27@...il.com,
        Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
        James Schulman <james.schulman@...rus.com>,
        David Rhodes <david.rhodes@...rus.com>,
        Lucas Tanure <tanureal@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Simon Trimmer <simont@...nsource.cirrus.com>,
        alsa-devel@...a-project.org, patches@...nsource.cirrus.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH next] ASoC: cs35l56: Fix unsigned 'rv' comparison with zero in cs35l56_irq()

'rv' is of type unsigned int, which can never be less than zero.

	rv = pm_runtime_resume_and_get(cs35l56->dev);
	if (rv < 0) { // can never be true.
		...
	}

As pm_runtime_resume_and_get returns integers, change the type of 'rv'
to int to fix this.

This is found by static analysis with smatch.

Fixes: e49611252900 ("ASoC: cs35l56: Add driver for Cirrus Logic CS35L56")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
Only compile tested.
---
 sound/soc/codecs/cs35l56.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c
index 90fc79b5666d..b3772005668a 100644
--- a/sound/soc/codecs/cs35l56.c
+++ b/sound/soc/codecs/cs35l56.c
@@ -321,7 +321,8 @@ irqreturn_t cs35l56_irq(int irq, void *data)
 	struct cs35l56_private *cs35l56 = data;
 	unsigned int status1 = 0, status8 = 0, status20 = 0;
 	unsigned int mask1, mask8, mask20;
-	unsigned int rv, val;
+	unsigned int val;
+	int rv;
 	irqreturn_t ret = IRQ_NONE;
 
 	if (!cs35l56->init_done)
-- 
2.38.1