68 struct usb_hcd {  struct
73 	struct usb_bus		self;		/* hcd is-a bus */
74 	struct kref		kref;		/* reference counter */
76 	const char		*product_desc;	/* product/vendor string */
77 	int			speed;		/* Speed for this roothub.
81 	char			irq_descr[24];	/* driver + bus # */
83 	struct timer_list	rh_timer;	/* drives root-hub polling */
84 	struct urb		*status_urb;	/* the current status urb */
86 	struct work_struct	wakeup_work;	/* for remote wakeup */
88 	struct work_struct	died_work;	/* for when the device dies */
93 	const struct hc_driver	*driver;	/* hw-specific hooks */
99 	struct usb_phy		*usb_phy;
100 	struct usb_phy_roothub	*phy_roothub;
106 	unsigned long		flags;
140 	enum usb_dev_authorize_policy dev_policy;
143 	unsigned		rh_registered:1;/* is root hub registered? */
144 	unsigned		rh_pollable:1;	/* may we poll the root hub? */
145 	unsigned		msix_enabled:1;	/* driver has MSI-X enabled? */
146 	unsigned		msi_enabled:1;	/* driver has MSI enabled? */
152 	unsigned		skip_phy_initialization:1;
156 	unsigned		uses_new_polling:1;
157 	unsigned		has_tt:1;	/* Integrated TT in root hub */
158 	unsigned		amd_resume_bug:1; /* AMD remote wakeup quirk */
159 	unsigned		can_do_streams:1; /* HC supports streams */
160 	unsigned		tpl_support:1; /* OTG & EH TPL support */
161 	unsigned		cant_recv_wakeups:1;
186 	struct usb_hcd		*shared_hcd;  argument
187 	struct usb_hcd		*primary_hcd;  argument
191 	struct dma_pool		*pool[HCD_BUFFER_POOLS];
193 	int			state;
224 static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)  in hcd_to_bus()  argument