usb: musb: constify a bit

These ep and root hub structures need not be writable.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

drivers/usb/musb/musb_core.c

@@ -76,7 +76,7 @@ void musb_start(void)
  * epinfo	- Pointer to EP configuration table
  * cnt		- Number of entries in the EP conf table.
  */
-void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt)
+void musb_configure_ep(const struct musb_epinfo *epinfo, u8 cnt)
 {
 	u16 csr;
 	u16 fifoaddr = 64; /* First 64 bytes of FIFO reserved for EP0 */

drivers/usb/musb/musb_core.h

@@ -357,7 +357,7 @@ extern struct musb_regs		*musbr;
 
 /* exported functions */
 extern void musb_start(void);
-extern void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt);
+extern void musb_configure_ep(const struct musb_epinfo *epinfo, u8 cnt);
 extern void write_fifo(u8 ep, u32 length, void *fifo_data);
 extern void read_fifo(u8 ep, u32 length, void *fifo_data);
 

drivers/usb/musb/musb_hcd.c

@@ -29,7 +29,7 @@
 #define USB_MSC_BBB_GET_MAX_LUN	0xFE
 
 /* Endpoint configuration information */
-static struct musb_epinfo epinfo[3] = {
+static const struct musb_epinfo epinfo[3] = {
 	{MUSB_BULK_EP, 1, 512}, /* EP1 - Bluk Out - 512 Bytes */
 	{MUSB_BULK_EP, 0, 512}, /* EP1 - Bluk In  - 512 Bytes */
 	{MUSB_INTR_EP, 0, 64}   /* EP2 - Interrupt IN - 64 Bytes */
@@ -41,7 +41,7 @@ static int rh_devnum;
 static u32 port_status;
 
 /* Device descriptor */
-static u8 root_hub_dev_des[] = {
+static const u8 root_hub_dev_des[] = {
 	0x12,			/*  __u8  bLength; */
 	0x01,			/*  __u8  bDescriptorType; Device */
 	0x00,			/*  __u16 bcdUSB; v1.1 */
@@ -63,7 +63,7 @@ static u8 root_hub_dev_des[] = {
 };
 
 /* Configuration descriptor */
-static u8 root_hub_config_des[] = {
+static const u8 root_hub_config_des[] = {
 	0x09,			/*  __u8  bLength; */
 	0x02,			/*  __u8  bDescriptorType; Configuration */
 	0x19,			/*  __u16 wTotalLength; */
@@ -96,14 +96,14 @@ static u8 root_hub_config_des[] = {
 	0xff			/*  __u8  ep_bInterval; 255 ms */
 };
 
-static unsigned char root_hub_str_index0[] = {
+static const unsigned char root_hub_str_index0[] = {
 	0x04,			/*  __u8  bLength; */
 	0x03,			/*  __u8  bDescriptorType; String-descriptor */
 	0x09,			/*  __u8  lang ID */
 	0x04,			/*  __u8  lang ID */
 };
 
-static unsigned char root_hub_str_index1[] = {
+static const unsigned char root_hub_str_index1[] = {
 	0x1c,			/*  __u8  bLength; */
 	0x03,			/*  __u8  bDescriptorType; String-descriptor */
 	'M',			/*  __u8  Unicode */
@@ -557,7 +557,7 @@ static int musb_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
 	int len = 0;
 	int stat = 0;
 	u32 datab[4];
-	u8 *data_buf = (u8 *) datab;
+	const u8 *data_buf = (u8 *) datab;
 	u16 bmRType_bReq;
 	u16 wValue;
 	u16 wIndex;
@@ -778,25 +778,27 @@ static int musb_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
 
 		break;
 
-	case RH_GET_DESCRIPTOR | RH_CLASS:
+	case RH_GET_DESCRIPTOR | RH_CLASS: {
+		u8 *_data_buf = (u8 *) datab;
 		debug("RH_GET_DESCRIPTOR | RH_CLASS\n");
 
-		data_buf[0] = 0x09;	/* min length; */
-		data_buf[1] = 0x29;
-		data_buf[2] = 0x1;	/* 1 port */
-		data_buf[3] = 0x01;	/* per-port power switching */
-		data_buf[3] |= 0x10;	/* no overcurrent reporting */
+		_data_buf[0] = 0x09;	/* min length; */
+		_data_buf[1] = 0x29;
+		_data_buf[2] = 0x1;	/* 1 port */
+		_data_buf[3] = 0x01;	/* per-port power switching */
+		_data_buf[3] |= 0x10;	/* no overcurrent reporting */
 
 		/* Corresponds to data_buf[4-7] */
-		data_buf[4] = 0;
-		data_buf[5] = 5;
-		data_buf[6] = 0;
-		data_buf[7] = 0x02;
-		data_buf[8] = 0xff;
+		_data_buf[4] = 0;
+		_data_buf[5] = 5;
+		_data_buf[6] = 0;
+		_data_buf[7] = 0x02;
+		_data_buf[8] = 0xff;
 
 		len = min_t(unsigned int, leni,
 			    min_t(unsigned int, data_buf[0], wLength));
 		break;
+	}
 
 	case RH_GET_CONFIGURATION:
 		debug("RH_GET_CONFIGURATION\n");