Describe function_hd_test_mount_prepare here.
= NAME =
hd_test_clean_umount

= SYNOPSIS =
hd_test_clean_umount <mount_device> <mount_point_dir>

= DESCRIPTION =
This function remove the test directory mounted filesystem, and then unmounts the block device from the filesystem of the target.

If the block device has the string "ROOT", this function will only remove the
test directory, and not unmount the filesystem.

= EXAMPLES =
Here are some sample invocations:
{{{#!YellowBox
hd_test_clean_umount $BENCHMARK_TIOBENCH_MOUNT_BLOCKDEV $BENCHMARK_TIOBENCH_MOUNT_POINT
}}}

{{{#!YellowBox
hd_test_clean_umount $BENCHMARK_IOZONE_MOUNT_BLOCKDEV $BENCHMARK_IOZONE_MOUNT_POINT
}}}

= ENVIRONMENT and ARGUMENTS =
This function takes the following positional arguments:
 * $1 - the device node to unmount
 * $2 - the directory for the mount point

= RETURN =
Returns non-zero on error.

= SOURCE =
Located in ''scripts/functions.sh''

= SEE ALSO =
 * [[function_hd_test_mount_prepare|hs_test_mount_prepare]], [[function_test_run|test_run]]