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authorRijo Thomas <Rijo-john.Thomas@amd.com>2021-03-15 09:25:28 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2021-03-26 10:02:34 +0100
commit4a5eed1734933bcab8f70b60cc0912867d15423d (patch)
tree447a995c8112eddbce9065bbed7c3738f51102e3 /drivers/crypto/ccp
parenthwrng: intel - Fix included header from 'asm (diff)
downloadlinux-4a5eed1734933bcab8f70b60cc0912867d15423d.tar.xz
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crypto: ccp - reduce tee command status polling interval from 5ms to 1ms
The PSP TEE device driver polls the command status variable every 5ms to check for command completion. Reduce this time to 1ms so that there is an improvement in driver response time to clients which submit TEE commands. Reviewed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com> Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp')
-rw-r--r--drivers/crypto/ccp/tee-dev.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/crypto/ccp/tee-dev.c b/drivers/crypto/ccp/tee-dev.c
index 5e697a90ea7f..910b71df2aef 100644
--- a/drivers/crypto/ccp/tee-dev.c
+++ b/drivers/crypto/ccp/tee-dev.c
@@ -5,7 +5,7 @@
* Author: Rijo Thomas <Rijo-john.Thomas@amd.com>
* Author: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
*
- * Copyright 2019 Advanced Micro Devices, Inc.
+ * Copyright (C) 2019,2021 Advanced Micro Devices, Inc.
*/
#include <linux/types.h>
@@ -309,14 +309,14 @@ static int tee_wait_cmd_completion(struct psp_tee_device *tee,
struct tee_ring_cmd *resp,
unsigned int timeout)
{
- /* ~5ms sleep per loop => nloop = timeout * 200 */
- int nloop = timeout * 200;
+ /* ~1ms sleep per loop => nloop = timeout * 1000 */
+ int nloop = timeout * 1000;
while (--nloop) {
if (resp->cmd_state == TEE_CMD_STATE_COMPLETED)
return 0;
- usleep_range(5000, 5100);
+ usleep_range(1000, 1100);
}
dev_err(tee->dev, "tee: command 0x%x timed out, disabling PSP\n",