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| author | Vladimir Zapolskiy <vzapolskiy@gmail.com> | 2010-09-22 13:05:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-22 17:22:40 -0700 |
| commit | f501ed524b26ba1b739b7f7feb0a0e1496878769 (patch) | |
| tree | e1ca7b22bfca154b3e798d6b007d0c220dc185be /drivers/rtc | |
| parent | 2aeadc30de45a72648f271603203ab392b80f607 (diff) | |
| download | linux-stable-f501ed524b26ba1b739b7f7feb0a0e1496878769.tar.gz linux-stable-f501ed524b26ba1b739b7f7feb0a0e1496878769.tar.bz2 linux-stable-f501ed524b26ba1b739b7f7feb0a0e1496878769.zip | |
rtc: s3c: balance state changes of wakeup flag
This change resolves a problem about unbalanced calls of
enable_irq_wakeup() and disable_irq_wakeup() for alarm interrupt.
Bug reproduction:
root@eb600:~# echo 0 > /sys/class/rtc/rtc0/wakealarm
WARNING: at kernel/irq/manage.c:361 set_irq_wake+0x7c/0xe4()
Unbalanced IRQ 46 wake disable
Modules linked in:
[<c0025708>] (unwind_backtrace+0x0/0xd8) from [<c003358c>] (warn_slowpath_common+0x44/0x5c)
[<c003358c>] (warn_slowpath_common+0x44/0x5c) from [<c00335dc>] (warn_slowpath_fmt+0x24/0x30)
[<c00335dc>] (warn_slowpath_fmt+0x24/0x30) from [<c0058c20>] (set_irq_wake+0x7c/0xe4)
[<c0058c20>] (set_irq_wake+0x7c/0xe4) from [<c01b5e80>] (s3c_rtc_setalarm+0xa8/0xb8)
[<c01b5e80>] (s3c_rtc_setalarm+0xa8/0xb8) from [<c01b47a0>] (rtc_set_alarm+0x60/0x74)
[<c01b47a0>] (rtc_set_alarm+0x60/0x74) from [<c01b5a98>] (rtc_sysfs_set_wakealarm+0xc8/0xd8)
[<c01b5a98>] (rtc_sysfs_set_wakealarm+0xc8/0xd8) from [<c01891ec>] (dev_attr_store+0x20/0x24)
[<c01891ec>] (dev_attr_store+0x20/0x24) from [<c00be934>] (sysfs_write_file+0x104/0x13c)
[<c00be934>] (sysfs_write_file+0x104/0x13c) from [<c0080e7c>] (vfs_write+0xb0/0x158)
[<c0080e7c>] (vfs_write+0xb0/0x158) from [<c0080fcc>] (sys_write+0x3c/0x68)
[<c0080fcc>] (sys_write+0x3c/0x68) from [<c0020ec0>] (ret_fast_syscall+0x0/0x28)
Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Ben Dooks <ben@fluff.org.uk>
Cc: Atul Dahiya <atul.dahiya@samsung.com>
Cc: Taekgyun Ko <taeggyun.ko@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
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, 8 insertions, 5 deletions
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index a0d3ec89d412..f57a87f4ae96 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -310,11 +310,6 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) s3c_rtc_setaie(alrm->enabled); - if (alrm->enabled) - enable_irq_wake(s3c_rtc_alarmno); - else - disable_irq_wake(s3c_rtc_alarmno); - return 0; } @@ -587,6 +582,10 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) ticnt_en_save &= S3C64XX_RTCCON_TICEN; } s3c_rtc_enable(pdev, 0); + + if (device_may_wakeup(&pdev->dev)) + enable_irq_wake(s3c_rtc_alarmno); + return 0; } @@ -600,6 +599,10 @@ static int s3c_rtc_resume(struct platform_device *pdev) tmp = readb(s3c_rtc_base + S3C2410_RTCCON); writeb(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON); } + + if (device_may_wakeup(&pdev->dev)) + disable_irq_wake(s3c_rtc_alarmno); + return 0; } #else |