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hwrng: omap3-rom - Handle return value of clk_prepare_enable
Here, Clock enable can failed. So adding an error check for clk_prepare_enable. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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cce2ea8d90
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1 changed files with 9 additions and 2 deletions
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@ -53,7 +53,10 @@ static int omap3_rom_rng_get_random(void *buf, unsigned int count)
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cancel_delayed_work_sync(&idle_work);
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if (rng_idle) {
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clk_prepare_enable(rng_clk);
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r = clk_prepare_enable(rng_clk);
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if (r)
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return r;
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r = omap3_rom_rng_call(0, 0, RNG_GEN_PRNG_HW_INIT);
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if (r != 0) {
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clk_disable_unprepare(rng_clk);
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@ -88,6 +91,8 @@ static struct hwrng omap3_rom_rng_ops = {
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static int omap3_rom_rng_probe(struct platform_device *pdev)
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{
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int ret = 0;
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pr_info("initializing\n");
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omap3_rom_rng_call = pdev->dev.platform_data;
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@ -104,7 +109,9 @@ static int omap3_rom_rng_probe(struct platform_device *pdev)
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}
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/* Leave the RNG in reset state. */
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clk_prepare_enable(rng_clk);
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ret = clk_prepare_enable(rng_clk);
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if (ret)
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return ret;
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omap3_rom_rng_idle(0);
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return hwrng_register(&omap3_rom_rng_ops);
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