netdev - [PATCH] ucc_geth: Add 8 bytes to max TX frame for VLANs

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Message-Id: <1221524685-25968-1-git-send-email-afleming@freescale.com>
Date:	Mon, 15 Sep 2008 19:24:45 -0500
From:	Andy Fleming <afleming@...escale.com>
To:	jeff@...zik.org
Cc:	netdev@...r.kernel.org,
	Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
Subject: [PATCH] ucc_geth: Add 8 bytes to max TX frame for VLANs

From: Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>

Creating a VLAN interface on top of ucc_geth adds 4 bytes
to the frame and the HW controller is not prepared to
TX a frame bigger than 1518 bytes which is 4 bytes too
small for a full VLAN frame. Also add 4 extra bytes for future
expansion.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
---
 drivers/net/ucc_geth.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index 8f944e5..8fed4bb 100644
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -113,10 +113,10 @@ static struct ucc_geth_info ugeth_primary_info = {
 	.maxGroupAddrInHash = 4,
 	.maxIndAddrInHash = 4,
 	.prel = 7,
-	.maxFrameLength = 1518,
+	.maxFrameLength = 1518+8, /* Add 4 bytes for VLAN tags and 4 extra bytes */
 	.minFrameLength = 64,
-	.maxD1Length = 1520,
-	.maxD2Length = 1520,
+	.maxD1Length = 1520+8,
+	.maxD2Length = 1520+8,
 	.vlantype = 0x8100,
 	.ecamptr = ((uint32_t) NULL),
 	.eventRegMask = UCCE_OTHER,
-- 
1.5.4.GIT

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