Martin L Roth has uploaded this change for review.

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lib/rtc: Fix off-by-one error in February day count in leap year

The month argument passed to rtc_month_days is 0-based, not 1-based.
This results in the RTC being reverted to the build date constantly
on 29th February 2024.

Change-Id: If451e3e3471fef0d429e255cf297050a525ca1a2
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80790
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Michał Kopeć <michal.kopec@3mdeb.com>
(cherry picked from commit adf042f6c61e92c181171118768e4309d87146b1)
---
M src/lib/rtc.c
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/23/80823/1
diff --git a/src/lib/rtc.c b/src/lib/rtc.c
index d151480..3eeac27 100644
--- a/src/lib/rtc.c
+++ b/src/lib/rtc.c
@@ -126,7 +126,7 @@
{
int month_days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

- return month_days[month] + (LEAP_YEAR(year) && month == 2);
+ return month_days[month] + (LEAP_YEAR(year) && month == 1);
}

int rtc_invalid(const struct rtc_time *tm)

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Gerrit-Project: coreboot
Gerrit-Branch: 24.02_branch
Gerrit-Change-Id: If451e3e3471fef0d429e255cf297050a525ca1a2
Gerrit-Change-Number: 80823
Gerrit-PatchSet: 1
Gerrit-Owner: Martin L Roth <gaumless@gmail.com>
Gerrit-CC: Michał Żygowski <michal.zygowski@3mdeb.com>
Gerrit-MessageType: newchange