Messages in this thread Patch in this message | | | From | Jorge Ramirez-Ortiz <> | Subject | [PATCHv3 1/2] hwrng: optee: handle unlimited data rates | Date | Thu, 6 Aug 2020 12:00:09 +0200 |
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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> --- drivers/char/hw_random/optee-rng.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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); -- 2.17.1
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