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| author | Jorge Ramirez-Ortiz <jorge@foundries.io> | 2020-08-06 13:00:09 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-08-21 07:45:28 +0300 |
| commit | 340939933e841bca50324d324e6a7ccf9b42999f (patch) | |
| tree | 865993c15974357464e597b1760bbad4fdcad0cd /drivers/char/hw_random | |
| parent | 3a95887e27ab7c2492b7c9c831805e9f1794863b (diff) | |
| download | linux-340939933e841bca50324d324e6a7ccf9b42999f.tar.xz | |
hwrng: optee - handle unlimited data rates
Data rates of MAX_UINT32 will schedule an unnecessary one jiffy
timeout on the call to msleep. Avoid this scenario by using 0 as the
unlimited data rate.
Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random')
| -rw-r--r-- | drivers/char/hw_random/optee-rng.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/hw_random/optee-rng.c b/drivers/char/hw_random/optee-rng.c index 49b2e02537dd..5bc4700c4dae 100644 --- a/drivers/char/hw_random/optee-rng.c +++ b/drivers/char/hw_random/optee-rng.c @@ -128,7 +128,7 @@ static int optee_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait) data += rng_size; read += rng_size; - if (wait) { + if (wait && pvt_data->data_rate) { if (timeout-- == 0) return read; msleep((1000 * (max - read)) / pvt_data->data_rate); |