USB: EHCI: miscellaneous cleanups for the library conversion

This patch (as1630) cleans up a few minor items resulting from the
split-up of the ehci-hcd driver:

	Remove the product_desc string from the ehci_driver_overrides
	structure.  All drivers will use the generic "EHCI Host
	Controller" string.  (This was requested by Felipe Balbi.)

	Allow drivers to pass a NULL pointer to ehci_init_driver()
	if they don't have to override any settings.

	Remove a #define symbol that is no longer used from the
	ChipIdea host driver.

	Rename overrides to pci_overrides in ehci-pci.c, for
	consistency with ehci-platform.c.

	Mark the *_overrides structures as __initdata.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/host.c

@@ -25,17 +25,12 @@
 #include <linux/usb/hcd.h>
 #include <linux/usb/chipidea.h>
 
-#define CHIPIDEA_EHCI
 #include "../host/ehci.h"
 
 #include "ci.h"
 #include "bits.h"
 #include "host.h"
 
-static const struct ehci_driver_overrides ci_overrides = {
-	.product_desc =		"ChipIdea HDRC EHCI host controller",
-};
-
 static struct hc_driver __read_mostly ci_ehci_hc_driver;
 
 static irqreturn_t host_irq(struct ci13xxx *ci)
@@ -103,7 +98,7 @@ int ci_hdrc_host_init(struct ci13xxx *ci)
 	rdrv->name	= "host";
 	ci->roles[CI_ROLE_HOST] = rdrv;
 
-	ehci_init_driver(&ci_ehci_hc_driver, &ci_overrides);
+	ehci_init_driver(&ci_ehci_hc_driver, NULL);
 
 	return 0;
 }

drivers/usb/host/ehci-hcd.c

@@ -1231,10 +1231,11 @@ void ehci_init_driver(struct hc_driver *drv,
 	/* Copy the generic table to drv and then apply the overrides */
 	*drv = ehci_hc_driver;
 
-	drv->product_desc = over->product_desc;
-	drv->hcd_priv_size += over->extra_priv_size;
-	if (over->reset)
-		drv->reset = over->reset;
+	if (over) {
+		drv->hcd_priv_size += over->extra_priv_size;
+		if (over->reset)
+			drv->reset = over->reset;
+	}
 }
 EXPORT_SYMBOL_GPL(ehci_init_driver);
 

drivers/usb/host/ehci-pci.c

@@ -383,8 +383,7 @@ static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 
 static struct hc_driver __read_mostly ehci_pci_hc_driver;
 
-static const struct ehci_driver_overrides overrides = {
-	.product_desc =		"EHCI PCI host controller",
+static const struct ehci_driver_overrides pci_overrides __initdata = {
 	.reset =		ehci_pci_setup,
 };
 
@@ -426,7 +425,7 @@ static int __init ehci_pci_init(void)
 
 	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
 
-	ehci_init_driver(&ehci_pci_hc_driver, &overrides);
+	ehci_init_driver(&ehci_pci_hc_driver, &pci_overrides);
 
 	/* Entries for the PCI suspend/resume callbacks are special */
 	ehci_pci_hc_driver.pci_suspend = ehci_suspend;

drivers/usb/host/ehci-platform.c

@@ -57,8 +57,7 @@ static int ehci_platform_reset(struct usb_hcd *hcd)
 
 static struct hc_driver __read_mostly ehci_platform_hc_driver;
 
-static const struct ehci_driver_overrides platform_overrides = {
-	.product_desc =	"Generic Platform EHCI controller",
+static const struct ehci_driver_overrides platform_overrides __initdata = {
 	.reset =	ehci_platform_reset,
 };
 

drivers/usb/host/ehci.h

@@ -784,7 +784,6 @@ static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
 /* Declarations of things exported for use by ehci platform drivers */
 
 struct ehci_driver_overrides {
-	const char	*product_desc;
 	size_t		extra_priv_size;
 	int		(*reset)(struct usb_hcd *hcd);
 };