From 4e014ff22e4bca97193bc36fd67c2233422690b6 Mon Sep 17 00:00:00 2001 From: Evgeny Novikov Date: Wed, 28 Jul 2021 16:44:32 +0200 Subject: [PATCH] media: tegra-cec: Handle errors of clk_prepare_enable() [ Upstream commit 38367073c796a37a61549b1f66a71b3adb03802d ] 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 Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- 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