From: Rabin Vincent <rabin-66gdRtMMWGc@public.gmane.org>
To: oliver-Q6YOFhsQ4GZ7tPAFqOLdPg@public.gmane.org
Cc: linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Rabin Vincent <rabin-66gdRtMMWGc@public.gmane.org>
Subject: [PATCH] net: usb: cdc_eem: fix mtu
Date: Thu, 29 Mar 2012 22:45:15 +0530 [thread overview]
Message-ID: <1333041315-4303-1-git-send-email-rabin@rab.in> (raw)
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-Q6YOFhsQ4GZ7tPAFqOLdPg@public.gmane.org>
Signed-off-by: Rabin Vincent <rabin-66gdRtMMWGc@public.gmane.org>
---
drivers/net/usb/cdc_eem.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/net/usb/cdc_eem.c b/drivers/net/usb/cdc_eem.c
index 882f53f..82d43b2 100644
--- 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, struct usb_interface *intf)
/* 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;
}
--
1.7.9.1
--
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next reply other threads:[~2012-03-29 17:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-29 17:15 Rabin Vincent [this message]
2012-04-02 3:33 ` [PATCH] net: usb: cdc_eem: fix mtu David Miller
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