netdev - [PATCH] [NET] Add constant for FCS/CRC length (frame check sequence)

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Message-Id: <20070515222916.9404.51955.stgit@localhost.localdomain>
Date:	Tue, 15 May 2007 15:29:16 -0700
From:	Auke Kok <auke-jan.h.kok@...el.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, jeff@...zik.org, auke@...-projects.org
Subject: [PATCH] [NET] Add constant for FCS/CRC length (frame check sequence)

From: Auke Kok <auke-jan.h.kok@...el.com>

About a dozen drivers that have some form of crc checksumming or offloading
use this constant, warranting a global define for it.

Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>
---

 include/linux/if_ether.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index 1db774c..3213f6f 100644
--- a/include/linux/if_ether.h
+++ b/include/linux/if_ether.h
@@ -33,6 +33,7 @@
 #define ETH_ZLEN	60		/* Min. octets in frame sans FCS */
 #define ETH_DATA_LEN	1500		/* Max. octets in payload	 */
 #define ETH_FRAME_LEN	1514		/* Max. octets in frame sans FCS */
+#define ETH_FCS_LEN	4		/* Octets in the FCS		 */
 
 /*
  *	These are the defined Ethernet Protocol ID's.
-
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