diff options
| author | Dmitry Shmidt <dimitrysh@google.com> | 2014-10-31 16:05:46 -0700 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:53:39 -0800 |
| commit | dd0c7788b67fed52d2d2b9893f7290e3c63757b8 (patch) | |
| tree | 0185a93d2524e4d16dc95f8b66249a2de7e5508f /kernel/power | |
| parent | 57caa2ad5ce35bedb7ab374a2e5b4d7adf63da2b (diff) | |
power: Add check_wakeup_reason() to verify wakeup source irq
Wakeup reason is set before driver resume handlers are called.
It is cleared before driver suspend handlers are called, on
PM_SUSPEND_PREPARE.
Change-Id: I04218c9b0c115a7877e8029c73e6679ff82e0aa4
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/wakeup_reason.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/kernel/power/wakeup_reason.c b/kernel/power/wakeup_reason.c index 2aacc34ef17c..085c99edca06 100644 --- a/kernel/power/wakeup_reason.c +++ b/kernel/power/wakeup_reason.c @@ -34,7 +34,7 @@ static int irqcount; static bool suspend_abort; static char abort_reason[MAX_SUSPEND_ABORT_LEN]; static struct kobject *wakeup_reason; -static spinlock_t resume_reason_lock; +static DEFINE_SPINLOCK(resume_reason_lock); static ssize_t last_resume_reason_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) @@ -95,6 +95,21 @@ void log_wakeup_reason(int irq) spin_unlock(&resume_reason_lock); } +int check_wakeup_reason(int irq) +{ + int irq_no; + int ret = false; + + spin_lock(&resume_reason_lock); + for (irq_no = 0; irq_no < irqcount; irq_no++) + if (irq_list[irq_no] == irq) { + ret = true; + break; + } + spin_unlock(&resume_reason_lock); + return ret; +} + void log_suspend_abort_reason(const char *fmt, ...) { va_list args; @@ -141,7 +156,7 @@ static struct notifier_block wakeup_reason_pm_notifier_block = { int __init wakeup_reason_init(void) { int retval; - spin_lock_init(&resume_reason_lock); + retval = register_pm_notifier(&wakeup_reason_pm_notifier_block); if (retval) printk(KERN_WARNING "[%s] failed to register PM notifier %d\n", |