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selftests/ptp: Fix timestamp printf format for PTP_SYS_OFFSET

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[ Upstream commit 76a4c8b82938bc5020b67663db41f451684bf327 ]

Previously, timestamps were printed using "%lld.%u" which is incorrect
for nanosecond values lower than 100,000,000 as they're fractional
digits, therefore leading zeros are meaningful.

This patch changes the format strings to "%lld.%09u" in order to add
leading zeros to the nanosecond value.

Fixes: 568ebc5985 ("ptp: add the PTP_SYS_OFFSET ioctl to the testptp program")
Fixes: 4ec54f9573 ("ptp: Fix compiler warnings in the testptp utility")
Fixes: 6ab0e475f1 ("Documentation: fix misc. warnings")
Signed-off-by: Alex Maftei <alex.maftei@amd.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://lore.kernel.org/r/20230615083404.57112-1-alex.maftei@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Maftei 2023-06-15 09:34:04 +01:00 committed by Greg Kroah-Hartman
parent 1140f8bc29
commit 98acd5f0ce
1 changed files with 3 additions and 3 deletions
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6
tools/testing/selftests/ptp/testptp.c
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@ -455,11 +455,11 @@ int main(int argc, char *argv[])
interval = t2 - t1;
offset = (t2 + t1) / 2 - tp;
printf("system time: %lld.%u\n",
printf("system time: %lld.%09u\n",
(pct+2*i)->sec, (pct+2*i)->nsec);
printf("phc time: %lld.%u\n",
printf("phc time: %lld.%09u\n",
(pct+2*i+1)->sec, (pct+2*i+1)->nsec);
printf("system time: %lld.%u\n",
printf("system time: %lld.%09u\n",
(pct+2*i+2)->sec, (pct+2*i+2)->nsec);
printf("system/phc clock time offset is %" PRId64 " ns\n"
"system clock time delay is %" PRId64 " ns\n",