From patchwork Thu Sep 28 12:58:36 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 9976011 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 104066034B for ; Thu, 28 Sep 2017 13:01:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F17F1295D6 for ; Thu, 28 Sep 2017 13:01:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EFD16295F9; Thu, 28 Sep 2017 13:01:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3F79E2965E for ; Thu, 28 Sep 2017 13:01:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=z/vELwOXEEMWnl1UdravFwFtIEef0ho9qNBQL2RShwA=; b=qTpn7NmBmhfPfKanI/26SrqCi4 QoqKDNJ6KVslUtQDh5jxHKkU7WzDlAVL4CnBmkVNLlMLUPQvvZlUYh2W+9mTFlElBW/Cfc2Dncj/0 8sEquUTXlqy1t8TRMNiJ61m3kJ6Iujn41t9cYqESsRFWwc7roi0ohUUwHmfbEGrdrtgsTFN+fshCa WTw4ro40uj0os3ibGKxZ6xCZsVLB3UnzUReLejvZP2LB1eC/Ryw9HpjBi2oC0frkiWrP4rJ3H2PmG tfwO1BBEaTC0uUVem8tvkRDpLc7Zh+CgQ8VWdDUxVzAaUUDPpcdP/vcXrAu79Tv/kW5FTxV1cmuDM Mz6no2kw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dxYRE-0007Pi-WE; Thu, 28 Sep 2017 13:01:13 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dxYPe-0004QR-0s for linux-arm-kernel@lists.infradead.org; Thu, 28 Sep 2017 12:59:41 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 7696F2091B; Thu, 28 Sep 2017 14:58:51 +0200 (CEST) Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 4C06020933; Thu, 28 Sep 2017 14:58:41 +0200 (CEST) From: Thomas Petazzoni To: Bjorn Helgaas , linux-pci@vger.kernel.org Subject: [PATCH v2 5/7] PCI: aardvark: disable LOS state by default Date: Thu, 28 Sep 2017 14:58:36 +0200 Message-Id: <20170928125838.11887-6-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170928125838.11887-1-thomas.petazzoni@free-electrons.com> References: <20170928125838.11887-1-thomas.petazzoni@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170928_055934_777320_1418B25B X-CRM114-Status: GOOD ( 11.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Petazzoni , Andrew Lunn , Yehuda Yitschak , Jason Cooper , Hanna Hawa , Nadav Haklai , Victor Gu , =?UTF-8?q?Miqu=C3=A8l=20Raynal?= , Gregory Clement , Antoine Tenart , linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Victor Gu Some PCIe devices do not support LOS, and will cause timeouts if the root complex forces the LOS state. This patch disables the LOS state by default. This is part of fixing bug https://bugzilla.kernel.org/show_bug.cgi?id=196339, this commit was reported as the user to be important to get a Intel 7260 mini-PCIe WiFi card working. Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver") Signed-off-by: Victor Gu Reviewed-by: Evan Wang Reviewed-by: Nadav Haklai [Thomas: tweak commit log.] Signed-off-by: Thomas Petazzoni --- drivers/pci/host/pci-aardvark.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c index 23e243135ebe..a173f31853df 100644 --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -368,8 +368,7 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) advk_pcie_wait_for_link(pcie); - reg = PCIE_CORE_LINK_L0S_ENTRY | - (1 << PCIE_CORE_LINK_WIDTH_SHIFT); + reg = (1 << PCIE_CORE_LINK_WIDTH_SHIFT); advk_writel(pcie, reg, PCIE_CORE_LINK_CTRL_STAT_REG); reg = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG);