linux-kernel - [PATCH 7/13] drivers/staging/otus: use USB API functions rather than constants

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Date:	Mon, 29 Dec 2008 11:21:29 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	lrodriguez@...eros.com, gregkh@...e.de,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 7/13] drivers/staging/otus: use USB API functions rather than
 constants

From: Julia Lawall <julia@...u.dk>

This set of patches introduces calls to the following set of functions:

usb_endpoint_dir_in(epd)
usb_endpoint_dir_out(epd)
usb_endpoint_is_bulk_in(epd)
usb_endpoint_is_bulk_out(epd)
usb_endpoint_is_int_in(epd)
usb_endpoint_is_int_out(epd)
usb_endpoint_num(epd)
usb_endpoint_type(epd)
usb_endpoint_xfer_bulk(epd)
usb_endpoint_xfer_control(epd)
usb_endpoint_xfer_int(epd)
usb_endpoint_xfer_isoc(epd)

In some cases, introducing one of these functions is not possible, and it
just replaces an explicit integer value by one of the following constants:

USB_ENDPOINT_XFER_BULK
USB_ENDPOINT_XFER_CONTROL
USB_ENDPOINT_XFER_INT
USB_ENDPOINT_XFER_ISOC

An extract of the semantic patch that makes these changes is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r1@ struct usb_endpoint_descriptor *epd; @@

- ((epd->bmAttributes & \(USB_ENDPOINT_XFERTYPE_MASK\|3\)) ==
- \(USB_ENDPOINT_XFER_CONTROL\|0\))
+ usb_endpoint_xfer_control(epd)

@r5@ struct usb_endpoint_descriptor *epd; @@

- ((epd->bEndpointAddress & \(USB_ENDPOINT_DIR_MASK\|0x80\)) ==
-  \(USB_DIR_IN\|0x80\))
+ usb_endpoint_dir_in(epd)

@inc@
@@

#include <linux/usb.h>

@depends on !inc && (r1||r5)@
@@

+ #include <linux/usb.h>
  #include <linux/usb/...>
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/staging/otus/usbdrv.c |   12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/otus/usbdrv.c b/drivers/staging/otus/usbdrv.c
index 817228d..4443a2c 100644
--- a/drivers/staging/otus/usbdrv.c
+++ b/drivers/staging/otus/usbdrv.c
@@ -936,30 +936,26 @@ int zfLnxAllocAllUrbs(struct usbdrv_private *macp)
     for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
     {
         endpoint = &iface_desc->endpoint[i].desc;
-        if ((endpoint->bEndpointAddress & 0x80) &&
-            ((endpoint->bmAttributes & 3) == 0x02))
+	 if (usb_endpoint_is_bulk_in(endpoint))
         {
             /* we found a bulk in endpoint */
             printk(KERN_ERR "bulk in: wMaxPacketSize = %x\n", le16_to_cpu(endpoint->wMaxPacketSize));
         }
 
-        if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
-            ((endpoint->bmAttributes & 3) == 0x02))
+	 if (usb_endpoint_is_bulk_out(endpoint))
         {
             /* we found a bulk out endpoint */
             printk(KERN_ERR "bulk out: wMaxPacketSize = %x\n", le16_to_cpu(endpoint->wMaxPacketSize));
         }
 
-        if ((endpoint->bEndpointAddress & 0x80) &&
-            ((endpoint->bmAttributes & 3) == 0x03))
+	 if (usb_endpoint_is_int_in(endpoint))
         {
             /* we found a interrupt in endpoint */
             printk(KERN_ERR "interrupt in: wMaxPacketSize = %x\n", le16_to_cpu(endpoint->wMaxPacketSize));
             printk(KERN_ERR "interrupt in: int_interval = %d\n", endpoint->bInterval);
         }
 
-        if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
-            ((endpoint->bmAttributes & 3) == 0x03))
+	 if (usb_endpoint_is_int_out(endpoint))
         {
             /* we found a interrupt out endpoint */
             printk(KERN_ERR "interrupt out: wMaxPacketSize = %x\n", le16_to_cpu(endpoint->wMaxPacketSize));
--
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