USB: add ep->enable

This patch (as944) adds an explicit "enabled" field to the
usb_host_endpoint structure and uses it in place of the current
mechanism.  This is merely a time-space tradeoff; it makes checking
whether URBs may be submitted to an endpoint simpler.  The existing
mechanism is efficient when converting urb->pipe to an endpoint
pointer, but it's not so efficient when urb->ep is used instead.

As a side effect, the procedure for enabling an endpoint is now a
little more complicated.  The ad-hoc inline code in usb.c and hub.c
for enabling ep0 is now replaced with calls to usb_enable_endpoint,
which is no longer static.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 10 insertions, 10 deletions

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index d8f7b089a8f0..0d618647758e 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1013,8 +1013,10 @@ void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr)
                 ep = dev->ep_in[epnum];
                 dev->ep_in[epnum] = NULL;
         }
-        if (ep && dev->bus)
+        if (ep) {
+                ep->enabled = 0;
                 usb_hcd_endpoint_disable(dev, ep);
+        }
 }
 
 /**
@@ -1096,23 +1098,21 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
  * Resets the endpoint toggle, and sets dev->ep_{in,out} pointers.
  * For control endpoints, both the input and output sides are handled.
  */
-static void
-usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep)
+void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep)
 {
-        unsigned int epaddr = ep->desc.bEndpointAddress;
-        unsigned int epnum = epaddr & USB_ENDPOINT_NUMBER_MASK;
-        int is_control;
+        int epnum = usb_endpoint_num(&ep->desc);
+        int is_out = usb_endpoint_dir_out(&ep->desc);
+        int is_control = usb_endpoint_xfer_control(&ep->desc);
 
-        is_control = ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
-                        == USB_ENDPOINT_XFER_CONTROL);
-        if (usb_endpoint_out(epaddr) || is_control) {
+        if (is_out || is_control) {
                 usb_settoggle(dev, epnum, 1, 0);
                 dev->ep_out[epnum] = ep;
         }
-        if (!usb_endpoint_out(epaddr) || is_control) {
+        if (!is_out || is_control) {
                 usb_settoggle(dev, epnum, 0, 0);
                 dev->ep_in[epnum] = ep;
         }
+        ep->enabled = 1;
 }
 
 /*