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soc: qcom: watchdog_v2: Change completion to wait_queue

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Prepare for future changes which will require waiting on several
conditions prior to petting the watchdog.

Change-Id: I1a62b6ec73e7cd581a535316029956ea7ce23ba0
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
This commit is contained in:
Patrick Daly 2016-04-08 18:38:39 -07:00 • committed by Kyle Yan
parent 7c71a4d3c7
commit cf5a632479
1 changed files with 12 additions and 7 deletions
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19
drivers/soc/qcom/watchdog_v2.c
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@ -1,4 +1,4 @@
/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -26,6 +26,7 @@
#include <linux/cpu.h>
#include <linux/cpu_pm.h>
#include <linux/platform_device.h>
#include <linux/wait.h>
#include <soc/qcom/scm.h>
#include <soc/qcom/memory_dump.h>
#include <soc/qcom/watchdog.h>
@ -77,7 +78,8 @@ struct msm_watchdog_data {
bool enabled;
struct task_struct *watchdog_task;
struct timer_list pet_timer;
struct completion pet_complete;
wait_queue_head_t pet_complete;
bool timer_expired;
};
/*
@ -298,7 +300,8 @@ static void pet_task_wakeup(unsigned long data)
{
struct msm_watchdog_data *wdog_dd =
(struct msm_watchdog_data *)data;
complete(&wdog_dd->pet_complete);
wdog_dd->timer_expired = true;
wake_up(&wdog_dd->pet_complete);
}
static __ref int watchdog_kthread(void *arg)
@ -310,10 +313,11 @@ static __ref int watchdog_kthread(void *arg)
sched_setscheduler(current, SCHED_FIFO, &param);
while (!kthread_should_stop()) {
while (wait_for_completion_interruptible(
&wdog_dd->pet_complete) != 0)
while (wait_event_interruptible(
wdog_dd->pet_complete,
wdog_dd->timer_expired) != 0)
;
reinit_completion(&wdog_dd->pet_complete);
wdog_dd->timer_expired = false;
if (enable) {
delay_time = msecs_to_jiffies(wdog_dd->pet_time);
if (wdog_dd->do_ipi_ping)
@ -561,7 +565,8 @@ static void init_watchdog_data(struct msm_watchdog_data *wdog_dd)
atomic_notifier_chain_register(&panic_notifier_list,
&wdog_dd->panic_blk);
mutex_init(&wdog_dd->disable_lock);
init_completion(&wdog_dd->pet_complete);
init_waitqueue_head(&wdog_dd->pet_complete);
wdog_dd->timer_expired = false;
wake_up_process(wdog_dd->watchdog_task);
init_timer(&wdog_dd->pet_timer);
wdog_dd->pet_timer.data = (unsigned long)wdog_dd;