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hwrng: ks-sa - fix division by zero in ks_sa_rng_init

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Fix division by zero in ks_sa_rng_init caused by missing clock
pointer initialization. The clk_get_rate() call is performed on
an uninitialized clk pointer, resulting in division by zero when
calculating delay values.

Add clock initialization code before using the clock.

Fixes: 6d01d8511d ("hwrng: ks-sa - Add minimum sleep time before ready-polling")
Signed-off-by: Nishanth Menon <nm@ti.com>

 drivers/char/hw_random/ks-sa-rng.c | 7 +++++++
 1 file changed, 7 insertions(+)
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Nishanth Menon
2025-09-19 08:20:02 -05:00
committed by Herbert Xu
parent 5851afffe2
commit 612b1dfeb4
1 changed files with 4 additions and 0 deletions
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4
drivers/char/hw_random/ks-sa-rng.c
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@@ -231,6 +231,10 @@ static int ks_sa_rng_probe(struct platform_device *pdev)
if (IS_ERR(ks_sa_rng->regmap_cfg))
return dev_err_probe(dev, -EINVAL, "syscon_node_to_regmap failed\n");
ks_sa_rng->clk = devm_clk_get_enabled(dev, NULL);
if (IS_ERR(ks_sa_rng->clk))
return dev_err_probe(dev, PTR_ERR(ks_sa_rng->clk), "Failed to get clock\n");
pm_runtime_enable(dev);
ret = pm_runtime_resume_and_get(dev);
if (ret < 0) {