[Xen-devel] [PATCH 7 of 7] Add unsuspend hook for resuming devices in the checkpoint parent

[Brendan Cully <brendan@xxxxxxxxx>]

# HG changeset patch
# User Brendan Cully <brendan@xxxxxxxxx>
# Date 1168891374 28800
# Node ID 70508fff24c52b7b16ea6c7be630a43cca45a5e1
# Parent  1a3b78919a43a68948775eb4077f5dab62054f7c
Add unsuspend hook for resuming devices in the checkpoint parent.

Nothing uses it at the moment.

Signed-off-by: Brendan Cully <brendan@xxxxxxxxx>

diff -r 1a3b78919a43 -r 70508fff24c5 
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c    Mon Jan 15 
12:02:54 2007 -0800
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c    Mon Jan 15 
12:02:54 2007 -0800
@@ -672,6 +672,26 @@ static int suspend_dev(struct device *de
        return 0;
 }
 
+static int unsuspend_dev(struct device *dev, void *data)
+{
+       int err = 0;
+       struct xenbus_driver *drv;
+       struct xenbus_device *xdev;
+
+       DPRINTK("");
+
+       if (dev->driver == NULL)
+               return 0;
+       drv = to_xenbus_driver(dev->driver);
+       xdev = container_of(dev, struct xenbus_device, dev);
+       if (drv->unsuspend)
+               err = drv->unsuspend(xdev);
+       if (err)
+               printk(KERN_WARNING
+                      "xenbus: unsuspend %s failed: %i\n", dev->bus_id, err);
+       return 0;
+}
+
 static int resume_dev(struct device *dev, void *data)
 {
        int err;
@@ -735,6 +755,9 @@ void xenbus_resume(int reconnect)
 
        if (reconnect) {
                bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL, resume_dev);
+       } else {
+               bus_for_each_dev(&xenbus_frontend.bus, NULL, NULL,
+                                unsuspend_dev);
        }
        xenbus_backend_resume(resume_dev);
 }
diff -r 1a3b78919a43 -r 70508fff24c5 linux-2.6-xen-sparse/include/xen/xenbus.h
--- a/linux-2.6-xen-sparse/include/xen/xenbus.h Mon Jan 15 12:02:54 2007 -0800
+++ b/linux-2.6-xen-sparse/include/xen/xenbus.h Mon Jan 15 12:02:54 2007 -0800
@@ -101,6 +101,7 @@ struct xenbus_driver {
                                 enum xenbus_state backend_state);
        int (*remove)(struct xenbus_device *dev);
        int (*suspend)(struct xenbus_device *dev);
+       int (*unsuspend)(struct xenbus_device *dev);
        int (*resume)(struct xenbus_device *dev);
        int (*uevent)(struct xenbus_device *, char **, int, char *, int);
        struct device_driver driver;

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