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>

1 files changed, 1 insertions, 0 deletions

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,