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Commit 804f1853 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'stable/xen.pm.bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 

* 'stable/xen.pm.bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen: use freeze/restore/thaw PM events for suspend/resume/chkpt
  xen: xenbus PM events support
parents 5a39837f b3e96c0c

drivers/xen/manage.c

+8 −8
Original line number Diff line number Diff line
@@ -61,7 +61,7 @@ static void xen_post_suspend(int cancelled) 
	xen_mm_unpin_all();

}



#ifdef CONFIG_PM_SLEEP

#ifdef CONFIG_HIBERNATION

static int xen_suspend(void *data)

{

	struct suspend_info *si = data;
@@ -69,7 +69,7 @@ static int xen_suspend(void *data) 


	BUG_ON(!irqs_disabled());



	err = sysdev_suspend(PMSG_SUSPEND);

	err = sysdev_suspend(PMSG_FREEZE);

	if (err) {

		printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n",

			err);
@@ -118,7 +118,7 @@ static void do_suspend(void) 
	}

#endif



	err = dpm_suspend_start(PMSG_SUSPEND);

	err = dpm_suspend_start(PMSG_FREEZE);

	if (err) {

		printk(KERN_ERR "xen suspend: dpm_suspend_start %d\n", err);

		goto out_thaw;
@@ -127,7 +127,7 @@ static void do_suspend(void) 
	printk(KERN_DEBUG "suspending xenstore...\n");

	xs_suspend();



	err = dpm_suspend_noirq(PMSG_SUSPEND);

	err = dpm_suspend_noirq(PMSG_FREEZE);

	if (err) {

		printk(KERN_ERR "dpm_suspend_noirq failed: %d\n", err);

		goto out_resume;
@@ -147,7 +147,7 @@ static void do_suspend(void) 


	err = stop_machine(xen_suspend, &si, cpumask_of(0));



	dpm_resume_noirq(PMSG_RESUME);

	dpm_resume_noirq(si.cancelled ? PMSG_THAW : PMSG_RESTORE);



	if (err) {

		printk(KERN_ERR "failed to start xen_suspend: %d\n", err);
@@ -161,7 +161,7 @@ static void do_suspend(void) 
	} else

		xs_suspend_cancel();



	dpm_resume_end(PMSG_RESUME);

	dpm_resume_end(si.cancelled ? PMSG_THAW : PMSG_RESTORE);



	/* Make sure timer events get retriggered on all CPUs */

	clock_was_set();
@@ -173,7 +173,7 @@ static void do_suspend(void) 
#endif

	shutting_down = SHUTDOWN_INVALID;

}

#endif	/* CONFIG_PM_SLEEP */

#endif	/* CONFIG_HIBERNATION */



struct shutdown_handler {

	const char *command;
@@ -202,7 +202,7 @@ static void shutdown_handler(struct xenbus_watch *watch, 
		{ "poweroff",	do_poweroff },

		{ "halt",	do_poweroff },

		{ "reboot",	do_reboot   },

#ifdef CONFIG_PM_SLEEP

#ifdef CONFIG_HIBERNATION

		{ "suspend",	do_suspend  },

#endif

		{NULL, NULL},

drivers/xen/xenbus/xenbus_probe.c

+10 −2
Original line number Diff line number Diff line
@@ -577,7 +577,7 @@ void xenbus_dev_changed(const char *node, struct xen_bus_type *bus) 
}

EXPORT_SYMBOL_GPL(xenbus_dev_changed);



int xenbus_dev_suspend(struct device *dev, pm_message_t state)

int xenbus_dev_suspend(struct device *dev)

{

	int err = 0;

	struct xenbus_driver *drv;
@@ -590,7 +590,7 @@ int xenbus_dev_suspend(struct device *dev, pm_message_t state) 
		return 0;

	drv = to_xenbus_driver(dev->driver);

	if (drv->suspend)

		err = drv->suspend(xdev, state);

		err = drv->suspend(xdev);

	if (err)

		printk(KERN_WARNING

		       "xenbus: suspend %s failed: %i\n", dev_name(dev), err);
@@ -642,6 +642,14 @@ int xenbus_dev_resume(struct device *dev) 
}

EXPORT_SYMBOL_GPL(xenbus_dev_resume);



int xenbus_dev_cancel(struct device *dev)

{

	/* Do nothing */

	DPRINTK("cancel");

	return 0;

}

EXPORT_SYMBOL_GPL(xenbus_dev_cancel);



/* A flag to determine if xenstored is 'ready' (i.e. has started) */

int xenstored_ready = 0;

drivers/xen/xenbus/xenbus_probe.h

+2 −1
Original line number Diff line number Diff line
@@ -64,8 +64,9 @@ extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus); 


extern void xenbus_dev_shutdown(struct device *_dev);



extern int xenbus_dev_suspend(struct device *dev, pm_message_t state);

extern int xenbus_dev_suspend(struct device *dev);

extern int xenbus_dev_resume(struct device *dev);

extern int xenbus_dev_cancel(struct device *dev);



extern void xenbus_otherend_changed(struct xenbus_watch *watch,

				    const char **vec, unsigned int len,

drivers/xen/xenbus/xenbus_probe_frontend.c

+9 −2
Original line number Diff line number Diff line
@@ -85,6 +85,14 @@ static struct device_attribute xenbus_frontend_dev_attrs[] = { 
	__ATTR_NULL

};



static const struct dev_pm_ops xenbus_pm_ops = {

	.suspend	= xenbus_dev_suspend,

	.resume		= xenbus_dev_resume,

	.freeze		= xenbus_dev_suspend,

	.thaw		= xenbus_dev_cancel,

	.restore	= xenbus_dev_resume,

};



static struct xen_bus_type xenbus_frontend = {

	.root = "device",

	.levels = 2,		/* device/type/<id> */
@@ -100,8 +108,7 @@ static struct xen_bus_type xenbus_frontend = { 
		.shutdown	= xenbus_dev_shutdown,

		.dev_attrs	= xenbus_frontend_dev_attrs,



		.suspend	= xenbus_dev_suspend,

		.resume		= xenbus_dev_resume,

		.pm		= &xenbus_pm_ops,

	},

};

include/xen/xenbus.h

+1 −1
Original line number Diff line number Diff line
@@ -92,7 +92,7 @@ struct xenbus_driver { 
	void (*otherend_changed)(struct xenbus_device *dev,

				 enum xenbus_state backend_state);

	int (*remove)(struct xenbus_device *dev);

	int (*suspend)(struct xenbus_device *dev, pm_message_t state);

	int (*suspend)(struct xenbus_device *dev);

	int (*resume)(struct xenbus_device *dev);

	int (*uevent)(struct xenbus_device *, struct kobj_uevent_env *);

	struct device_driver driver;