}
#ifdef CONFIG_HOTPLUG
-
-/*
- * This sends an uevent to userspace, typically helping to load driver
- * or other modules, configure the device, and more. Drivers can provide
- * a MODULE_DEVICE_TABLE to help with module loading subtasks.
- *
- * We're called either from khubd (the typical case) or from root hub
- * (init, kapmd, modprobe, rmmod, etc), but the agents need to handle
- * delays in event delivery. Use sysfs (and DEVPATH) to make sure the
- * device (and this configuration!) are still present.
- */
static int usb_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
{
- struct usb_interface *intf;
struct usb_device *usb_dev;
- struct usb_host_interface *alt;
int i = 0;
int length = 0;
/* driver is often null here; dev_dbg() would oops */
pr_debug ("usb %s: uevent\n", dev->bus_id);
- if (is_usb_device(dev)) {
+ if (is_usb_device(dev))
usb_dev = to_usb_device(dev);
- alt = NULL;
- } else {
- intf = to_usb_interface(dev);
+ else {
+ struct usb_interface *intf = to_usb_interface(dev);
usb_dev = interface_to_usbdev(intf);
- alt = intf->cur_altsetting;
}
if (usb_dev->devnum < 0) {
#ifdef CONFIG_USB_DEVICEFS
/* If this is available, userspace programs can directly read
* all the device descriptors we don't tell them about. Or
- * even act as usermode drivers.
- *
- * FIXME reduce hardwired intelligence here
+ * act as usermode drivers.
*/
if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
usb_dev->descriptor.bDeviceProtocol))
return -ENOMEM;
- if (!is_usb_device(dev)) {
-
- if (add_uevent_var(envp, num_envp, &i,
+ if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
- "INTERFACE=%d/%d/%d",
- alt->desc.bInterfaceClass,
- alt->desc.bInterfaceSubClass,
- alt->desc.bInterfaceProtocol))
- return -ENOMEM;
+ "BUSNUM=%03d",
+ usb_dev->bus->busnum))
+ return -ENOMEM;
- if (add_uevent_var(envp, num_envp, &i,
+ if (add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
- "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
- le16_to_cpu(usb_dev->descriptor.idVendor),
- le16_to_cpu(usb_dev->descriptor.idProduct),
- le16_to_cpu(usb_dev->descriptor.bcdDevice),
- usb_dev->descriptor.bDeviceClass,
- usb_dev->descriptor.bDeviceSubClass,
- usb_dev->descriptor.bDeviceProtocol,
- alt->desc.bInterfaceClass,
- alt->desc.bInterfaceSubClass,
- alt->desc.bInterfaceProtocol))
- return -ENOMEM;
- }
+ "DEVNUM=%03d",
+ usb_dev->devnum))
+ return -ENOMEM;
envp[i] = NULL;
-
return 0;
}
#else
static int usb_uevent(struct device *dev, char **envp,
- int num_envp, char *buffer, int buffer_size)
+ int num_envp, char *buffer, int buffer_size)
{
return -ENODEV;
}
-
#endif /* CONFIG_HOTPLUG */
/**
done:
// dev_dbg(&udev->dev, "%s: status %d\n", __FUNCTION__, status);
- if (status == 0)
+ if (status == 0) {
+ udev->autoresume_disabled = 0;
udev->dev.power.power_state.event = PM_EVENT_ON;
+ }
return status;
}
udev->do_remote_wakeup = device_may_wakeup(&udev->dev);
if (udev->pm_usage_cnt > 0)
return -EBUSY;
- if (udev->autosuspend_delay < 0)
+ if (udev->autosuspend_delay < 0 || udev->autosuspend_disabled)
return -EPERM;
if (udev->actconfig) {
struct usb_interface *intf;
struct usb_device *parent = udev->parent;
+ if (udev->auto_pm && udev->autoresume_disabled)
+ return -EPERM;
cancel_delayed_work(&udev->autosuspend);
if (udev->state == USB_STATE_NOTATTACHED)
return -ENODEV;
static int usb_resume(struct device *dev)
{
+ struct usb_device *udev;
+
if (!is_usb_device(dev)) /* Ignore PM for interfaces */
return 0;
- return usb_external_resume_device(to_usb_device(dev));
+ udev = to_usb_device(dev);
+ if (udev->autoresume_disabled)
+ return -EPERM;
+ return usb_external_resume_device(udev);
}
#else