net: rtl8150: Use the new usb control message API.

The old usb_control_msg() let the caller handle the error and also did not
account for partial reads.  Since these are now considered harmful, move the
driver over to usb_control_msg_recv/send() calls.

Signed-off-by: Petko Manolov <petko.manolov@konsulko.com>
Acked-by: David S. Miller <davem@davemloft.net>
Link: https://lore.kernel.org/r/20200927124909.16380-3-petko.manolov@konsulko.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/usb/rtl8150.c

@@ -152,36 +152,16 @@ static const char driver_name [] = "rtl8150";
 */
 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 {
-	void *buf;
-	int ret;
-
-	buf = kmalloc(size, GFP_NOIO);
-	if (!buf)
-		return -ENOMEM;
-
-	ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
-			      RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
-			      indx, 0, buf, size, 500);
-	if (ret > 0 && ret <= size)
-		memcpy(data, buf, ret);
-	kfree(buf);
-	return ret;
+	return usb_control_msg_recv(dev->udev, 0, RTL8150_REQ_GET_REGS,
+				    RTL8150_REQT_READ, indx, 0, data, size,
+				    1000, GFP_NOIO);
 }
 
 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
 {
-	void *buf;
-	int ret;
-
-	buf = kmemdup(data, size, GFP_NOIO);
-	if (!buf)
-		return -ENOMEM;
-
-	ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
-			      RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
-			      indx, 0, buf, size, 500);
-	kfree(buf);
-	return ret;
+	return usb_control_msg_send(dev->udev, 0, RTL8150_REQ_SET_REGS,
+				    RTL8150_REQT_WRITE, indx, 0, data, size,
+				    1000, GFP_NOIO);
 }
 
 static void async_set_reg_cb(struct urb *urb)