Change it to randomize the loop count instead of hardcoded number of times ioctl is called.
Signed-off-by: Shuah Khan <[email protected]> --- .../testing/selftests/media_tests/media_device_test.c | 19 +++++++++++++------ 1 file 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 cbf53a0..5d49943 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 <[email protected]> * 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--; } } -- 2.7.4
