Replace GPL license statement with SPDX GPL-2.0 license identifier.
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>

Change it to randomize the loop count instead of hardcoded number of times
ioctl is called.
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>

Fix the incorrect usage information.
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>

Fix to print information returned by ioctl only when
it returns success.
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>

This test opens user specified Media Device and calls
MEDIA_IOC_DEVICE_INFO ioctl in a loop once every 10
seconds. This test is for detecting errors in device
removal path.

Usage:
    sudo ./media_device_test -d /dev/mediaX

While test is running, remove the device and
ensure there are no use after free errors and
other Oops in the dmesg. Enable KaSan kernel
config option for use-after-free error detection.
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>