diff --git a/os_dep/linux/usb_ops_linux.c b/os_dep/linux/usb_ops_linux.c
index b05978c..28ebd55 100644
--- a/os_dep/linux/usb_ops_linux.c
+++ b/os_dep/linux/usb_ops_linux.c
@@ -94,14 +94,17 @@ int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u16 value, u16 index, void *pda
 		goto release_mutex;
 	}
 
-	while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
-		memset(pIo_buf, 0, len);
+	if (requesttype == VENDOR_READ)
+		pipe = usb_rcvctrlpipe(udev, 0);/* read_in */
+	else
+		pipe = usb_sndctrlpipe(udev, 0);/* write_out */
 
-		if (requesttype == 0x01) {
-			pipe = usb_rcvctrlpipe(udev, 0);/* read_in */
+	while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
+
+		if (requesttype == VENDOR_READ) {
+			memset(pIo_buf, 0, len);
 			reqtype =  REALTEK_USB_VENQT_READ;
 		} else {
-			pipe = usb_sndctrlpipe(udev, 0);/* write_out */
 			reqtype =  REALTEK_USB_VENQT_WRITE;
 			_rtw_memcpy(pIo_buf, pdata, len);
 		}
@@ -110,13 +113,13 @@ int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u16 value, u16 index, void *pda
 
 		if (status == len) {  /* Success this control transfer. */
 			rtw_reset_continual_io_error(pdvobjpriv);
-			if (requesttype == 0x01) {
+			if (requesttype == VENDOR_READ) {
 				/* For Control read transfer, we have to copy the read data from pIo_buf to pdata. */
 				_rtw_memcpy(pdata, pIo_buf,  len);
 			}
 		} else { /* error cases */
 			RTW_INFO("reg 0x%x, usb %s %u fail, status:%d value=0x%x, vendorreq_times:%d\n"
-				, value, (requesttype == 0x01) ? "read" : "write" , len, status, *(u32 *)pdata, vendorreq_times);
+				, value, (requesttype == VENDOR_READ) ? "read" : "write" , len, status, *(u32 *)pdata, vendorreq_times);
 
 			if (status < 0) {
 				if (status == (-ESHUTDOWN)	|| status == -ENODEV)