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    Subject[ 06/78] net: usb: cdc_eem: fix mtu
    3.3-stable review patch.  If anyone has any objections, please let me know.

    ------------------


    From: Rabin Vincent <rabin@rab.in>

    [ Upstream commit 78fb72f7936c01d5b426c03a691eca082b03f2b9 ]

    Make CDC EEM recalculate the hard_mtu after adjusting the
    hard_header_len.

    Without this, usbnet adjusts the MTU down to 1494 bytes, and the host is
    unable to receive standard 1500-byte frames from the device.

    Tested with the Linux USB Ethernet gadget.

    Cc: Oliver Neukum <oliver@neukum.name>
    Signed-off-by: Rabin Vincent <rabin@rab.in>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/net/usb/cdc_eem.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/net/usb/cdc_eem.c
    +++ b/drivers/net/usb/cdc_eem.c
    @@ -93,6 +93,7 @@ static int eem_bind(struct usbnet *dev,
    /* no jumbogram (16K) support for now */

    dev->net->hard_header_len += EEM_HEAD + ETH_FCS_LEN;
    + dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;

    return 0;
    }



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