efi_loader: daylight saving time
Adjust the SetTime() and GetTime() runtime services to correctly convert
the daylight saving time information when communicating with the RTC.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index dea2b4e..1fa1595 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -266,9 +266,13 @@
time->hour = tm.tm_hour;
time->minute = tm.tm_min;
time->second = tm.tm_sec;
- if (tm.tm_isdst)
+ if (tm.tm_isdst > 0)
time->daylight =
EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT;
+ else if (!tm.tm_isdst)
+ time->daylight = EFI_TIME_ADJUST_DAYLIGHT;
+ else
+ time->daylight = 0;
time->timezone = EFI_UNSPECIFIED_TIMEZONE;
if (capabilities) {
@@ -347,8 +351,17 @@
tm.tm_hour = time->hour;
tm.tm_min = time->minute;
tm.tm_sec = time->second;
- tm.tm_isdst = time->daylight ==
- (EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT);
+ switch (time->daylight) {
+ case EFI_TIME_ADJUST_DAYLIGHT:
+ tm.tm_isdst = 0;
+ break;
+ case EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT:
+ tm.tm_isdst = 1;
+ break;
+ default:
+ tm.tm_isdst = -1;
+ break;
+ }
/* Calculate day of week */
rtc_calc_weekday(&tm);