selftests: efivarfs: remove the test_create_read file if it was exist

After the first run, the test case 'test_create_read' will always
fail because the file is exist and file's attr is 'S_IMMUTABLE',
open with 'O_RDWR' will always return -EPERM.

Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Shuah Khan <shuah@kernel.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/tools/testing/selftests/efivarfs/efivarfs.sh b/tools/testing/selftests/efivarfs/efivarfs.sh
index a47029a799d2..d3866100e884 100755
--- a/tools/testing/selftests/efivarfs/efivarfs.sh
+++ b/tools/testing/selftests/efivarfs/efivarfs.sh
@@ -77,6 +77,10 @@ test_create_empty()
 test_create_read()
 {
         local file=$efivarfs_mount/$FUNCNAME-$test_guid
+        if [ -f $file]; then
+                chattr -i $file
+                rm -rf $file
+        fi
         ./create-read $file
 }