From patchwork Fri Apr 6 14:55:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 10326947 X-Patchwork-Delegate: bhelgaas@google.com 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 F2D916053F for ; Fri, 6 Apr 2018 14:55:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E30DD2955B for ; Fri, 6 Apr 2018 14:55:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D7A102955C; Fri, 6 Apr 2018 14:55:50 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 68A42293F9 for ; Fri, 6 Apr 2018 14:55:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755446AbeDFOzp (ORCPT ); Fri, 6 Apr 2018 10:55:45 -0400 Received: from mail.bootlin.com ([62.4.15.54]:59563 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755443AbeDFOzn (ORCPT ); Fri, 6 Apr 2018 10:55:43 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 53DE32081F; Fri, 6 Apr 2018 16:55:42 +0200 (CEST) Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.bootlin.com (Postfix) with ESMTPSA id 223242071E; Fri, 6 Apr 2018 16:55:42 +0200 (CEST) From: Thomas Petazzoni To: Bjorn Helgaas , Lorenzo Pieralisi , linux-pci@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Gregory Clement , =?UTF-8?q?Miqu=C3=A8l=20Raynal?= , Maxime Chevallier , Antoine Tenart , Nadav Haklai , Victor Gu , Wilson Ding , stable@vger.kernel.org, Thomas Petazzoni Subject: [PATCH v4 2/6] PCI: aardvark: Set PIO_ADDR_LS correctly in advk_pcie_rd_conf() Date: Fri, 6 Apr 2018 16:55:32 +0200 Message-Id: <20180406145536.19637-3-thomas.petazzoni@bootlin.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180406145536.19637-1-thomas.petazzoni@bootlin.com> References: <20180406145536.19637-1-thomas.petazzoni@bootlin.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Victor Gu When setting the PIO_ADDR_LS register during a configuration read, we were properly passing the device number, function number and register number, but not the bus number, causing issues when reading the configuration of PCIe devices. Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver") Cc: Signed-off-by: Victor Gu Reviewed-by: Wilson Ding Reviewed-by: Nadav Haklai [Thomas: tweak commit log.] Signed-off-by: Thomas Petazzoni --- Changes since v2: - Drop PCIE_BDF() macro, since it's no longer used. Noticed by Bjorn Helgaas. --- drivers/pci/host/pci-aardvark.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c index b72f15c99793..5b8201aaf34d 100644 --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -172,8 +172,6 @@ #define PCIE_CONFIG_WR_TYPE0 0xa #define PCIE_CONFIG_WR_TYPE1 0xb -/* PCI_BDF shifts 8bit, so we need extra 4bit shift */ -#define PCIE_BDF(dev) (dev << 4) #define PCIE_CONF_BUS(bus) (((bus) & 0xff) << 20) #define PCIE_CONF_DEV(dev) (((dev) & 0x1f) << 15) #define PCIE_CONF_FUNC(fun) (((fun) & 0x7) << 12) @@ -456,7 +454,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn, advk_writel(pcie, reg, PIO_CTRL); /* Program the address registers */ - reg = PCIE_BDF(devfn) | PCIE_CONF_REG(where); + reg = PCIE_CONF_ADDR(bus->number, devfn, where); advk_writel(pcie, reg, PIO_ADDR_LS); advk_writel(pcie, 0, PIO_ADDR_MS);