[PATCH] rtc: rtctest: Improve support detection

["Lukáš Doktor" <ldoktor@redhat.com>]

The rtc-generic and opal-rtc are failing to run this test as they do not
support all the features. Let's treat the error returns and skip to the
following test.

Theoretically the test_DATE should be also adjusted, but as it's enabled
on demand I think it makes sense to fail in such case.

Signed-off-by: Lukáš Doktor <ldoktor@redhat.com>
---
 tools/testing/selftests/timers/rtctest.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/timers/rtctest.c b/tools/testing/selftests/timers/rtctest.c
index f61170f..6344842 100644
--- a/tools/testing/selftests/timers/rtctest.c
+++ b/tools/testing/selftests/timers/rtctest.c
@@ -125,7 +125,7 @@ int main(int argc, char **argv)
 	/* Turn on update interrupts (one per second) */
 	retval = ioctl(fd, RTC_UIE_ON, 0);
 	if (retval == -1) {
-		if (errno == EINVAL) {
+		if (errno == EINVAL || errno == EINVAL) {
 			fprintf(stderr,
 				"\n...Update IRQs not supported.\n");
 			goto test_READ;
@@ -221,6 +221,11 @@ int main(int argc, char **argv)
 	/* Read the current alarm settings */
 	retval = ioctl(fd, RTC_ALM_READ, &rtc_tm);
 	if (retval == -1) {
+		if (errno == EINVAL) {
+			fprintf(stderr,
+					"\n...EINVAL reading current alarm setting.\n");
+			goto test_PIE;
+		}
 		perror("RTC_ALM_READ ioctl");
 		exit(errno);
 	}
@@ -231,7 +236,7 @@ int main(int argc, char **argv)
 	/* Enable alarm interrupts */
 	retval = ioctl(fd, RTC_AIE_ON, 0);
 	if (retval == -1) {
-		if (errno == EINVAL) {
+		if (errno == EINVAL || errno ==EIO) {
 			fprintf(stderr,
 				"\n...Alarm IRQs not supported.\n");
 			goto test_PIE;
-- 
2.9.4