From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932608Ab0JDUtI (ORCPT ); Mon, 4 Oct 2010 16:49:08 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:56535 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757158Ab0JDUtE (ORCPT ); Mon, 4 Oct 2010 16:49:04 -0400 From: Fernando Guzman Lugo To: , Cc: , , , , , Fernando Guzman Lugo Subject: [PATCHv2 1/3] iovmm: no gap checking for fixed address Date: Mon, 4 Oct 2010 16:02:15 -0500 Message-Id: <1286226137-1233-2-git-send-email-x0095840@ti.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1286226137-1233-1-git-send-email-x0095840@ti.com> References: <1286226137-1233-1-git-send-email-x0095840@ti.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If some fixed da address is wanted to be mapped and the page is freed but it is used as gap, the mapping will fail. This patch is fixing that and olny keeps the gap for not fixed address. Signed-off-by: Fernando Guzman Lugo --- arch/arm/plat-omap/iovmm.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c index 24ca9c4..34f0012 100644 --- a/arch/arm/plat-omap/iovmm.c +++ b/arch/arm/plat-omap/iovmm.c @@ -289,7 +289,7 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, prev_end = 0; list_for_each_entry(tmp, &obj->mmap, list) { - if (prev_end >= start) + if (prev_end > start) break; if (start + bytes <= tmp->da_start) @@ -301,7 +301,7 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, prev_end = tmp->da_end; } - if ((start > prev_end) && (ULONG_MAX - start >= bytes)) + if ((start >= prev_end) && (ULONG_MAX - start + 1 >= bytes)) goto found; dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n", -- 1.6.3.3