A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-10 06:09:23 -04:00
Code Issues Projects Releases Packages Wiki Activity

qseecom: retry scm call if app is busy

Browse source 
When KeyMaster (KM) app is occupied by Identity Credential (IC) app and
any client requests some functionality from KM app then scm call failure 
is observed with response code indicating KM app is busy. In this case 
same scm call should be retried few more times to check if app can serve
it. Bail out with failure if retry count expires.

Change-Id: Icb092ff0a6b3b313197cf6a21f74caeaf6c576a1
Signed-off-by: sumikush <sumikush@codeaurora.org>
This commit is contained in:
sumikush 2021-05-24 19:42:45 +05:30
commit de5f115df0
1 changed files with 4 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

6
drivers/misc/qseecom.c
View file

@ -470,6 +470,8 @@ static void __qseecom_free_coherent_buf(uint32_t size,
#define QSEECOM_SCM_EBUSY_WAIT_MS 30
#define QSEECOM_SCM_EBUSY_MAX_RETRY 67
#define QSEE_RESULT_FAIL_APP_BUSY 315
static int __qseecom_scm_call2_locked(uint32_t smc_id, struct scm_desc *desc)
{
int ret = 0;
@ -477,14 +479,14 @@ static int __qseecom_scm_call2_locked(uint32_t smc_id, struct scm_desc *desc)
do {
ret = qcom_scm_qseecom_call_noretry(smc_id, desc);
if (ret == -EBUSY) {
if ((ret == -EBUSY) || (desc && (desc->ret[0] == -QSEE_RESULT_FAIL_APP_BUSY))) {
mutex_unlock(&app_access_lock);
msleep(QSEECOM_SCM_EBUSY_WAIT_MS);
mutex_lock(&app_access_lock);
}
if (retry_count == 33)
pr_warn("secure world has been busy for 1 second!\n");
} while (ret == -EBUSY &&
} while (((ret == -EBUSY) || (desc && (desc->ret[0] == -QSEE_RESULT_FAIL_APP_BUSY))) &&
(retry_count++ < QSEECOM_SCM_EBUSY_MAX_RETRY));
return ret;
}