From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 12/16] i40e: clear qtx_head before enabling Tx queue Date: Fri, 10 Jan 2014 00:58:52 -0800 Message-ID: <1389344336-1558-13-git-send-email-jeffrey.t.kirsher@intel.com> References: <1389344336-1558-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Shannon Nelson , netdev@vger.kernel.org, gospo@redhat.com, sassmann@redhat.com, Jesse Brandeburg , Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga11.intel.com ([192.55.52.93]:50715 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751013AbaAJI7G (ORCPT ); Fri, 10 Jan 2014 03:59:06 -0500 In-Reply-To: <1389344336-1558-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Shannon Nelson Make sure the "new" qtx_head[q] register is cleared before enabling the Tx queue. Change-ID: I0c7a12815e343a5ae68807af172a35d6c6857935 Signed-off-by: Shannon Nelson Signed-off-by: Jesse Brandeburg Tested-by: Kavindya Deegala Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 65c27cb..bc14a85 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -3008,11 +3008,13 @@ static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable) continue; /* turn on/off the queue */ - if (enable) + if (enable) { + wr32(hw, I40E_QTX_HEAD(pf_q), 0); tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK | I40E_QTX_ENA_QENA_STAT_MASK; - else + } else { tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK; + } wr32(hw, I40E_QTX_ENA(pf_q), tx_reg); -- 1.8.3.1