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hwrng: ingenic - Fix a resource leak in an error handling path

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[ Upstream commit c4ff41b93d1f10d1b8be258c31a0436c5769fc00 ]

In case of error, we should call 'clk_disable_unprepare()' to undo a
previous 'clk_prepare_enable()' call, as already done in the remove
function.

Fixes: 406346d222 ("hwrng: ingenic - Add hardware TRNG for Ingenic X1830")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Tested-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christophe JAILLET 2020-12-19 08:52:07 +01:00 committed by Greg Kroah-Hartman
parent 39e0bddeff
commit 5ea0601513
1 changed files with 5 additions and 1 deletions
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6
drivers/char/hw_random/ingenic-trng.c
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@ -113,13 +113,17 @@ static int ingenic_trng_probe(struct platform_device *pdev)
ret = hwrng_register(&trng->rng);
if (ret) {
dev_err(&pdev->dev, "Failed to register hwrng\n");
return ret;
goto err_unprepare_clk;
}
platform_set_drvdata(pdev, trng);
dev_info(&pdev->dev, "Ingenic DTRNG driver registered\n");
return 0;
err_unprepare_clk:
clk_disable_unprepare(trng->clk);
return ret;
}
static int ingenic_trng_remove(struct platform_device *pdev)