diff options
| author | Ruchi Kandoi <kandoiruchi@google.com> | 2014-10-29 10:36:27 -0700 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:53:38 -0800 |
| commit | 57caa2ad5ce35bedb7ab374a2e5b4d7adf63da2b (patch) | |
| tree | 960197e19ff7a3e40d0380935da2cec972155dfe /kernel/power/wakeup_reason.c | |
| parent | 1adb5b403433616585cae7fa22a61ede2400319a (diff) | |
power: Adds functionality to log the last suspend abort reason.
Extends the last_resume_reason to log suspend abort reason. The abort
reasons will have "Abort:" appended at the start to distinguish itself
from the resume reason.
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
Change-Id: I3207f1844e3d87c706dfc298fb10e1c648814c5f
Diffstat (limited to 'kernel/power/wakeup_reason.c')
| -rw-r--r-- | kernel/power/wakeup_reason.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/kernel/power/wakeup_reason.c b/kernel/power/wakeup_reason.c index 187e4e9105fb..2aacc34ef17c 100644 --- a/kernel/power/wakeup_reason.c +++ b/kernel/power/wakeup_reason.c @@ -31,6 +31,8 @@ #define MAX_WAKEUP_REASON_IRQS 32 static int irq_list[MAX_WAKEUP_REASON_IRQS]; 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; @@ -40,14 +42,18 @@ static ssize_t last_resume_reason_show(struct kobject *kobj, struct kobj_attribu int irq_no, buf_offset = 0; struct irq_desc *desc; spin_lock(&resume_reason_lock); - for (irq_no = 0; irq_no < irqcount; irq_no++) { - desc = irq_to_desc(irq_list[irq_no]); - if (desc && desc->action && desc->action->name) - buf_offset += sprintf(buf + buf_offset, "%d %s\n", - irq_list[irq_no], desc->action->name); - else - buf_offset += sprintf(buf + buf_offset, "%d\n", - irq_list[irq_no]); + if (suspend_abort) { + buf_offset = sprintf(buf, "Abort: %s", abort_reason); + } else { + for (irq_no = 0; irq_no < irqcount; irq_no++) { + desc = irq_to_desc(irq_list[irq_no]); + if (desc && desc->action && desc->action->name) + buf_offset += sprintf(buf + buf_offset, "%d %s\n", + irq_list[irq_no], desc->action->name); + else + buf_offset += sprintf(buf + buf_offset, "%d\n", + irq_list[irq_no]); + } } spin_unlock(&resume_reason_lock); return buf_offset; @@ -89,6 +95,25 @@ void log_wakeup_reason(int irq) spin_unlock(&resume_reason_lock); } +void log_suspend_abort_reason(const char *fmt, ...) +{ + va_list args; + + spin_lock(&resume_reason_lock); + + //Suspend abort reason has already been logged. + if (suspend_abort) { + spin_unlock(&resume_reason_lock); + return; + } + + suspend_abort = true; + va_start(args, fmt); + snprintf(abort_reason, MAX_SUSPEND_ABORT_LEN, fmt, args); + va_end(args); + spin_unlock(&resume_reason_lock); +} + /* Detects a suspend and clears all the previous wake up reasons*/ static int wakeup_reason_pm_event(struct notifier_block *notifier, unsigned long pm_event, void *unused) @@ -97,6 +122,7 @@ static int wakeup_reason_pm_event(struct notifier_block *notifier, case PM_SUSPEND_PREPARE: spin_lock(&resume_reason_lock); irqcount = 0; + suspend_abort = false; spin_unlock(&resume_reason_lock); break; default: |