From: Bjørn Mork Date: Fri, 1 Nov 2013 10:16:52 +0000 (+0100) Subject: net: cdc_ncm: set correct dev->hard_mtu X-Git-Tag: firefly_0821_release~176^2~4992^2~79^2~9 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=43c87f78388443e3bf6c73c05574bfa15b994f0a;p=firefly-linux-kernel-4.4.55.git net: cdc_ncm: set correct dev->hard_mtu 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 --- 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;