diff options
| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2009-06-19 03:49:09 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-20 03:46:05 +0400 |
| commit | e6229bec25be4ba00f31dd26e25721cc96c22262 (patch) | |
| tree | a27e4c51dd8b9aaeb589a147a22bbd06bde77cf0 /drivers/rtc/rtc-dev.c | |
| parent | 575c5807f6842422e9fe2432fd48dfcc1d7aef41 (diff) | |
| download | linux-e6229bec25be4ba00f31dd26e25721cc96c22262.tar.xz | |
rtc: make rtc_update_irq callable with irqs enabled
The rtc_update_irq() might be called with irqs enabled, if a interrupt
handler was registered without IRQF_DISABLED. Use
spin_lock_irqsave/spin_unlock_irqrestore instead of spin_lock/spin_unlock.
Also update kerneldoc and drivers which do extra work to follow the
current interface spec, as suggestted by David Brownell.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-dev.c')
| -rw-r--r-- | drivers/rtc/rtc-dev.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c index 45152f4952d6..8a11de9552cd 100644 --- a/drivers/rtc/rtc-dev.c +++ b/drivers/rtc/rtc-dev.c @@ -60,8 +60,7 @@ static void rtc_uie_task(struct work_struct *work) err = rtc_read_time(rtc, &tm); - local_irq_disable(); - spin_lock(&rtc->irq_lock); + spin_lock_irq(&rtc->irq_lock); if (rtc->stop_uie_polling || err) { rtc->uie_task_active = 0; } else if (rtc->oldsecs != tm.tm_sec) { @@ -74,10 +73,9 @@ static void rtc_uie_task(struct work_struct *work) } else if (schedule_work(&rtc->uie_task) == 0) { rtc->uie_task_active = 0; } - spin_unlock(&rtc->irq_lock); + spin_unlock_irq(&rtc->irq_lock); if (num) rtc_update_irq(rtc, num, RTC_UF | RTC_IRQF); - local_irq_enable(); } static void rtc_uie_timer(unsigned long data) { |