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=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 3D6D9C04EBF for ; Tue, 16 Oct 2018 04:15:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0220921470 for ; Tue, 16 Oct 2018 04:15:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="GkgtFLTr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0220921470 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729777AbeJPMD4 (ORCPT ); Tue, 16 Oct 2018 08:03:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:52572 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729752AbeJPMDz (ORCPT ); Tue, 16 Oct 2018 08:03:55 -0400 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 C291821480; Tue, 16 Oct 2018 04:15:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1539663332; bh=c4kPm3R3hw2Lt+dAiK30/w4hDLtJaIYygyUFqeZC3sQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GkgtFLTrQAPwZblpv7OX9eCeqsFPCtu4Ke/3dtxaGrdKos409B5vjtVV4Hi1kqgnT pdDpnV31Q1Gpx4lIi/wtFfHHYPnFrU0TCCbyTslpp6ZHNd74GXHdDQBkk9S7NCaky4 aYM7aqxV6FObB6hPLO2qCov1+mVt6Mc63WTll3s0= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Thomas Petazzoni , Thomas Petazzoni , Russell King , Sasha Levin Subject: [PATCH AUTOSEL 4.9 08/38] ARM: 8799/1: mm: fix pci_ioremap_io() offset check Date: Tue, 16 Oct 2018 00:14:52 -0400 Message-Id: <20181016041522.135789-8-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181016041522.135789-1-sashal@kernel.org> References: <20181016041522.135789-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thomas Petazzoni [ Upstream commit 3a58ac65e2d7969bcdf1b6acb70fa4d12a88e53e ] IO_SPACE_LIMIT is the ending address of the PCI IO space, i.e something like 0xfffff (and not 0x100000). Therefore, when offset = 0xf0000 is passed as argument, this function fails even though the offset + SZ_64K fits below the IO_SPACE_LIMIT. This makes the last chunk of 64 KB of the I/O space not usable as it cannot be mapped. This patch fixes that by substracing 1 to offset + SZ_64K, so that we compare the addrss of the last byte of the I/O space against IO_SPACE_LIMIT instead of the address of the first byte of what is after the I/O space. Fixes: c2794437091a4 ("ARM: Add fixed PCI i/o mapping") Signed-off-by: Thomas Petazzoni Acked-by: Nicolas Pitre Signed-off-by: Russell King Signed-off-by: Sasha Levin --- arch/arm/mm/ioremap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c index ff0eed23ddf1..66e5d8765601 100644 --- a/arch/arm/mm/ioremap.c +++ b/arch/arm/mm/ioremap.c @@ -473,7 +473,7 @@ void pci_ioremap_set_mem_type(int mem_type) int pci_ioremap_io(unsigned int offset, phys_addr_t phys_addr) { - BUG_ON(offset + SZ_64K > IO_SPACE_LIMIT); + BUG_ON(offset + SZ_64K - 1 > IO_SPACE_LIMIT); return ioremap_page_range(PCI_IO_VIRT_BASE + offset, PCI_IO_VIRT_BASE + offset + SZ_64K, -- 2.17.1