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hwrng: optee - handle unlimited data rates

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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>
This commit is contained in:
Jorge Ramirez-Ortiz 2020-08-06 12:00:09 +02:00 committed by Herbert Xu
parent 3a95887e27
commit 340939933e
1 changed files with 1 additions and 1 deletions
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2
drivers/char/hw_random/optee-rng.c
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@ -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);