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>

1 files changed, 13 insertions, 6 deletions

diff --git a/tools/testing/selftests/media_tests/media_device_test.c b/tools/testing/selftests/media_tests/media_device_test.c
index cbf53a032ab5..5d49943e77d0 100644
--- a/tools/testing/selftests/media_tests/media_device_test.c
+++ b/tools/testing/selftests/media_tests/media_device_test.c
@@ -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--;
         }
 }