Commit 78fb72f7 authored by Rabin Vincent's avatar Rabin Vincent Committed by David S. Miller

net: usb: cdc_eem: fix mtu

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: default avatarRabin Vincent <rabin@rab.in>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 10b9194f
...@@ -93,6 +93,7 @@ static int eem_bind(struct usbnet *dev, struct usb_interface *intf) ...@@ -93,6 +93,7 @@ static int eem_bind(struct usbnet *dev, struct usb_interface *intf)
/* no jumbogram (16K) support for now */ /* no jumbogram (16K) support for now */
dev->net->hard_header_len += EEM_HEAD + ETH_FCS_LEN; dev->net->hard_header_len += EEM_HEAD + ETH_FCS_LEN;
dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
return 0; return 0;
} }
......
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