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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 D00F0C433E1 for ; Mon, 17 Aug 2020 18:14:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA6D420758 for ; Mon, 17 Aug 2020 18:14:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597688061; bh=e/kAoQ3oBtJDeY0Gc4RCa3dPp4rDPjCqyYysJo4fNQg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=glw51kG6cReWYt/wL24uiEHfW23A5hJa5fRxtXjUeLCwXDVxriVuepLs52Ii1Z4b8 k88l1e2/iuuzwZOlQhhxQCPFgomPTTrTndw+aHOo9GxceaiOaKWXRJvAy+Ilxo1GkP 2/4RidDmBfVuFlzuv9GC3JVH8KbL+V+MjwWt4ndk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390600AbgHQSOT (ORCPT ); Mon, 17 Aug 2020 14:14:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:54650 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730496AbgHQQGc (ORCPT ); Mon, 17 Aug 2020 12:06:32 -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 76DF120829; Mon, 17 Aug 2020 16:06:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597680391; bh=e/kAoQ3oBtJDeY0Gc4RCa3dPp4rDPjCqyYysJo4fNQg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Dcvwnw0dBTS6lYMvsoc3vAZzRVZq5tUMSHWOR8I7ovLTuXQGKEfvIt+0So3S8BFGx msp6qAhxRmUIBrH9dvoarJ+qDwtrm5BveNIo7N6uqkAPsFDzXukska6ebrJFqud3Fy tgEsfpA9A82VTw46HpAp435/qrN/L1zPiAVSX81U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kishon Vijay Abraham I , Lorenzo Pieralisi , Rob Herring , Sasha Levin Subject: [PATCH 5.4 169/270] PCI: cadence: Fix updating Vendor ID and Subsystem Vendor ID register Date: Mon, 17 Aug 2020 17:16:10 +0200 Message-Id: <20200817143804.252554194@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143755.807583758@linuxfoundation.org> References: <20200817143755.807583758@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: Kishon Vijay Abraham I [ Upstream commit e3bca37d15dca118f2ef1f0a068bb6e07846ea20 ] Commit 1b79c5284439 ("PCI: cadence: Add host driver for Cadence PCIe controller") in order to update Vendor ID, directly wrote to PCI_VENDOR_ID register. However PCI_VENDOR_ID in root port configuration space is read-only register and writing to it will have no effect. Use local management register to configure Vendor ID and Subsystem Vendor ID. Link: https://lore.kernel.org/r/20200722110317.4744-10-kishon@ti.com Fixes: 1b79c5284439 ("PCI: cadence: Add host driver for Cadence PCIe controller") Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Lorenzo Pieralisi Reviewed-by: Rob Herring Signed-off-by: Sasha Levin --- drivers/pci/controller/pcie-cadence-host.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/pcie-cadence-host.c b/drivers/pci/controller/pcie-cadence-host.c index 97e251090b4f9..0dfc778f40a7a 100644 --- a/drivers/pci/controller/pcie-cadence-host.c +++ b/drivers/pci/controller/pcie-cadence-host.c @@ -102,6 +102,7 @@ static int cdns_pcie_host_init_root_port(struct cdns_pcie_rc *rc) { struct cdns_pcie *pcie = &rc->pcie; u32 value, ctrl; + u32 id; /* * Set the root complex BAR configuration register: @@ -121,8 +122,12 @@ static int cdns_pcie_host_init_root_port(struct cdns_pcie_rc *rc) cdns_pcie_writel(pcie, CDNS_PCIE_LM_RC_BAR_CFG, value); /* Set root port configuration space */ - if (rc->vendor_id != 0xffff) - cdns_pcie_rp_writew(pcie, PCI_VENDOR_ID, rc->vendor_id); + if (rc->vendor_id != 0xffff) { + id = CDNS_PCIE_LM_ID_VENDOR(rc->vendor_id) | + CDNS_PCIE_LM_ID_SUBSYS(rc->vendor_id); + cdns_pcie_writel(pcie, CDNS_PCIE_LM_ID, id); + } + if (rc->device_id != 0xffff) cdns_pcie_rp_writew(pcie, PCI_DEVICE_ID, rc->device_id); -- 2.25.1