diff --git a/hal/usb_ops_linux.c b/hal/usb_ops_linux.c
index 82bff6f..c4e3b73 100755
--- a/hal/usb_ops_linux.c
+++ b/hal/usb_ops_linux.c
@@ -62,21 +62,7 @@ static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u8 request, u16 value, u
 	_enter_critical_mutex(&pdvobjpriv->usb_vendor_req_mutex, NULL);
 
 	/*  Acquire IO memory for vendorreq */
-#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_PREALLOC
 	pIo_buf = pdvobjpriv->usb_vendor_req_buf;
-#else
-	#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_DYNAMIC_ALLOCATE
-	tmp_buf = rtw_malloc( (u32) len + ALIGNMENT_UNIT);
-	tmp_buflen =  (u32)len + ALIGNMENT_UNIT;
-	#else /*  use stack memory */
-	tmp_buflen = MAX_USB_IO_CTL_SIZE;
-	#endif
-
-	/*  Added by Albert 2010/02/09 */
-	/*  For mstar platform, mstar suggests the address for USB IO should be 16 bytes alignment. */
-	/*  Trying to fix it here. */
-	pIo_buf = (tmp_buf==NULL)?NULL:tmp_buf + ALIGNMENT_UNIT -((SIZE_PTR)(tmp_buf) & 0x0f );
-#endif
 
 	if ( pIo_buf== NULL) {
 		DBG_8192C( "[%s] pIo_buf == NULL \n", __FUNCTION__ );
diff --git a/include/autoconf.h b/include/autoconf.h
index 0e2f9bd..d0e7fbe 100755
--- a/include/autoconf.h
+++ b/include/autoconf.h
@@ -76,12 +76,6 @@
 #define CONFIG_BR_EXT_BRNAME	"br0"
 #endif	// CONFIG_BR_EXT
 
-/*
- * USB VENDOR REQ BUFFER ALLOCATION METHOD
- * if not set we'll use function local variable (stack memory)
- */
-#define CONFIG_USB_VENDOR_REQ_BUFFER_PREALLOC
-
 /*
  * HAL  Related Config
  */
diff --git a/include/drv_types.h b/include/drv_types.h
index a960272..ccd0ffb 100755
--- a/include/drv_types.h
+++ b/include/drv_types.h
@@ -274,10 +274,8 @@ struct dvobj_priv
 
 	_mutex  usb_vendor_req_mutex;
 
-#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_PREALLOC
-	u8 * usb_alloc_vendor_req_buf;
-	u8 * usb_vendor_req_buf;
-#endif
+	u8 *usb_alloc_vendor_req_buf;
+	u8 *usb_vendor_req_buf;
 
 	struct usb_interface *pusbintf;
 	struct usb_device *pusbdev;
diff --git a/os_dep/usb_intf.c b/os_dep/usb_intf.c
index 67c0cc3..841d6e4 100755
--- a/os_dep/usb_intf.c
+++ b/os_dep/usb_intf.c
@@ -228,7 +228,6 @@ static u8 rtw_init_intf_priv(struct dvobj_priv *dvobj)
 
 	_rtw_mutex_init(&dvobj->usb_vendor_req_mutex);
 
-	#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_PREALLOC
 	dvobj->usb_alloc_vendor_req_buf = rtw_zmalloc(MAX_USB_IO_CTL_SIZE);
 	if (dvobj->usb_alloc_vendor_req_buf == NULL) {
 		DBG_871X("alloc usb_vendor_req_buf failed... /n");
@@ -238,20 +237,15 @@ static u8 rtw_init_intf_priv(struct dvobj_priv *dvobj)
 	dvobj->usb_vendor_req_buf  =
 		(u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(dvobj->usb_alloc_vendor_req_buf ), ALIGNMENT_UNIT);
 exit:
-	#endif
-
 	return rst;
-
 }
 
 static u8 rtw_deinit_intf_priv(struct dvobj_priv *dvobj)
 {
 	u8 rst = _SUCCESS;
 
-	#ifdef CONFIG_USB_VENDOR_REQ_BUFFER_PREALLOC
 	if(dvobj->usb_vendor_req_buf)
 		rtw_mfree(dvobj->usb_alloc_vendor_req_buf, MAX_USB_IO_CTL_SIZE);
-	#endif
 
 	_rtw_mutex_free(&dvobj->usb_vendor_req_mutex);