USB: EHCI: Export the ehci_hub_control function

Platform drivers sometimes need to perform specific handling of hub
control requests. Make this possible by exporting the ehci_hub_control()
function which can then be called from a custom hub control handler in
the default case.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 6 insertions, 17 deletions

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 7ae0c4d51741..cc305c71ac3d 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -33,15 +33,6 @@
 
 #ifdef  CONFIG_PM
 
-static int ehci_hub_control(
-        struct usb_hcd  *hcd,
-        u16             typeReq,
-        u16             wValue,
-        u16             wIndex,
-        char            *buf,
-        u16             wLength
-);
-
 static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
 {
         return !udev->maxchild && udev->persist_enabled &&
@@ -865,7 +856,7 @@ cleanup:
 #endif /* CONFIG_USB_HCD_TEST_MODE */
 /*-------------------------------------------------------------------------*/
 
-static int ehci_hub_control (
+int ehci_hub_control(
         struct usb_hcd  *hcd,
         u16             typeReq,
         u16             wValue,
@@ -1285,6 +1276,7 @@ error_exit:
         spin_unlock_irqrestore (&ehci->lock, flags);
         return retval;
 }
+EXPORT_SYMBOL_GPL(ehci_hub_control);
 
 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
 {
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 7ef00ecb0da1..572634cd95d6 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -51,10 +51,6 @@ struct tegra_ehci_soc_config {
         bool has_hostpc;
 };
 
-static int (*orig_hub_control)(struct usb_hcd *hcd,
-                                u16 typeReq, u16 wValue, u16 wIndex,
-                                char *buf, u16 wLength);
-
 struct tegra_ehci_hcd {
         struct tegra_usb_phy *phy;
         struct clk *clk;
@@ -236,7 +232,7 @@ static int tegra_ehci_hub_control(
         spin_unlock_irqrestore(&ehci->lock, flags);
 
         /* Handle the hub control events here */
-        return orig_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
+        return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
 
 done:
         spin_unlock_irqrestore(&ehci->lock, flags);
@@ -554,8 +550,6 @@ static int __init ehci_tegra_init(void)
          * too easy.
          */
 
-        orig_hub_control = tegra_ehci_hc_driver.hub_control;
-
         tegra_ehci_hc_driver.map_urb_for_dma = tegra_ehci_map_urb_for_dma;
         tegra_ehci_hc_driver.unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma;
         tegra_ehci_hc_driver.hub_control = tegra_ehci_hub_control;
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 9dfc6c1394d6..eee228a26a0e 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -872,4 +872,7 @@ extern int	ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
 extern int      ehci_resume(struct usb_hcd *hcd, bool hibernated);
 #endif  /* CONFIG_PM */
 
+extern int      ehci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+                                 u16 wIndex, char *buf, u16 wLength);
+
 #endif /* __LINUX_EHCI_HCD_H */