usb: wusbcore: Use put_unaligned_le32

Use put_unaligned_le32 rather than using byte ordering function and
memcpy which makes code clear.
Also, add the header file where it is declared.

Done using Coccinelle and semantic patch used is :

@ rule1 @
identifier tmp; expression ptr,x; type T;
@@

- tmp = cpu_to_le32(x);

  <+... when != tmp
- memcpy(ptr, (T)&tmp, ...);
+ put_unaligned_le32(x,ptr);
  ...+>

@ depends on rule1 @
type j; identifier tmp;
@@

- j tmp;
  ...when != tmp
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/wusbcore/security.c

@@ -28,6 +28,7 @@
 #include <linux/random.h>
 #include <linux/export.h>
 #include "wusbhc.h"
+#include <asm/unaligned.h>
 
 static void wusbhc_gtk_rekey_work(struct work_struct *work);
 
@@ -367,7 +368,6 @@ int wusb_dev_4way_handshake(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev,
 	struct usb_device *usb_dev = wusb_dev->usb_dev;
 	struct device *dev = &usb_dev->dev;
 	u32 tkid;
-	__le32 tkid_le;
 	struct usb_handshake *hs;
 	struct aes_ccm_nonce ccm_n;
 	u8 mic[8];
@@ -385,11 +385,10 @@ int wusb_dev_4way_handshake(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev,
 		goto error_dev_set_encryption;
 
 	tkid = wusbhc_next_tkid(wusbhc, wusb_dev);
-	tkid_le = cpu_to_le32(tkid);
 
 	hs[0].bMessageNumber = 1;
 	hs[0].bStatus = 0;
-	memcpy(hs[0].tTKID, &tkid_le, sizeof(hs[0].tTKID));
+	put_unaligned_le32(tkid, hs[0].tTKID);
 	hs[0].bReserved = 0;
 	memcpy(hs[0].CDID, &wusb_dev->cdid, sizeof(hs[0].CDID));
 	get_random_bytes(&hs[0].nonce, sizeof(hs[0].nonce));
@@ -441,7 +440,7 @@ int wusb_dev_4way_handshake(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev,
 
 	/* Setup the CCM nonce */
 	memset(&ccm_n.sfn, 0, sizeof(ccm_n.sfn)); /* Per WUSB1.0[6.5.2] */
-	memcpy(ccm_n.tkid, &tkid_le, sizeof(ccm_n.tkid));
+	put_unaligned_le32(tkid, ccm_n.tkid);
 	ccm_n.src_addr = wusbhc->uwb_rc->uwb_dev.dev_addr;
 	ccm_n.dest_addr.data[0] = wusb_dev->addr;
 	ccm_n.dest_addr.data[1] = 0;
@@ -472,7 +471,7 @@ int wusb_dev_4way_handshake(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev,
 	/* Send Handshake3 */
 	hs[2].bMessageNumber = 3;
 	hs[2].bStatus = 0;
-	memcpy(hs[2].tTKID, &tkid_le, sizeof(hs[2].tTKID));
+	put_unaligned_le32(tkid, hs[2].tTKID);
 	hs[2].bReserved = 0;
 	memcpy(hs[2].CDID, &wusb_dev->cdid, sizeof(hs[2].CDID));
 	memcpy(hs[2].nonce, hs[0].nonce, sizeof(hs[2].nonce));