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Commit 0c0382e3 authored by Alan Stern's avatar Alan Stern Committed by Greg Kroah-Hartman
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[PATCH] USB: Rename hcd->hub_suspend to hcd->bus_suspend 



This patch (as580) is perhaps the only result from the long discussion I
had with David about his changes to the root-hub suspend/resume code.  It
renames the hub_suspend and hub_resume methods in struct usb_hcd to
bus_suspend and bus_resume.  These are more descriptive names, since the
methods really do suspend or resume an entire USB bus, and less likely to
be confused with the hub_suspend and hub_resume routines in hub.c.

It also takes David's advice about removing the layer of bus glue, where
those methods are called.  And it implements a related change that David
made to the other HCDs but forgot to put into dummy_hcd.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent bb200f6e

drivers/usb/core/hcd.c

+6 −10
Original line number Diff line number Diff line
@@ -1433,16 +1433,16 @@ hcd_endpoint_disable (struct usb_device *udev, struct usb_host_endpoint *ep) 


#ifdef	CONFIG_PM



static int hcd_hub_suspend (struct usb_bus *bus)

int hcd_bus_suspend (struct usb_bus *bus)

{

	struct usb_hcd		*hcd;

	int			status;



	hcd = container_of (bus, struct usb_hcd, self);

	if (!hcd->driver->hub_suspend)

	if (!hcd->driver->bus_suspend)

		return -ENOENT;

	hcd->state = HC_STATE_QUIESCING;

	status = hcd->driver->hub_suspend (hcd);

	status = hcd->driver->bus_suspend (hcd);

	if (status == 0)

		hcd->state = HC_STATE_SUSPENDED;

	else
@@ -1451,18 +1451,18 @@ static int hcd_hub_suspend (struct usb_bus *bus) 
	return status;

}



static int hcd_hub_resume (struct usb_bus *bus)

int hcd_bus_resume (struct usb_bus *bus)

{

	struct usb_hcd		*hcd;

	int			status;



	hcd = container_of (bus, struct usb_hcd, self);

	if (!hcd->driver->hub_resume)

	if (!hcd->driver->bus_resume)

		return -ENOENT;

	if (hcd->state == HC_STATE_RUNNING)

		return 0;

	hcd->state = HC_STATE_RESUMING;

	status = hcd->driver->hub_resume (hcd);

	status = hcd->driver->bus_resume (hcd);

	if (status == 0)

		hcd->state = HC_STATE_RUNNING;

	else {
@@ -1590,10 +1590,6 @@ static struct usb_operations usb_hcd_operations = { 
	.buffer_alloc =		hcd_buffer_alloc,

	.buffer_free =		hcd_buffer_free,

	.disable =		hcd_endpoint_disable,

#ifdef	CONFIG_PM

	.hub_suspend =		hcd_hub_suspend,

	.hub_resume =		hcd_hub_resume,

#endif

};



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

drivers/usb/core/hcd.h

+17 −6
Original line number Diff line number Diff line
@@ -154,10 +154,6 @@ struct usb_operations { 


	void (*disable)(struct usb_device *udev,

			struct usb_host_endpoint *ep);



	/* global suspend/resume of bus */

	int (*hub_suspend)(struct usb_bus *);

	int (*hub_resume)(struct usb_bus *);

};



/* each driver provides one of these, and hardware init support */
@@ -212,8 +208,8 @@ struct hc_driver { 
	int		(*hub_control) (struct usb_hcd *hcd,

				u16 typeReq, u16 wValue, u16 wIndex,

				char *buf, u16 wLength);

	int		(*hub_suspend)(struct usb_hcd *);

	int		(*hub_resume)(struct usb_hcd *);

	int		(*bus_suspend)(struct usb_hcd *);

	int		(*bus_resume)(struct usb_hcd *);

	int		(*start_port_reset)(struct usb_hcd *, unsigned port_num);

	void		(*hub_irq_enable)(struct usb_hcd *);

		/* Needed only if port-change IRQs are level-triggered */
@@ -379,6 +375,21 @@ extern int usb_find_interface_driver (struct usb_device *dev, 


#define usb_endpoint_out(ep_dir)	(!((ep_dir) & USB_DIR_IN))



#ifdef CONFIG_PM

extern int hcd_bus_suspend (struct usb_bus *bus);

extern int hcd_bus_resume (struct usb_bus *bus);

#else

static inline int hcd_bus_suspend(struct usb_bus *bus)

{

	return 0;

}



static inline int hcd_bus_resume (struct usb_bus *bus)

{

	return 0;

