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Commit 8561b10f authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
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[PATCH] USB: move the usb hcd code to use the new class code. 



This moves a kref into the main hcd structure, which detaches it from
the class device structure.

Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 1235686f

drivers/usb/core/hcd.c

+27 −34
Original line number Diff line number Diff line
@@ -653,48 +653,43 @@ static int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) 
/* exported only within usbcore */

struct usb_bus *usb_bus_get(struct usb_bus *bus)

{

	struct class_device *tmp;

	if (bus)

		kref_get(&bus->kref);

	return bus;

}



	if (!bus)

		return NULL;

static void usb_host_release(struct kref *kref)

{

	struct usb_bus *bus = container_of(kref, struct usb_bus, kref);



	tmp = class_device_get(&bus->class_dev);

	if (tmp)        

		return to_usb_bus(tmp);

	else

		return NULL;

	if (bus->release)

		bus->release(bus);

}



/* exported only within usbcore */

void usb_bus_put(struct usb_bus *bus)

{

	if (bus)

		class_device_put(&bus->class_dev);

		kref_put(&bus->kref, usb_host_release);

}



/*-------------------------------------------------------------------------*/



static void usb_host_release(struct class_device *class_dev)

{

	struct usb_bus *bus = to_usb_bus(class_dev);



	if (bus->release)

		bus->release(bus);

}



static struct class usb_host_class = {

	.name		= "usb_host",

	.release	= &usb_host_release,

};

static struct class *usb_host_class;



int usb_host_init(void)

{

	return class_register(&usb_host_class);

	int retval = 0;



	usb_host_class = class_create(THIS_MODULE, "usb_host");

	if (IS_ERR(usb_host_class))

		retval = PTR_ERR(usb_host_class);

	return retval;

}



void usb_host_cleanup(void)

{

	class_unregister(&usb_host_class);

	class_destroy(usb_host_class);

}



/**
@@ -719,8 +714,7 @@ static void usb_bus_init (struct usb_bus *bus) 


	INIT_LIST_HEAD (&bus->bus_list);



	class_device_initialize(&bus->class_dev);

	bus->class_dev.class = &usb_host_class;

	kref_init(&bus->kref);

}



/**
@@ -761,7 +755,6 @@ struct usb_bus *usb_alloc_bus (struct usb_operations *op) 
static int usb_register_bus(struct usb_bus *bus)

{

	int busnum;

	int retval;



	down (&usb_bus_list_lock);

	busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1);
@@ -774,15 +767,15 @@ static int usb_register_bus(struct usb_bus *bus) 
		return -E2BIG;

	}



	snprintf(bus->class_dev.class_id, BUS_ID_SIZE, "usb%d", busnum);

	bus->class_dev.dev = bus->controller;

	retval = class_device_add(&bus->class_dev);

	if (retval) {

	bus->class_dev = class_device_create(usb_host_class, MKDEV(0,0), bus->controller, "usb%d", busnum);

	if (IS_ERR(bus->class_dev)) {

		clear_bit(busnum, busmap.busmap);

		up(&usb_bus_list_lock);

		return retval;

		return PTR_ERR(bus->class_dev);

	}



	class_set_devdata(bus->class_dev, bus);



	/* Add it to the local list of buses */

	list_add (&bus->bus_list, &usb_bus_list);

	up (&usb_bus_list_lock);
@@ -820,7 +813,7 @@ static void usb_deregister_bus (struct usb_bus *bus) 


	clear_bit (bus->busnum, busmap.busmap);



	class_device_del(&bus->class_dev);

	class_device_unregister(bus->class_dev);

}



/**

drivers/usb/host/ehci-dbg.c

+5 −5
Original line number Diff line number Diff line
@@ -450,7 +450,7 @@ show_async (struct class_device *class_dev, char *buf) 


