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crypto: qcom-rng - Enable clock in hwrng case

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Fix qcom-rng.c to enable the clock before accessing the hardware.

Fixes: f29cd5bb64 ("crypto: qcom-rng - Add hw_random interface support")
Cc: stable@vger.kernel.org
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
2026-06-08 17:58:45 +00:00
committed by Herbert Xu
parent d41a9fcfb7
commit 0fd97bbda2
1 changed files with 16 additions and 0 deletions
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16
drivers/crypto/qcom-rng.c
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@@ -113,6 +113,13 @@ static int qcom_rng_seed(struct crypto_rng *tfm, const u8 *seed,
return 0;
}
static int qcom_hwrng_init(struct hwrng *hwrng)
{
struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng);
return clk_prepare_enable(qrng->clk);
}
static int qcom_hwrng_read(struct hwrng *hwrng, void *data, size_t max, bool wait)
{
struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng);
@@ -120,6 +127,13 @@ static int qcom_hwrng_read(struct hwrng *hwrng, void *data, size_t max, bool wai
return qcom_rng_read(qrng, data, max);
}
static void qcom_hwrng_cleanup(struct hwrng *hwrng)
{
struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng);
clk_disable_unprepare(qrng->clk);
}
static int qcom_rng_enable(struct qcom_rng *rng)
{
u32 val;
@@ -208,7 +222,9 @@ static int qcom_rng_probe(struct platform_device *pdev)
if (rng->match_data->hwrng_support) {
rng->hwrng.name = "qcom_hwrng";
rng->hwrng.init = qcom_hwrng_init;
rng->hwrng.read = qcom_hwrng_read;
rng->hwrng.cleanup = qcom_hwrng_cleanup;
rng->hwrng.quality = QCOM_TRNG_QUALITY;
ret = devm_hwrng_register(&pdev->dev, &rng->hwrng);
if (ret) {