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=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,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 7E6ABC282DD for ; Thu, 23 May 2019 19:29:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5649020879 for ; Thu, 23 May 2019 19:29:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558639797; bh=vp3dV6KU5I8Ecj9+pNSDPdkRP5pMoMq3LJJQK1A4IZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=zFZ8WFA06gXk3+llM5TrCjKyHVDxzfboswgIxZWOFxOsj/uDgzt/3EhUk3eD8cOqC DJJ0XEk+dA4hXqaR2ng5u9gEWzEXldNQMG+vk6qOA0WvEDOGLRRPzU4RxwRMM8Jl3D 0PCzl7BUpZElbxeSM//LvMkA5U4fQPYHP5drtgPI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392014AbfEWT34 (ORCPT ); Thu, 23 May 2019 15:29:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:43086 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390192AbfEWT3y (ORCPT ); Thu, 23 May 2019 15:29:54 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 052A820879; Thu, 23 May 2019 19:29:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558639793; bh=vp3dV6KU5I8Ecj9+pNSDPdkRP5pMoMq3LJJQK1A4IZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jAVA0jaMPSWNYPTnysEkkTM8PvClEfj/lJA+RHymSSkqvGWQfZ8lmuN6UUA226JCJ EL+tXPpX+tBlJYUDePIkeO3KcfEtAKBl3wq1UCUr6PqYhLdIYTiODlG0YGc5P1Z3yj 2heCEHoOG56475iA6NIeplowzrRJQR1Cq5J1otCY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nikolai Kostrigin , Bjorn Helgaas , Joerg Roedel Subject: [PATCH 5.1 094/122] PCI: Mark AMD Stoney Radeon R7 GPU ATS as broken Date: Thu, 23 May 2019 21:06:56 +0200 Message-Id: <20190523181717.581649950@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190523181705.091418060@linuxfoundation.org> References: <20190523181705.091418060@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nikolai Kostrigin commit d28ca864c493637f3c957f4ed9348a94fca6de60 upstream. ATS is broken on the Radeon R7 GPU (at least for Stoney Ridge based laptop) and causes IOMMU stalls and system failure. Disable ATS on these devices to make them usable again with IOMMU enabled. Thanks to Joerg Roedel for help. [bhelgaas: In the email thread mentioned below, Alex suspects the real problem is in sbios or iommu, so it may affect only certain systems, and it may affect other devices in those systems as well. However, per Joerg we lack the ability to debug further, so this quirk is the best we can do for now.] Link: https://bugzilla.kernel.org/show_bug.cgi?id=194521 Link: https://lore.kernel.org/lkml/20190408103725.30426-1-nickel@altlinux.org Fixes: 9b44b0b09dec ("PCI: Mark AMD Stoney GPU ATS as broken") Signed-off-by: Nikolai Kostrigin Signed-off-by: Bjorn Helgaas Acked-by: Joerg Roedel CC: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4905,6 +4905,7 @@ static void quirk_no_ats(struct pci_dev /* AMD Stoney platform GPU */ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_no_ats); #endif /* CONFIG_PCI_ATS */ /* Freescale PCIe doesn't support MSI in RC mode */