	*buf = 0;



	bus = to_usb_bus(class_dev);

	bus = class_get_devdata(class_dev);

	hcd = bus->hcpriv;

	ehci = hcd_to_ehci (hcd);

	next = buf;
@@ -496,7 +496,7 @@ show_periodic (struct class_device *class_dev, char *buf) 
		return 0;

	seen_count = 0;



	bus = to_usb_bus(class_dev);

	bus = class_get_devdata(class_dev);

	hcd = bus->hcpriv;

	ehci = hcd_to_ehci (hcd);

	next = buf;
@@ -633,7 +633,7 @@ show_registers (struct class_device *class_dev, char *buf) 
	static char		fmt [] = "%*s\n";

	static char		label [] = "";



	bus = to_usb_bus(class_dev);

	bus = class_get_devdata(class_dev);

	hcd = bus->hcpriv;

	ehci = hcd_to_ehci (hcd);

	next = buf;
@@ -735,7 +735,7 @@ static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL); 


static inline void create_debug_files (struct ehci_hcd *ehci)

{

	struct class_device *cldev = &ehci_to_hcd(ehci)->self.class_dev;

	struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;



	class_device_create_file(cldev, &class_device_attr_async);

	class_device_create_file(cldev, &class_device_attr_periodic);
@@ -744,7 +744,7 @@ static inline void create_debug_files (struct ehci_hcd *ehci) 


static inline void remove_debug_files (struct ehci_hcd *ehci)

{

	struct class_device *cldev = &ehci_to_hcd(ehci)->self.class_dev;

	struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;



	class_device_remove_file(cldev, &class_device_attr_async);

	class_device_remove_file(cldev, &class_device_attr_periodic);

drivers/usb/host/ohci-dbg.c

+5 −5
Original line number Diff line number Diff line
@@ -481,7 +481,7 @@ show_async (struct class_device *class_dev, char *buf) 
	size_t			temp;

	unsigned long		flags;



	bus = to_usb_bus(class_dev);

	bus = class_get_devdata(class_dev);

	hcd = bus->hcpriv;

	ohci = hcd_to_ohci(hcd);
@@ -514,7 +514,7 @@ show_periodic (struct class_device *class_dev, char *buf) 
		return 0;

	seen_count = 0;



	bus = to_usb_bus(class_dev);

	bus = class_get_devdata(class_dev);

	hcd = bus->hcpriv;

	ohci = hcd_to_ohci(hcd);

	next = buf;
@@ -611,7 +611,7 @@ show_registers (struct class_device *class_dev, char *buf) 
	char			*next;

	u32			rdata;



	bus = to_usb_bus(class_dev);

	bus = class_get_devdata(class_dev);

	hcd = bus->hcpriv;

	ohci = hcd_to_ohci(hcd);

	regs = ohci->regs;
@@ -684,7 +684,7 @@ static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL); 


static inline void create_debug_files (struct ohci_hcd *ohci)

{

	struct class_device *cldev = &ohci_to_hcd(ohci)->self.class_dev;

	struct class_device *cldev = ohci_to_hcd(ohci)->self.class_dev;



	class_device_create_file(cldev, &class_device_attr_async);

	class_device_create_file(cldev, &class_device_attr_periodic);
@@ -694,7 +694,7 @@ static inline void create_debug_files (struct ohci_hcd *ohci) 


static inline void remove_debug_files (struct ohci_hcd *ohci)

{

	struct class_device *cldev = &ohci_to_hcd(ohci)->self.class_dev;

	struct class_device *cldev = ohci_to_hcd(ohci)->self.class_dev;



	class_device_remove_file(cldev, &class_device_attr_async);

	class_device_remove_file(cldev, &class_device_attr_periodic);

include/linux/usb.h

+2 −3
Original line number Diff line number Diff line
@@ -287,15 +287,14 @@ struct usb_bus { 


	struct dentry *usbfs_dentry;	/* usbfs dentry entry for the bus */



	struct class_device class_dev;	/* class device for this bus */

	struct class_device *class_dev;	/* class device for this bus */

	struct kref kref;		/* handles reference counting this bus */

	void (*release)(struct usb_bus *bus);	/* function to destroy this bus's memory */

#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)

	struct mon_bus *mon_bus;	/* non-null when associated */

	int monitored;			/* non-zero when monitored */

#endif

};

#define	to_usb_bus(d) container_of(d, struct usb_bus, class_dev)





/* -------------------------------------------------------------------------- */