Jan 10 2010

USB class: make USB device id constant 

Author: Németh Márton <nm127@freemail.hu>

The id_table field of the struct usb_device_id is constant in 
so it is worth to make the initialization data also constant.

The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)

// 
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@
	struct I1 {
	  ...
	  const struct I2 *x;
	  ...
	};
@s@
identifier r.I1, y;
identifier r.x, E;
@@
	struct I1 y = {
	  .x = E,
	};
@c@
identifier r.I2;
identifier s.E;
@@
	const struct I2 E[] = ... ;
@depends on !c@
identifier r.I2;
identifier s.E;
@@
+	const
	struct I2 E[] = ...;
// 

Signed-off-by: Németh Márton 
Cc: Julia Lawall 
Cc: cocci@diku.dk
Signed-off-by: Greg Kroah-Hartman 


---
 drivers/usb/class/cdc-acm.c | 2 +-
 drivers/usb/class/cdc-wdm.c | 2 +-
 drivers/usb/class/usblp.c   | 2 +-
 drivers/usb/class/usbtmc.c  | 2 +-
 drivers/usb/wusbcore/cbaf.c | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)
 
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 95f29a2..5155ff2 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1489,7 +1489,7 @@ static int acm_reset_resume(struct usb_interface *intf)
  * USB driver structure.
  */
 
-static struct usb_device_id acm_ids[] = {
+static const struct usb_device_id acm_ids[] = {
 	/* quirky and broken devices */
 	{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
 	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 3e564bf..18aafcb 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -31,7 +31,7 @@
 #define DRIVER_AUTHOR "Oliver Neukum"
 #define DRIVER_DESC "USB Abstract Control Model driver for USB WCM Device Management"
 
-static struct usb_device_id wdm_ids[] = {
+static const struct usb_device_id wdm_ids[] = {
 	{
 		.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
 				 USB_DEVICE_ID_MATCH_INT_SUBCLASS,
diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index 9d8ec72..93b5f85 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -1390,7 +1390,7 @@ static int usblp_resume(struct usb_interface *intf)
 	return r;
 }
 
-static struct usb_device_id usblp_ids [] = {
+static const struct usb_device_id usblp_ids[] = {
 	{ USB_DEVICE_INFO(7, 1, 1) },
 	{ USB_DEVICE_INFO(7, 1, 2) },
 	{ USB_DEVICE_INFO(7, 1, 3) },
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 7c5f4e3..8588c09 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -48,7 +48,7 @@
  */
 #define USBTMC_MAX_READS_TO_CLEAR_BULK_IN	100
 
-static struct usb_device_id usbtmc_devices[] = {
+static const struct usb_device_id usbtmc_devices[] = {
 	{ USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 0), },
 	{ USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 1), },
 	{ 0, } /* terminating entry */
diff --git a/drivers/usb/wusbcore/cbaf.c b/drivers/usb/wusbcore/cbaf.c
index 25eae40..51a8e0d 100644
--- a/drivers/usb/wusbcore/cbaf.c
+++ b/drivers/usb/wusbcore/cbaf.c
@@ -641,7 +641,7 @@ static void cbaf_disconnect(struct usb_interface *iface)
 	kzfree(cbaf);
 }
 
-static struct usb_device_id cbaf_id_table[] = {
+static const struct usb_device_id cbaf_id_table[] = {
 	{ USB_INTERFACE_INFO(0xef, 0x03, 0x01), },
 	{ },
 };

qlambert