kselftests: timers: Fix inconsistency-check to not ignore first timestamp

When the first timestamp in the list of clock readings was later than
the second timestamp and all other timestamps were in order, the
inconsistency was not reported because the index of the out-of-order
timestamp was equal to the default value.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Miroslav Lichvar <mlichvar@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>

diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
index caf1bc9257c4198ee8ccdf064b5e42c221aab5f9..74c60e8759a017dee58604860e111c8cfb5a2e76 100644 (file)
--- a/tools/testing/selftests/timers/inconsistency-check.c
+++ b/tools/testing/selftests/timers/inconsistency-check.c
@@ -118,7 +118,7 @@ int consistency_test(int clock_type, unsigned long seconds)
        start_str = ctime(&t);
 
        while (seconds == -1 || now - then < seconds) {
-               inconsistent = 0;
+               inconsistent = -1;
 
                /* Fill list */
                for (i = 0; i < CALLS_PER_LOOP; i++)
@@ -130,7 +130,7 @@ int consistency_test(int clock_type, unsigned long seconds)
                                inconsistent = i;
 
                /* display inconsistency */
-               if (inconsistent) {
+               if (inconsistent >= 0) {
                        unsigned long long delta;
 
                        printf("\%s\n", start_str);