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| author | David Brownell <dbrownell@users.sourceforge.net> | 2008-07-25 19:44:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-26 12:00:02 -0700 |
| commit | a2e2e3577c3ef2b5dbb866e97e612aae4adfa32f (patch) | |
| tree | 9f0889d3046078e1db7e8310171c7e3a48be42cc /kernel/power | |
| parent | 44ccac13c7f4728cf2992d49384671a176db74dd (diff) | |
| download | lwn-a2e2e3577c3ef2b5dbb866e97e612aae4adfa32f.tar.gz lwn-a2e2e3577c3ef2b5dbb866e97e612aae4adfa32f.zip | |
pm selftest: rtc paranoia
Cope with a quirk of some RTCs (notably ACPI ones) which aren't guaranteed
to implement oneshot behavior when they woke the system from sleeep:
forcibly disable the alarm, just in case.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/main.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/power/main.c b/kernel/power/main.c index 95bff23ecdaa..0b7476f5d2a6 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -635,6 +635,13 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state) } if (status < 0) printk(err_suspend, status); + + /* Some platforms can't detect that the alarm triggered the + * wakeup, or (accordingly) disable it after it afterwards. + * It's supposed to give oneshot behavior; cope. + */ + alm.enabled = false; + rtc_set_alarm(rtc, &alm); } static int __init has_wakealarm(struct device *dev, void *name_ptr) |