From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3433C33CB1 for ; Thu, 16 Jan 2020 16:46:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7755821582 for ; Thu, 16 Jan 2020 16:46:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579193193; bh=4h3DkzSaclz8Yq3IfZOqDEUESWUJ+zaHTz04Uj0KSZ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vVjO82//mBMVs+Z2uPVAwRk9M9m+rnp/BrIGe2vWvnm9mou3S7dclONG+qWeNbW3F l4t94VmcQFBM+AHoeZtR8kcxSLM7rHvtXBYRNUToQDV88a9VFUN+QI8/NDRjuqyMfT 5fJ9RVdT0lGzXzjMmUnUHnMaHRREVp7eXwU2HhOc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729801AbgAPQqc (ORCPT ); Thu, 16 Jan 2020 11:46:32 -0500 Received: from mail.kernel.org ([198.145.29.99]:55856 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729799AbgAPQqc (ORCPT ); Thu, 16 Jan 2020 11:46:32 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DDC222081E; Thu, 16 Jan 2020 16:46:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579193191; bh=4h3DkzSaclz8Yq3IfZOqDEUESWUJ+zaHTz04Uj0KSZ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r890BBkYTT7C68sCS67Hjv5sTO1J93nfb/UjISN4wr71jXhMoGHlOEhnbzLFPwMKm npwpgB4ORtoobdluxbH8pYjFXMj2Pkw0kQsnHllvPuklxEOZeBw83qrQJcYwVSCr3p VQaZXf6wVr2HdjSmiSy3iihs9mhsD9k/H08wvs8Q= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Remi Pommarel , Lorenzo Pieralisi , Thomas Petazzoni , Sasha Levin , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 043/205] PCI: aardvark: Fix PCI_EXP_RTCTL register configuration Date: Thu, 16 Jan 2020 11:40:18 -0500 Message-Id: <20200116164300.6705-43-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116164300.6705-1-sashal@kernel.org> References: <20200116164300.6705-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Remi Pommarel [ Upstream commit c0f05a6ab52535c1bf5f43272eede3e11c5701a5 ] PCI_EXP_RTCTL is used to activate PME interrupt only, so writing into it should not modify other interrupts' mask. The ISR mask polarity was also inverted, when PCI_EXP_RTCTL_PMEIE is set PCIE_MSG_PM_PME_MASK mask bit should actually be cleared. Fixes: 8a3ebd8de328 ("PCI: aardvark: Implement emulated root PCI bridge config space") Signed-off-by: Remi Pommarel Signed-off-by: Lorenzo Pieralisi Acked-by: Thomas Petazzoni Signed-off-by: Sasha Levin --- drivers/pci/controller/pci-aardvark.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index fe471861f801..97245e076548 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -428,7 +428,7 @@ advk_pci_bridge_emul_pcie_conf_read(struct pci_bridge_emul *bridge, case PCI_EXP_RTCTL: { u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG); - *value = (val & PCIE_MSG_PM_PME_MASK) ? PCI_EXP_RTCTL_PMEIE : 0; + *value = (val & PCIE_MSG_PM_PME_MASK) ? 0 : PCI_EXP_RTCTL_PMEIE; return PCI_BRIDGE_EMUL_HANDLED; } @@ -478,10 +478,15 @@ advk_pci_bridge_emul_pcie_conf_write(struct pci_bridge_emul *bridge, advk_pcie_wait_for_retrain(pcie); break; - case PCI_EXP_RTCTL: - new = (new & PCI_EXP_RTCTL_PMEIE) << 3; - advk_writel(pcie, new, PCIE_ISR0_MASK_REG); + case PCI_EXP_RTCTL: { + /* Only mask/unmask PME interrupt */ + u32 val = advk_readl(pcie, PCIE_ISR0_MASK_REG) & + ~PCIE_MSG_PM_PME_MASK; + if ((new & PCI_EXP_RTCTL_PMEIE) == 0) + val |= PCIE_MSG_PM_PME_MASK; + advk_writel(pcie, val, PCIE_ISR0_MASK_REG); break; + } case PCI_EXP_RTSTA: new = (new & PCI_EXP_RTSTA_PME) >> 9; -- 2.20.1