staging: r8188eu: remove usb_vendor_req_buf member of dvobj_priv

Memory allocation moved into usbctrl_vendorreq function.
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/drv_types.h

@@ -157,8 +157,6 @@ struct dvobj_priv {
 	int	ep_num[5]; /* endpoint number */
 	struct mutex  usb_vendor_req_mutex;
 
-	u8 *usb_vendor_req_buf;
-
 	struct usb_interface *pusbintf;
 	struct usb_device *pusbdev;
 };

drivers/staging/rtl8188eu/os_dep/usb_intf.c

@@ -107,13 +107,6 @@ static struct dvobj_priv *usb_dvobj_init(struct usb_interface *usb_intf)
 		pdvobjpriv->ishighspeed = false;
 
 	mutex_init(&pdvobjpriv->usb_vendor_req_mutex);
-	pdvobjpriv->usb_vendor_req_buf = kzalloc(MAX_USB_IO_CTL_SIZE, GFP_KERNEL);
-
-	if (!pdvobjpriv->usb_vendor_req_buf) {
-		usb_set_intfdata(usb_intf, NULL);
-		kfree(pdvobjpriv);
-		return NULL;
-	}
 	usb_get_dev(pusbd);
 
 	return pdvobjpriv;
@@ -141,7 +134,6 @@ static void usb_dvobj_deinit(struct usb_interface *usb_intf)
 			}
 		}
 
-		kfree(dvobj->usb_vendor_req_buf);
 		mutex_destroy(&dvobj->usb_vendor_req_mutex);
 		kfree(dvobj);
 	}

drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c

@@ -251,7 +251,7 @@ static int usbctrl_vendorreq(struct adapter *adapt, u8 request, u16 value, u16 i
 	}
 
 	/*  Acquire IO memory for vendorreq */
-	pIo_buf = dvobjpriv->usb_vendor_req_buf;
+	pIo_buf = kmalloc(MAX_USB_IO_CTL_SIZE, GFP_ATOMIC);
 
 	if (pIo_buf == NULL) {
 		DBG_88E("[%s] pIo_buf == NULL\n", __func__);
@@ -303,6 +303,8 @@ static int usbctrl_vendorreq(struct adapter *adapt, u8 request, u16 value, u16 i
 		if ((value >= FW_8188E_START_ADDRESS && value <= FW_8188E_END_ADDRESS) || status == len)
 			break;
 	}
+	kfree(pIo_buf);
+
 release_mutex:
 	mutex_unlock(&dvobjpriv->usb_vendor_req_mutex);
 exit: