diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2011-05-11 15:13:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-11 18:50:44 -0700 |
| commit | 52cd4e5c620af9e21b5298bf01844b98573505a7 (patch) | |
| tree | 6833280fd9b65c5e59472e9d63b1f975874af05d /drivers/rtc | |
| parent | 9f381a61f58bb6487c93ce2233bb9992f8ea9211 (diff) | |
| download | lwn-52cd4e5c620af9e21b5298bf01844b98573505a7.tar.gz lwn-52cd4e5c620af9e21b5298bf01844b98573505a7.zip | |
drivers/rtc/rtc-s3c.c: fixup wake support for rtc
The driver is not balancing set_irq and disable_irq_wake() calls, so
ensure that it keeps track of whether the wake is enabled.
The fixes the following error on S3C6410 devices:
WARNING: at kernel/irq/manage.c:382 set_irq_wake+0x84/0xec()
Unbalanced IRQ 92 wake disable
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-s3c.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index b3466c491cd3..16512ecae31a 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -46,6 +46,7 @@ static struct clk *rtc_clk; static void __iomem *s3c_rtc_base; static int s3c_rtc_alarmno = NO_IRQ; static int s3c_rtc_tickno = NO_IRQ; +static bool wake_en; static enum s3c_cpu_type s3c_rtc_cpu_type; static DEFINE_SPINLOCK(s3c_rtc_pie_lock); @@ -562,8 +563,12 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) } s3c_rtc_enable(pdev, 0); - if (device_may_wakeup(&pdev->dev)) - enable_irq_wake(s3c_rtc_alarmno); + if (device_may_wakeup(&pdev->dev) && !wake_en) { + if (enable_irq_wake(s3c_rtc_alarmno) == 0) + wake_en = true; + else + dev_err(&pdev->dev, "enable_irq_wake failed\n"); + } return 0; } @@ -579,8 +584,10 @@ static int s3c_rtc_resume(struct platform_device *pdev) writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON); } - if (device_may_wakeup(&pdev->dev)) + if (device_may_wakeup(&pdev->dev) && wake_en) { disable_irq_wake(s3c_rtc_alarmno); + wake_en = false; + } return 0; } |