From 8f355e5cee63c2c0c145d8206c4245d0189f47ff Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Tue, 25 Feb 2014 13:17:59 +0000
Subject: [PATCH] sfc: check for NULL efx->ptp_data in efx_ptp_event

If we receive a PTP event from the NIC when we haven't set up PTP state
in the driver, we attempt to read through a NULL pointer efx->ptp_data,
triggering a panic.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Reading git-format-patch failed