From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758475Ab3IBIz2 (ORCPT ); Mon, 2 Sep 2013 04:55:28 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:37780 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758453Ab3IBIzZ (ORCPT ); Mon, 2 Sep 2013 04:55:25 -0400 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Emmanuel Grumbach , Johannes Berg , Luis Henriques Subject: [PATCH 34/58] iwlwifi: pcie: disable L1 Active after pci_enable_device Date: Mon, 2 Sep 2013 09:54:19 +0100 Message-Id: <1378112083-9475-35-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1378112083-9475-1-git-send-email-luis.henriques@canonical.com> References: <1378112083-9475-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.5.7.21 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Emmanuel Grumbach commit eabc4ac5d7606a57ee2b7308cb7323ea8f60183b upstream. As Arjan pointed out, we mustn't do anything related to PCI configuration until the device is properly enabled with pci_enable_device(). Reported-by: Arjan van de Ven Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg [ luis: backported to 3.5: - file rename: drivers/net/wireless/iwlwifi/pcie/trans.c -> drivers/net/wireless/iwlwifi/iwl-trans-pcie.c ] Signed-off-by: Luis Henriques --- drivers/net/wireless/iwlwifi/iwl-trans-pcie.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c index 844d0f6..283b423 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c +++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c @@ -2107,16 +2107,16 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, spin_lock_init(&trans_pcie->irq_lock); init_waitqueue_head(&trans_pcie->ucode_write_waitq); - /* W/A - seems to solve weird behavior. We need to remove this if we - * don't want to stay in L1 all the time. This wastes a lot of power */ - pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | - PCIE_LINK_STATE_CLKPM); - if (pci_enable_device(pdev)) { err = -ENODEV; goto out_no_pci; } + /* W/A - seems to solve weird behavior. We need to remove this if we + * don't want to stay in L1 all the time. This wastes a lot of power */ + pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | + PCIE_LINK_STATE_CLKPM); + pci_set_master(pdev); err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); -- 1.8.3.2