From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 12/12] e1000e: 82574/82583 Tx hang workaround Date: Wed, 25 Jan 2012 23:21:55 -0800 Message-ID: <1327562515-29664-13-git-send-email-jeffrey.t.kirsher@intel.com> References: <1327562515-29664-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Bruce Allan , netdev@vger.kernel.org, gospo@redhat.com, sassmann@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga01.intel.com ([192.55.52.88]:54466 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751710Ab2AZHWD (ORCPT ); Thu, 26 Jan 2012 02:22:03 -0500 In-Reply-To: <1327562515-29664-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Bruce Allan On 82574/82583, there is a hardware bug which might cause a Tx hang when the internal buffer is full. Setting this bit enables a hardware fix to work around the issue. Signed-off-by: Bruce Allan Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/e1000e/82571.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c index a3e65fd..0609ac6 100644 --- a/drivers/net/ethernet/intel/e1000e/82571.c +++ b/drivers/net/ethernet/intel/e1000e/82571.c @@ -1227,6 +1227,10 @@ static void e1000_initialize_hw_bits_82571(struct e1000_hw *hw) case e1000_82572: reg |= (1 << 23) | (1 << 24) | (1 << 25) | (1 << 26); break; + case e1000_82574: + case e1000_82583: + reg |= (1 << 26); + break; default: break; } -- 1.7.7.6