From a5be8cd3875ca051db857c9d76b253a7e7ea3f22 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <bhutchings@solarflare.com>
Date: Thu, 14 Nov 2013 00:48:56 +0000
Subject: [PATCH] ixp4xx_eth: Validate hwtstamp_config completely before
 applying it

hwtstamp_ioctl() should validate all fields of hwtstamp_config
before making any changes.  Currently it sets the TX configuration
before validating the rx_filter field.

Untested as I don't have a cross-compiler to hand.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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