From: Evgeny Novikov <novikov@ispras.ru>
To: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Evgeny Novikov <novikov@ispras.ru>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
linux-tegra@vger.kernel.org, linux-media@vger.kernel.org,
linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org
Subject: [PATCH] media: tegra-cec: Handle errors of clk_prepare_enable()
Date: Wed, 28 Jul 2021 17:44:32 +0300 [thread overview]
Message-ID: <20210728144432.23966-1-novikov@ispras.ru> (raw)
tegra_cec_probe() and tegra_cec_resume() ignored possible errors of
clk_prepare_enable(). The patch fixes this.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
---
drivers/media/cec/platform/tegra/tegra_cec.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/media/cec/platform/tegra/tegra_cec.c b/drivers/media/cec/platform/tegra/tegra_cec.c
index 1ac0c70a5981..5e907395ca2e 100644
--- a/drivers/media/cec/platform/tegra/tegra_cec.c
+++ b/drivers/media/cec/platform/tegra/tegra_cec.c
@@ -366,7 +366,11 @@ static int tegra_cec_probe(struct platform_device *pdev)
return -ENOENT;
}
- clk_prepare_enable(cec->clk);
+ ret = clk_prepare_enable(cec->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to prepare clock for CEC\n");
+ return ret;
+ }
/* set context info. */
cec->dev = &pdev->dev;
@@ -446,9 +450,7 @@ static int tegra_cec_resume(struct platform_device *pdev)
dev_notice(&pdev->dev, "Resuming\n");
- clk_prepare_enable(cec->clk);
-
- return 0;
+ return clk_prepare_enable(cec->clk);
}
#endif
--
2.26.2
reply other threads:[~2021-07-28 14:44 UTC|newest]
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