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    Subject[ 081/167] [PATCH 21/26] net: usb: smsc75xx: fix mtu
    3.2-stable review patch.  If anyone has any objections, please let me know.

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

    From: Stephane Fillod <fillods@users.sf.net>

    [ Upstream commit a99ff7d0123b19ecad3b589480b6542716ab6b52 ]

    Make smsc75xx recalculate the hard_mtu after adjusting the
    hard_header_len.

    Without this, usbnet adjusts the MTU down to 1492 bytes, and the host is
    unable to receive standard 1500-byte frames from the device.

    Inspired by same fix on cdc_eem 78fb72f7936c01d5b426c03a691eca082b03f2b9.

    Tested on ARM/Omap3 with EVB-LAN7500-LC.

    Signed-off-by: Stephane Fillod <fillods@users.sf.net>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    drivers/net/usb/smsc75xx.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
    index a5b9b12..7bd219b 100644
    --- a/drivers/net/usb/smsc75xx.c
    +++ b/drivers/net/usb/smsc75xx.c
    @@ -1050,6 +1050,7 @@ static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
    dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
    dev->net->flags |= IFF_MULTICAST;
    dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
    + dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
    return 0;
    }

    --
    1.7.10




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