From 19833b5dffe2f2e92a1b377f9aae9d5f32239512 Mon Sep 17 00:00:00 2001
From: Bruce Allan <bruce.w.allan@intel.com>
Date: Thu, 19 Aug 2010 15:48:30 -0700
Subject: [PATCH] e1000e: disable ASPM L1 on 82573
On the e1000-devel mailing list, Nils Faerber reported latency issues with
the 82573 LOM on a ThinkPad X60. It was found to be caused by ASPM L1;
disabling it resolves the latency. The issue is present in kernels back
to 2.6.34 and possibly 2.6.33.
Reported-by: Nils Faerber <nils.faerber@kernelconcepts.de>
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Cc: stable@kernel.org
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/e1000e/82571.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index a4a0d2b6eb1c..f844e6c6063b 100644
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -1833,6 +1833,7 @@ struct e1000_info e1000_82573_info = {
| FLAG_HAS_SMART_POWER_DOWN
| FLAG_HAS_AMT
| FLAG_HAS_SWSM_ON_LOAD,
+ .flags2 = FLAG2_DISABLE_ASPM_L1,
.pba = 20,
.max_hw_frame_size = ETH_FRAME_LEN + ETH_FCS_LEN,
.get_variants = e1000_get_variants_82571,
--
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