tree ddb2adece6e4d755c6d096b9259886571c8c19ec
parent 33751b9ed01ee46fd1c20cf8c42c396704d88b28
author Ales Novak <alnovak@suse.cz> 1402090539 -0700
committer Jiri Slaby <jslaby@suse.cz> 1409055145 +0200

drivers/rtc/interface.c: fix infinite loop in initializing the alarm

commit ee1d90146815fdc8d653c558b327fff2acba041d upstream.

In __rtc_read_alarm(), if the alarm time retrieved by
rtc_read_alarm_internal() from the device contains invalid values (e.g.
month=2,mday=31) and the year not set (=-1), the initialization will
loop infinitely because the year-fixing loop expects the time being
invalid due to leap year.

Fix reduces the loop to the leap years and adds final validity check.

Signed-off-by: Ales Novak <alnovak@suse.cz>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Reported-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>