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xen: use device model for suspending xenbus devices

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Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Ian Campbell 2009-02-09 12:05:50 -08:00 committed by Jeremy Fitzhardinge
parent a1ce1be578
commit de5b31bd47
4 changed files with 16 additions and 34 deletions
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9
drivers/xen/manage.c
View file

@ -104,9 +104,8 @@ static void do_suspend(void)
goto out;
}
printk("suspending xenbus...\n");
/* XXX use normal device tree? */
xenbus_suspend();
printk(KERN_DEBUG "suspending xenstore...\n");
xs_suspend();
err = stop_machine(xen_suspend, &cancelled, cpumask_of(0));
if (err) {
@ -116,9 +115,9 @@ static void do_suspend(void)
if (!cancelled) {
xen_arch_resume();
xenbus_resume();
xs_resume();
} else
xenbus_suspend_cancel();
xs_suspend_cancel();
device_resume(PMSG_RESUME);

37
drivers/xen/xenbus/xenbus_probe.c
View file

@ -71,6 +71,9 @@ static int xenbus_probe_frontend(const char *type, const char *name);
static void xenbus_dev_shutdown(struct device *_dev);
static int xenbus_dev_suspend(struct device *dev, pm_message_t state);
static int xenbus_dev_resume(struct device *dev);
/* If something in array of ids matches this device, return it. */
static const struct xenbus_device_id *
match_device(const struct xenbus_device_id *arr, struct xenbus_device *dev)
@ -188,6 +191,9 @@ static struct xen_bus_type xenbus_frontend = {
.remove = xenbus_dev_remove,
.shutdown = xenbus_dev_shutdown,
.dev_attrs = xenbus_dev_attrs,
.suspend = xenbus_dev_suspend,
.resume = xenbus_dev_resume,
},
};
@ -669,7 +675,7 @@ static struct xenbus_watch fe_watch = {
.callback = frontend_changed,
};
static int suspend_dev(struct device *dev, void *data)
static int xenbus_dev_suspend(struct device *dev, pm_message_t state)
{
int err = 0;
struct xenbus_driver *drv;
@ -682,14 +688,14 @@ static int suspend_dev(struct device *dev, void *data)
drv = to_xenbus_driver(dev->driver);
xdev = container_of(dev, struct xenbus_device, dev);
if (drv->suspend)
err = drv->suspend(xdev);
err = drv->suspend(xdev, state);
if (err)
printk(KERN_WARNING
"xenbus: suspend %s failed: %i\n", dev_name(dev), err);
return 0;
}
static int resume_dev(struct device *dev, void *data)
static int xenbus_dev_resume(struct device *dev)
{
int err;
struct xenbus_driver *drv;
@ -734,31 +740,6 @@ static int resume_dev(struct device *dev, void *data)
return 0;
}
void xenbus_suspend(void)
{
DPRINTK("");
bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, suspend_dev);
xenbus_backend_suspend(suspend_dev);
xs_suspend();
}
EXPORT_SYMBOL_GPL(xenbus_suspend);
void xenbus_resume(void)
{
xb_init_comms();
xs_resume();
bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, resume_dev);
xenbus_backend_resume(resume_dev);
}
EXPORT_SYMBOL_GPL(xenbus_resume);
void xenbus_suspend_cancel(void)
{
xs_suspend_cancel();
}
EXPORT_SYMBOL_GPL(xenbus_suspend_cancel);
/* A flag to determine if xenstored is 'ready' (i.e. has started) */
int xenstored_ready = 0;

2
drivers/xen/xenbus/xenbus_xs.c
View file

@ -673,6 +673,8 @@ void xs_resume(void)
struct xenbus_watch *watch;
char token[sizeof(watch) * 2 + 1];
xb_init_comms();
mutex_unlock(&xs_state.response_mutex);
mutex_unlock(&xs_state.request_mutex);
up_write(&xs_state.transaction_mutex);

2
include/xen/xenbus.h
View file

@ -91,7 +91,7 @@ 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);
int (*suspend)(struct xenbus_device *dev, pm_message_t state);
int (*resume)(struct xenbus_device *dev);
int (*uevent)(struct xenbus_device *, char **, int, char *, int);
struct device_driver driver;