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xen: xenbus PM events support

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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>
This commit is contained in:
Kazuhiro SUZUKI
2011-02-18 14:43:07 -08:00
committed by Konrad Rzeszutek Wilk
parent 76ca078328
commit c7853aea57
4 changed files with 20 additions and 6 deletions
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12
drivers/xen/xenbus/xenbus_probe.c
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@@ -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;