The patch titled
rtc: s3c: balance state changes of wakeup flag
has been added to the -mm tree. Its filename is
rtc-s3c-balance-state-changes-of-wakeup-flag.patch
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------------------------------------------------------
Subject: rtc: s3c: balance state changes of wakeup flag
From: Vladimir Zapolskiy <vzapolskiy@xxxxxxxxx>
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@xxxxxxxxx>
Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
Cc: Ben Dooks <ben@xxxxxxxxxxxx>
Cc: Atul Dahiya <atul.dahiya@xxxxxxxxxxx>
Cc: Taekgyun Ko <taeggyun.ko@xxxxxxxxxxx>
Cc: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/rtc/rtc-s3c.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff -puN drivers/rtc/rtc-s3c.c~rtc-s3c-balance-state-changes-of-wakeup-flag drivers/rtc/rtc-s3c.c
--- a/drivers/rtc/rtc-s3c.c~rtc-s3c-balance-state-changes-of-wakeup-flag
+++ a/drivers/rtc/rtc-s3c.c
@@ -310,11 +310,6 @@ static int s3c_rtc_setalarm(struct devic
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 platfo
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 platfor
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
_
Patches currently in -mm which might be from vzapolskiy@xxxxxxxxx are
rtc-s3c-balance-state-changes-of-wakeup-flag.patch
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