}

#endif /* CONFIG_PM */



/*

 * USB device fs stuff

 */

drivers/usb/core/hub.c

+4 −4
Original line number Diff line number Diff line
@@ -1917,8 +1917,8 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg) 
	/* "global suspend" of the downstream HC-to-USB interface */

	if (!hdev->parent) {

		struct usb_bus	*bus = hdev->bus;

		if (bus && bus->op->hub_suspend) {

			int	status = bus->op->hub_suspend (bus);

		if (bus) {

			int	status = hcd_bus_suspend (bus);



			if (status != 0) {

				dev_dbg(&hdev->dev, "'global' suspend %d\n",
@@ -1943,8 +1943,8 @@ static int hub_resume(struct usb_interface *intf) 
	/* "global resume" of the downstream HC-to-USB interface */

	if (!hdev->parent) {

		struct usb_bus	*bus = hdev->bus;

		if (bus && bus->op->hub_resume) {

			status = bus->op->hub_resume (bus);

		if (bus) {

			status = hcd_bus_resume (bus);

			if (status) {

				dev_dbg(&intf->dev, "'global' resume %d\n",

					status);

drivers/usb/gadget/dummy_hcd.c

+4 −18
Original line number Diff line number Diff line
@@ -1751,7 +1751,7 @@ static int dummy_hub_control ( 
	return retval;

}



static int dummy_hub_suspend (struct usb_hcd *hcd)

static int dummy_bus_suspend (struct usb_hcd *hcd)

{

	struct dummy *dum = hcd_to_dummy (hcd);
@@ -1762,7 +1762,7 @@ static int dummy_hub_suspend (struct usb_hcd *hcd) 
	return 0;

}



static int dummy_hub_resume (struct usb_hcd *hcd)

static int dummy_bus_resume (struct usb_hcd *hcd)

{

	struct dummy *dum = hcd_to_dummy (hcd);
@@ -1894,8 +1894,8 @@ static const struct hc_driver dummy_hcd = { 


	.hub_status_data = 	dummy_hub_status,

	.hub_control = 		dummy_hub_control,

	.hub_suspend =		dummy_hub_suspend,

	.hub_resume =		dummy_hub_resume,

	.bus_suspend =		dummy_bus_suspend,

	.bus_resume =		dummy_bus_resume,

};



static int dummy_hcd_probe (struct device *dev)
@@ -1936,13 +1936,6 @@ static int dummy_hcd_suspend (struct device *dev, pm_message_t state) 
	dev_dbg (dev, "%s\n", __FUNCTION__);

	hcd = dev_get_drvdata (dev);



#ifndef CONFIG_USB_SUSPEND

	/* Otherwise this would never happen */

	usb_lock_device (hcd->self.root_hub);

	dummy_hub_suspend (hcd);

	usb_unlock_device (hcd->self.root_hub);

#endif



	hcd->state = HC_STATE_SUSPENDED;

	return 0;

}
@@ -1955,13 +1948,6 @@ static int dummy_hcd_resume (struct device *dev) 
	hcd = dev_get_drvdata (dev);

	hcd->state = HC_STATE_RUNNING;



#ifndef CONFIG_USB_SUSPEND

	/* Otherwise this would never happen */

	usb_lock_device (hcd->self.root_hub);

	dummy_hub_resume (hcd);

	usb_unlock_device (hcd->self.root_hub);

#endif



	usb_hcd_poll_rh_status (hcd);

	return 0;

}

drivers/usb/host/ehci-hub.c

+4 −4
Original line number Diff line number Diff line
@@ -30,7 +30,7 @@ 


#ifdef	CONFIG_PM



static int ehci_hub_suspend (struct usb_hcd *hcd)

static int ehci_bus_suspend (struct usb_hcd *hcd)

{

	struct ehci_hcd		*ehci = hcd_to_ehci (hcd);

	int			port;
@@ -83,7 +83,7 @@ static int ehci_hub_suspend (struct usb_hcd *hcd) 




/* caller has locked the root hub, and should reset/reinit on error */

static int ehci_hub_resume (struct usb_hcd *hcd)

static int ehci_bus_resume (struct usb_hcd *hcd)

{

	struct ehci_hcd		*ehci = hcd_to_ehci (hcd);

	u32			temp;
@@ -159,8 +159,8 @@ static int ehci_hub_resume (struct usb_hcd *hcd) 


#else



#define ehci_hub_suspend	NULL

#define ehci_hub_resume		NULL

#define ehci_bus_suspend	NULL

#define ehci_bus_resume		NULL



#endif	/* CONFIG_PM */