5.15-stable review patch. If anyone has any objections, please let me know.
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From: Nishanth Menon nm@ti.com
[ Upstream commit 612b1dfeb414dfa780a6316014ceddf9a74ff5c0 ]
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: 6d01d8511dce ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/char/hw_random/ks-sa-rng.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c index 2f2f21f1b659e..d7b42888f25c2 100644 --- a/drivers/char/hw_random/ks-sa-rng.c +++ b/drivers/char/hw_random/ks-sa-rng.c @@ -240,6 +240,10 @@ static int ks_sa_rng_probe(struct platform_device *pdev) return -EINVAL; }
+ 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) {