]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
rtc: refine rtc_timer_do_work() to consider other set alarm failures
authorXunlei Pang <pang.xunlei@linaro.org>
Wed, 10 Dec 2014 23:54:26 +0000 (15:54 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 11 Dec 2014 01:41:16 +0000 (17:41 -0800)
commit6528b889955d36caa06712789746cfbd0ecf3898
treec17dacc3c12b081cc396b37738c09acf22fb4113
parentc594d6787919692001ac7c16f08646a8ec36180a
rtc: refine rtc_timer_do_work() to consider other set alarm failures

rtc_timer_do_work() only judges -ETIME failure of__rtc_set_alarm(), but
doesn't handle other failures like -EIO, -EBUSY, etc.

If there is a failure other than -ETIME, the next rtc_timer will stay in
the timerqueue.  Then later rtc_timers will be enqueued directly because
they have a later expires time, so the alarm irq will never be programmed.

When such failures happen, this patch will retry __rtc_set_alarm(), if
still can't program the alarm time, it will remove current rtc_timer from
timerqueue and fetch next one, thus preventing it from affecting other rtc
timers.

Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Arnd Bergmann <arnd.bergmann@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/rtc/interface.c