From patchwork Sat Feb 20 02:49:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hongxing Zhu X-Patchwork-Id: 12096685 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 3F7A9C43381 for ; Sat, 20 Feb 2021 03:04:11 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0552964EE0 for ; Sat, 20 Feb 2021 03:04:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0552964EE0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version: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=WKzDu/jQ+41NphcMV+vH0CTLuTgQN//08k8/2BIJbxg=; b=gbmlAiN+gUKRQIbr9ALZMhTsG BIK7d1cHoe5LQzqkN/ZNZOYGXZ5iuC4TL5g5zsMgVporjam4VPBYCAUDoE2em2+AQ0a3AyWEbYEdj 3yborx3WenT6isyXL/f/L3mD3I/QbgxJcCQs5LmjTk0ivdJgeAnFLcPp//4/maC5lVabOohlPgUdE j4hGTU5r6zlcBsFA0hko1ZsOjO7I0tfTPAHmADKTQH4QeFVUBa2jG4GERZmU98bSK7IeJKddmvHwz FL/1M8t7ysDIXv+/7vhJeCmlwczuSSArqhiiLd4FYO8glugSsT/k/RWaWKxkNPqtvXZFTrY3+YSam C/fNbWoFg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lDIWp-0002dL-Af; Sat, 20 Feb 2021 03:01:55 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lDIWk-0002cn-U7 for linux-arm-kernel@lists.infradead.org; Sat, 20 Feb 2021 03:01:52 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 5BE67200165; Sat, 20 Feb 2021 04:01:49 +0100 (CET) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 99AE32006B1; Sat, 20 Feb 2021 04:01:43 +0100 (CET) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 050E5402F6; Sat, 20 Feb 2021 04:01:34 +0100 (CET) From: Richard Zhu To: l.stach@pengutronix.de, kw@linux.com, bhelgaas@google.com, stefan@agner.ch, lorenzo.pieralisi@arm.com Subject: [PATCH v2] PCI: imx6: Limit DBI register length for imx6qp PCIe Date: Sat, 20 Feb 2021 10:49:48 +0800 Message-Id: <1613789388-2495-2-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1613789388-2495-1-git-send-email-hongxing.zhu@nxp.com> References: <1613789388-2495-1-git-send-email-hongxing.zhu@nxp.com> MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210219_220151_087947_4995E716 X-CRM114-Status: GOOD ( 11.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Richard Zhu , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Define the length of the DBI registers and limit config space to its length. This makes sure that the kernel does not access registers beyond that point that otherwise would lead to an abort on the i.MX 6QuadPlus. See commit 075af61c19cd ("PCI: imx6: Limit DBI register length") that resolves a similar issue on the i.MX 6Quad PCIe. Signed-off-by: Richard Zhu Reviewed-by: Lucas Stach Reviewed-by: Krzysztof Wilczyński --- drivers/pci/controller/dwc/pci-imx6.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 0cf1333c0440..853ea8e82952 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1175,6 +1175,7 @@ static const struct imx6_pcie_drvdata drvdata[] = { .variant = IMX6QP, .flags = IMX6_PCIE_FLAG_IMX6_PHY | IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE, + .dbi_length = 0x200, }, [IMX7D] = { .variant = IMX7D,