hwrng: mtk - handle devm_pm_runtime_enable errors

[ Upstream commit 522a242a18adc5c63a24836715dbeec4dc3faee1 ]

Although unlikely, devm_pm_runtime_enable() call might fail, so handle
the return value.

Fixes: 78cb66caa6ab ("hwrng: mtk - Use devm_pm_runtime_enable")
Signed-off-by: Ovidiu Panait <ovidiu.panait.oss@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/char/hw_random/mtk-rng.c b/drivers/char/hw_random/mtk-rng.c
index 3e00506543b69cd84b83f9d99d4643d84c64f01f..72269d0f2a4ecd842442974164e95cf802f3a076 100644 (file)
--- a/drivers/char/hw_random/mtk-rng.c
+++ b/drivers/char/hw_random/mtk-rng.c
@@ -142,7 +142,9 @@ static int mtk_rng_probe(struct platform_device *pdev)
        dev_set_drvdata(&pdev->dev, priv);
        pm_runtime_set_autosuspend_delay(&pdev->dev, RNG_AUTOSUSPEND_TIMEOUT);
        pm_runtime_use_autosuspend(&pdev->dev);
-       devm_pm_runtime_enable(&pdev->dev);
+       ret = devm_pm_runtime_enable(&pdev->dev);
+       if (ret)
+               return ret;
 
        dev_info(&pdev->dev, "registered RNG driver\n");