Merge 5504ce0317 ("Merge tag 'pm-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/rafael/linux-pm") into android-mainline

Steps on the way to v7.2-rc1

Change-Id: Ic13e31db0176105e2b36af2d855d44bcb05fc948
Signed-off-by: Carlos Llamas <cmllamas@google.com>

drivers/base/power/main.c

@@ -28,6 +28,7 @@
 #include <linux/interrupt.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
+#include <linux/sysctl.h>
 #include <linux/async.h>
 #include <linux/suspend.h>
 #include <trace/events/power.h>
@@ -117,7 +118,7 @@ void device_pm_sleep_init(struct device *dev)
 	dev->power.is_noirq_suspended = false;
 	dev->power.is_late_suspended = false;
 	init_completion(&dev->power.completion);
-	complete_all(&dev->power.completion);
+	complete(&dev->power.completion);
 	dev->power.wakeup = NULL;
 	INIT_LIST_HEAD(&dev->power.entry);
 }
@@ -254,6 +255,10 @@ static void dpm_wait(struct device *dev, bool async)
 	if (!dev)
 		return;
 
+	/* Devices with no PM support don't use the completion. */
+	if (dev->power.no_pm)
+		return;
+
 	if (async || (pm_async_enabled && dev->power.async_suspend))
 		wait_for_completion(&dev->power.completion);
 }
@@ -529,6 +534,58 @@ module_param(dpm_watchdog_all_cpu_backtrace, bool, 0644);
 MODULE_PARM_DESC(dpm_watchdog_all_cpu_backtrace,
 		 "Backtrace all CPUs on DPM watchdog timeout");
 
+static unsigned int __read_mostly dpm_watchdog_timeout = CONFIG_DPM_WATCHDOG_TIMEOUT;
+static unsigned int __read_mostly dpm_watchdog_warning_timeout =
+						CONFIG_DPM_WATCHDOG_WARNING_TIMEOUT;
+static const unsigned int dpm_watchdog_timeout_max = CONFIG_DPM_WATCHDOG_TIMEOUT;
+
+static int proc_dodpm_watchdog_timeout_secs(const struct ctl_table *table,
+					    int write, void *buffer,
+					    size_t *lenp, loff_t *ppos)
+{
+	struct ctl_table ctl = *table;
+	unsigned int val = dpm_watchdog_timeout;
+	int ret;
+
+	ctl.data = &val;
+	ret = proc_douintvec_minmax(&ctl, write, buffer, lenp, ppos);
+	if (ret || !write)
+		return ret;
+
+	if (val < dpm_watchdog_warning_timeout)
+		dpm_watchdog_warning_timeout = val;
+	dpm_watchdog_timeout = val;
+
+	return 0;
+}
+
+static const struct ctl_table dpm_watchdog_sysctls[] = {
+	{
+		.procname	= "dpm_watchdog_timeout_secs",
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_dodpm_watchdog_timeout_secs,
+		.extra1		= SYSCTL_ONE,
+		.extra2		= (void *)&dpm_watchdog_timeout_max,
+	},
+	{
+		.procname	= "dpm_watchdog_warning_timeout_secs",
+		.data		= &dpm_watchdog_warning_timeout,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= proc_douintvec_minmax,
+		.extra1		= SYSCTL_ONE,
+		.extra2		= (void *)&dpm_watchdog_timeout,
+	},
+};
+
+static int __init dpm_watchdog_sysctl_init(void)
+{
+	register_sysctl_init("kernel", dpm_watchdog_sysctls);
+	return 0;
+}
+subsys_initcall(dpm_watchdog_sysctl_init);
+
 /**
  * dpm_watchdog_handler - Driver suspend / resume watchdog handler.
  * @t: The timer that PM watchdog depends on.
@@ -554,9 +611,9 @@ static void dpm_watchdog_handler(struct timer_list *t)
 			dev_driver_string(wd->dev), dev_name(wd->dev));
 	}
 
-	time_left = CONFIG_DPM_WATCHDOG_TIMEOUT - CONFIG_DPM_WATCHDOG_WARNING_TIMEOUT;
+	time_left = dpm_watchdog_timeout - dpm_watchdog_warning_timeout;
 	dev_warn(wd->dev, "**** DPM device timeout after %u seconds; %u seconds until panic ****\n",
-		 CONFIG_DPM_WATCHDOG_WARNING_TIMEOUT, time_left);
+		 dpm_watchdog_warning_timeout, time_left);
 	show_stack(wd->tsk, NULL, KERN_WARNING);
 
 	wd->fatal = true;
@@ -574,11 +631,11 @@ static void dpm_watchdog_set(struct dpm_watchdog *wd, struct device *dev)
 
 	wd->dev = dev;
 	wd->tsk = current;
-	wd->fatal = CONFIG_DPM_WATCHDOG_TIMEOUT == CONFIG_DPM_WATCHDOG_WARNING_TIMEOUT;
+	wd->fatal = dpm_watchdog_timeout == dpm_watchdog_warning_timeout;
 
 	timer_setup_on_stack(timer, dpm_watchdog_handler, 0);
 	/* use same timeout value for both suspend and resume */
-	timer->expires = jiffies + HZ * CONFIG_DPM_WATCHDOG_WARNING_TIMEOUT;
+	timer->expires = jiffies + HZ * dpm_watchdog_warning_timeout;
 	add_timer(timer);
 }