From 84efb7b968ab91d0099620865b3f563eb0ddf5a6 Mon Sep 17 00:00:00 2001
From: Bruce Allan <bruce.w.allan@intel.com>
Date: Fri, 20 Nov 2009 23:26:24 +0000
Subject: [PATCH] e1000e: provide comment for 82571 workaround

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/e1000e/82571.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index 7cdf1768afa..0e8aa3441b9 100644
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -1114,6 +1114,13 @@ static void e1000_initialize_hw_bits_82571(struct e1000_hw *hw)
 		reg |= (1 << 22);
 		ew32(GCR, reg);
 
+		/*
+		 * Workaround for hardware errata.
+		 * apply workaround for hardware errata documented in errata
+		 * docs Fixes issue where some error prone or unreliable PCIe
+		 * completions are occurring, particularly with ASPM enabled.
+		 * Without fix, issue can cause tx timeouts.
+		 */
 		reg = er32(GCR2);
 		reg |= 1;
 		ew32(GCR2, reg);
-- 
2.41.0