net: cdc_ncm: fix SET_MAX_DATAGRAM_SIZE

We need to inform the device about the *new* value, not the
old one.

Cc: Alexey Orishko <alexey.orishko@gmail.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 4de3a5423e875567bf656702d7e15f99fa55b3b8..b8de8ddd6d98fa1c19ea254d9c9363cea5e6d1cd 100644 (file)
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -280,6 +280,7 @@ static u8 cdc_ncm_setup(struct usbnet *dev)
                        /* if value changed, update device */
                        if (ctx->max_datagram_size !=
                                        le16_to_cpu(max_datagram_size)) {
+                               max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
                                err = usbnet_write_cmd(dev,
                                                USB_CDC_SET_MAX_DATAGRAM_SIZE,
                                                USB_TYPE_CLASS | USB_DIR_OUT