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| author | Kazuhiro SUZUKI <kaz@jp.fujitsu.com> | 2011-02-18 14:43:07 -0800 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-03-16 13:06:29 -0400 |
| commit | c7853aea57d8e850b0979e7bdcbcabdcbbdd9e37 (patch) | |
| tree | 2cfd0f35cdd1a115e672f78653b34fdced4bd251 | |
| parent | 76ca07832842100b14a31ad8996dab7b0c28aa42 (diff) | |
| download | kernel_samsung_smdk4412-c7853aea57d8e850b0979e7bdcbcabdcbbdd9e37.zip kernel_samsung_smdk4412-c7853aea57d8e850b0979e7bdcbcabdcbbdd9e37.tar.gz kernel_samsung_smdk4412-c7853aea57d8e850b0979e7bdcbcabdcbbdd9e37.tar.bz2 | |
xen: xenbus PM events support
Make xenbus frontend device subscribe to PM events
to receive suspend/resume/freeze/thaw/restore
notifications.
Signed-off-by: Kenji Wakamiya <wkenji@jp.fujitsu.com>
Signed-off-by: Kazuhiro Suzuki <kaz@jp.fujitsu.com>
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
[shriram--minor mods and improved commit message]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| -rw-r--r-- | drivers/xen/xenbus/xenbus_probe.c | 12 | ||||
| -rw-r--r-- | drivers/xen/xenbus/xenbus_probe.h | 3 | ||||
| -rw-r--r-- | drivers/xen/xenbus/xenbus_probe_frontend.c | 9 | ||||
| -rw-r--r-- | include/xen/xenbus.h | 2 |
4 files changed, 20 insertions, 6 deletions
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index baa65e7..7397695 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -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; diff --git a/drivers/xen/xenbus/xenbus_probe.h b/drivers/xen/xenbus/xenbus_probe.h index 2466581..888b990 100644 --- a/drivers/xen/xenbus/xenbus_probe.h +++ b/drivers/xen/xenbus/xenbus_probe.h @@ -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, diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c index 5bcc2d6..ea83999 100644 --- a/drivers/xen/xenbus/xenbus_probe_frontend.c +++ b/drivers/xen/xenbus/xenbus_probe_frontend.c @@ -85,6 +85,12 @@ 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, + .thaw = xenbus_dev_cancel, +}; + static struct xen_bus_type xenbus_frontend = { .root = "device", .levels = 2, /* device/type/<id> */ @@ -100,8 +106,7 @@ 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, }, }; diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h index 7a1d15f..5467369 100644 --- a/include/xen/xenbus.h +++ b/include/xen/xenbus.h @@ -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; |