#include <linux/resume-trace.h>
#include <linux/rwsem.h>
#include <linux/interrupt.h>
+#include <linux/timer.h>
#include "../base.h"
#include "power.h"
static DEFINE_MUTEX(dpm_list_mtx);
+static void dpm_drv_timeout(unsigned long data);
+static DEFINE_TIMER(dpm_drv_wd, dpm_drv_timeout, 0, 0);
+
/*
* Set once the preparation of devices for a PM transition has started, reset
* before starting to resume devices. Protected by dpm_list_mtx.
return error;
}
+/**
+ * dpm_drv_timeout - Driver suspend / resume watchdog handler
+ * @data: struct device which timed out
+ *
+ * Called when a driver has timed out suspending or resuming.
+ * There's not much we can do here to recover so
+ * BUG() out for a crash-dump
+ *
+ */
+static void dpm_drv_timeout(unsigned long data)
+{
+ struct device *dev = (struct device *) data;
+
+ printk(KERN_EMERG "**** DPM device timeout: %s (%s)\n", dev_name(dev),
+ (dev->driver ? dev->driver->name : "no driver"));
+ BUG();
+}
+
+/**
+ * dpm_drv_wdset - Sets up driver suspend/resume watchdog timer.
+ * @dev: struct device which we're guarding.
+ *
+ */
+static void dpm_drv_wdset(struct device *dev)
+{
+ dpm_drv_wd.data = (unsigned long) dev;
+ mod_timer(&dpm_drv_wd, jiffies + (HZ * 3));
+}
+
+/**
+ * dpm_drv_wdclr - clears driver suspend/resume watchdog timer.
+ * @dev: struct device which we're no longer guarding.
+ *
+ */
+static void dpm_drv_wdclr(struct device *dev)
+{
+ del_timer_sync(&dpm_drv_wd);
+}
+
/**
* dpm_resume - Execute "resume" callbacks for non-sysdev devices.
* @state: PM transition of the system being carried out.
get_device(dev);
mutex_unlock(&dpm_list_mtx);
+ dpm_drv_wdset(dev);
error = device_suspend(dev, state);
+ dpm_drv_wdclr(dev);
mutex_lock(&dpm_list_mtx);
if (error) {