From 43c87f78388443e3bf6c73c05574bfa15b994f0a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Bj=C3=B8rn=20Mork?= Date: Fri, 1 Nov 2013 11:16:52 +0100 Subject: [PATCH] net: cdc_ncm: set correct dev->hard_mtu MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit usbnet use the hard_mtu value for sizing the tx queue and nothing else. We will be transmitting buffers of up to tx_max size, so that's the proper value to give usbnet. The individual datagram size is completely irrelevant here. Cc: Alexey Orishko Signed-off-by: Bjørn Mork Signed-off-by: David S. Miller --- drivers/net/usb/cdc_ncm.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index 8fc1a06604aa..c40f742f6200 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -404,13 +404,6 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_ ctx->ether_desc = (const struct usb_cdc_ether_desc *)buf; - dev->hard_mtu = - le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); - - if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) - dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; - else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) - dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; break; case USB_CDC_NCM_TYPE: @@ -485,6 +478,8 @@ advance: dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr); } + /* usbnet use these values for sizing tx/rx queues */ + dev->hard_mtu = ctx->tx_max; dev->rx_urb_size = ctx->rx_max; return 0; -- 2.30.2