USB: Add a usb_pipe_endpoint() convenience function

Converting a pipe number to a struct usb_host_endpoint pointer is a little
messy.  Introduce a new convenience function to hide the mess.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 79d1cdf..d8329eb 100644 (file)
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -226,8 +226,7 @@ int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe,
        struct urb *urb;
        struct usb_host_endpoint *ep;
 
-       ep = (usb_pipein(pipe) ? usb_dev->ep_in : usb_dev->ep_out)
-                       [usb_pipeendpoint(pipe)];
+       ep = usb_pipe_endpoint(usb_dev, pipe);
        if (!ep || len < 0)
                return -EINVAL;
 

diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index a760e46..7c05555 100644 (file)
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -308,8 +308,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
         * will be required to set urb->ep directly and we will eliminate
         * urb->pipe.
         */
-       ep = (usb_pipein(urb->pipe) ? dev->ep_in : dev->ep_out)
-                       [usb_pipeendpoint(urb->pipe)];
+       ep = usb_pipe_endpoint(dev, urb->pipe);
        if (!ep)
                return -ENOENT;
 

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 1eb4762..fd7d61e 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1552,6 +1552,14 @@ static inline unsigned int __create_pipe(struct usb_device *dev,
 #define usb_rcvintpipe(dev,endpoint)   \
        ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN)
 
+static inline struct usb_host_endpoint *
+usb_pipe_endpoint(struct usb_device *dev, unsigned int pipe)
+{
+       struct usb_host_endpoint **eps;
+       eps = usb_pipein(pipe) ? dev->ep_in : dev->ep_out;
+       return eps[usb_pipeendpoint(pipe)];
+}
+
 /*-------------------------------------------------------------------------*/
 
 static inline __u16