]> err.no Git - linux-2.6/commit
rtc: fix CMOS time error after writing /proc/acpi/alarm
authorHuacai Chen <huacai.chen@intel.com>
Fri, 4 Jul 2008 16:59:31 +0000 (09:59 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 4 Jul 2008 17:40:05 +0000 (10:40 -0700)
commitcce3ce89c1abde1298dd0e769ab9c14ea95d7384
treefc1ab92f843d28ba4aff86e5c6e0ea225868478f
parent471d47e3223311d2638755717f97dc9a298f6dc9
rtc: fix CMOS time error after writing /proc/acpi/alarm

When writing /proc/acpi/alarm in adjust mode, e.g.
echo "+0000-00-00 00:00:15" >/proc/acpi/alarm
The "century" field should be read and added to "year" field before
writing, otherwise the CMOS time will go back to 2000 years ago, e.g.
# cat /proc/acpi/alarm
0008-06-21 11:38:46
Then the system time may be reset to the date of manufacture after
rebooting. This patch fixed this issue.

Signed-off-by: Huacai Chen <huacai.chen@intel.com>
Acked-by: Pavel Machek <pavel@suse.cz>
Acked-by: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/acpi/sleep/proc.c