Adds a check to verify if the rtc device file is valid or not and prints a useful error message if the file is not accessible.

Signed-off-by: Atul Kumar Pant atulpant.linux@gmail.com Acked-by: Alexandre Belloni alexandre.belloni@bootlin.com ---

changes since v4: Updated the commit message.

changes since v3: Added Linux-kselftest and Linux-kernel mailing lists.

changes since v2: Changed error message when rtc file does not exist.

changes since v1: Removed check for uid=0 If rtc file is invalid, then exit the test.

tools/testing/selftests/rtc/rtctest.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c index 63ce02d1d5cc..630fef735c7e 100644 --- a/tools/testing/selftests/rtc/rtctest.c +++ b/tools/testing/selftests/rtc/rtctest.c @@ -17,6 +17,7 @@ #include <unistd.h>

#include "../kselftest_harness.h" +#include "../kselftest.h"

#define NUM_UIE 3 #define ALARM_DELTA 3 @@ -419,6 +420,8 @@ __constructor_order_last(void)

int main(int argc, char **argv) { + int ret = -1; + switch (argc) { case 2: rtc_file = argv[1]; @@ -430,5 +433,11 @@ int main(int argc, char **argv) return 1; }

- return test_harness_run(argc, argv); + // Run the test if rtc_file is valid + if (access(rtc_file, F_OK) == 0) + ret = test_harness_run(argc, argv); + else + ksft_exit_fail_msg("[ERROR]: Cannot access rtc file %s - Exiting\n", rtc_file); + + return ret; }