int xenbus_dev_probe(struct device *_dev)
{
struct xenbus_device *dev = to_xenbus_device(_dev);
struct xenbus_driver *drv = to_xenbus_driver(_dev->driver);
const struct xenbus_device_id *id;
int err;
DPRINTK("%s", dev->nodename);
if (!drv->probe) {
err = -ENODEV;
goto fail;
}
id = match_device(drv->ids, dev);
if (!id) {
err = -ENODEV;
goto fail;
}
err = talk_to_otherend(dev);
if (err) {
dev_warn(&dev->dev,
"xenbus_probe: talk_to_otherend on %s failed.\n",
dev->nodename);
return err;
}
err = drv->probe(dev, id);
if (err)
goto fail;
err = watch_otherend(dev);
if (err) {
dev_warn(&dev->dev,
"xenbus_probe: watch_otherend on %s failed.\n",
dev->nodename);
return err;
}
return 0;
fail:
xenbus_dev_error(dev, err, "xenbus_dev_probe on %s", dev->nodename);
xenbus_switch_state(dev, XenbusStateClosed);
#if defined(CONFIG_XEN) || defined(MODULE)
return -ENODEV;
#else
return err;
#endif
}
static int xenbus_dev_probe(struct device *_dev)
{
struct xenbus_device *dev = to_xenbus_device(_dev);
struct xenbus_driver *drv = to_xenbus_driver(_dev->driver);
const struct xenbus_device_id *id;
int err;
DPRINTK("%s", dev->nodename);
if (!drv->probe) {
err = -ENODEV;
goto fail;
}
id = match_device(drv->ids, dev);
if (!id) {
err = -ENODEV;
goto fail;
}
err = talk_to_otherend(dev);
if (err) {
printk(KERN_WARNING
"xenbus_probe: talk_to_otherend on %s failed.\n",
dev->nodename);
return err;
}
err = drv->probe(dev, id);
if (err)
goto fail;
err = watch_otherend(dev);
if (err) {
printk(KERN_WARNING
"xenbus_probe: watch_otherend on %s failed.\n",
dev->nodename);
return err;
}
return 0;
fail:
xenbus_dev_error(dev, err, "xenbus_dev_probe on %s", dev->nodename);
xenbus_switch_state(dev, XenbusStateClosed);
return -ENODEV;
}
static int resume_dev(struct device *dev, void *data)
{
int err;
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);
err = talk_to_otherend(xdev);
if (err) {
printk(KERN_WARNING
"xenbus: resume (talk_to_otherend) %s failed: %i\n",
dev_name(dev), err);
return err;
}
xdev->state = XenbusStateInitialising;
if (drv->resume) {
err = drv->resume(xdev);
if (err) {
printk(KERN_WARNING
"xenbus: resume %s failed: %i\n",
dev_name(dev), err);
return err;
}
}
err = watch_otherend(xdev);
if (err) {
printk(KERN_WARNING
"xenbus_probe: resume (watch_otherend) %s failed: "
"%d.\n", dev_name(dev), err);
return err;
}
return 0;
}
int xenbus_dev_resume(struct device *dev)
#endif
{
int err;
struct xenbus_driver *drv;
struct xenbus_device *xdev
= container_of(dev, struct xenbus_device, dev);
DPRINTK("%s", xdev->nodename);
if (dev->driver == NULL)
return 0;
drv = to_xenbus_driver(dev->driver);
err = talk_to_otherend(xdev);
if (err) {
pr_warning("xenbus: resume (talk_to_otherend) %s failed: %i\n",
dev_name(dev), err);
return err;
}
xdev->state = XenbusStateInitialising;
if (drv->resume) {
err = drv->resume(xdev);
if (err) {
pr_warning("xenbus: resume %s failed: %i\n",
dev_name(dev), err);
return err;
}
}
err = watch_otherend(xdev);
if (err) {
pr_warning("xenbus_probe: resume (watch_otherend) %s failed:"
" %d\n", dev_name(dev), err);
return err;
}
return 0;
}