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| author | Nishanth Menon <nm@ti.com> | 2025-09-19 08:20:02 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-15 11:58:05 +0200 |
| commit | f4238064379a91e71a9c258996acac43c50c2094 (patch) | |
| tree | ac24e6e2ee25bfbd42e04c0e2a2ab72c00e46dbe /drivers | |
| parent | 96ca6913042ec2321c5b6f58028eff449335d3ba (diff) | |
| download | linux-f4238064379a91e71a9c258996acac43c50c2094.tar.gz linux-f4238064379a91e71a9c258996acac43c50c2094.tar.bz2 linux-f4238064379a91e71a9c258996acac43c50c2094.zip | |
hwrng: ks-sa - fix division by zero in ks_sa_rng_init
[ 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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/hw_random/ks-sa-rng.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c index 2f2f21f1b659..d7b42888f25c 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) { |