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usb: move struct usb_device->children to struct usb_hub_port->child

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Move child's pointer to the struct usb_hub_port since the child device
is directly associated with the port. Provide usb_get_hub_child_device()
to get child's pointer.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lan Tianyu 2012-05-11 16:08:30 +08:00 • committed by Greg Kroah-Hartman
commit bebc56d58d
5 changed files with 47 additions and 33 deletions
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4
include/linux/usb.h
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@ -424,7 +424,6 @@ enum usb_device_removable {
* access from userspace
* @usbfs_dentry: usbfs dentry entry for the device
* @maxchild: number of ports if hub
* @children: child devices - USB devices that are attached to this hub
* @quirks: quirks of the whole device
* @urbnum: number of URBs submitted for the whole device
* @active_duration: total time device is not suspended
@ -491,7 +490,6 @@ struct usb_device {
struct list_head filelist;
int maxchild;
struct usb_device **children;
u32 quirks;
atomic_t urbnum;
@ -517,6 +515,8 @@ static inline struct usb_device *interface_to_usbdev(struct usb_interface *intf)
extern struct usb_device *usb_get_dev(struct usb_device *dev);
extern void usb_put_dev(struct usb_device *dev);
extern struct usb_device *usb_get_hub_child_device(struct usb_device *hdev,
int port1);
/* USB device locking */
#define usb_lock_device(udev) device_lock(&(udev)->dev)