mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

selftests: media_device_test change it to randomize loop count 

Change it to randomize the loop count instead of hardcoded number of times
ioctl is called.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Shuah Khan 2016-06-17 18:05:05 -06:00
parent bff124682e
commit e9c0d44f53
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
tools/testing/selftests/media_tests/media_device_test.c
View File

@ -1,5 +1,5 @@
/*
* media_devkref_test.c - Media Controller Device Kref API Test
* media_device_test.c - Media Controller Device ioctl loop Test
*
* Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com>
* Copyright (c) 2016 Samsung Electronics Co., Ltd.
@ -35,13 +35,14 @@
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <time.h>
#include <linux/media.h>
int main(int argc, char **argv)
{
int opt;
char media_device[256];
int count = 0;
int count;
struct media_device_info mdi;
int ret;
int fd;
@ -69,6 +70,10 @@ int main(int argc, char **argv)
exit(-1);
}
/* Generate random number of interations */
srand((unsigned int) time(NULL));
count = rand();
/* Open Media device and keep it open */
fd = open(media_device, O_RDWR);
if (fd == -1) {
@ -82,14 +87,16 @@ int main(int argc, char **argv)
"other Oops in the dmesg. Enable KaSan kernel\n"
"config option for use-after-free error detection.\n\n");
while (count < 100) {
printf("Running test for %d iternations\n", count);
while (count > 0) {
ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi);
if (ret < 0)
printf("Media Device Info errno %s\n", strerror(errno));
else
printf("Media device model %s driver %s\n",
mdi.model, mdi.driver);
printf("Media device model %s driver %s - count %d\n",
mdi.model, mdi.driver, count);
sleep(10);
count++;
count--;
}
}