diff mbox series

[PATCHv3,1/2] hwrng: optee: handle unlimited data rates

Message ID 20200806100010.20509-1-jorge@foundries.io
State Accepted
Commit 340939933e841bca50324d324e6a7ccf9b42999f
Headers show
Series [PATCHv3,1/2] hwrng: optee: handle unlimited data rates | expand

Commit Message

Jorge Ramirez-Ortiz, Foundries Aug. 6, 2020, 10 a.m. UTC 
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 mbox series

Patch

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);