From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757196Ab0HQQmb (ORCPT ); Tue, 17 Aug 2010 12:42:31 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:52126 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750837Ab0HQQm3 (ORCPT ); Tue, 17 Aug 2010 12:42:29 -0400 From: Fernando Guzman Lugo To: , Cc: , , Fernando Guzman Lugo Subject: [PATCH] iommu: fix end address of vm area comparation in alloc_iovm_area Date: Tue, 17 Aug 2010 11:56:01 -0500 Message-Id: <1282064161-21056-1-git-send-email-x0095840@ti.com> X-Mailer: git-send-email 1.6.3.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org End address of the vm area is .start + bytes -1., not start + byte. This patch fixes that issue by doing an inclusive comparison with tmp->da_start. This issue was preventing allocate an area of size exactly the same than the free area. I did no change the value of da_end of each vm area because it is used to get area size in several places. Signed-off-by: Fernando Guzman Lugo Acked-by: Hiroshi DOYU --- arch/arm/plat-omap/iovmm.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c index 8ce0de2..24ca9c4 100644 --- a/arch/arm/plat-omap/iovmm.c +++ b/arch/arm/plat-omap/iovmm.c @@ -292,7 +292,7 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da, if (prev_end >= start) break; - if (start + bytes < tmp->da_start) + if (start + bytes <= tmp->da_start) goto found; if (flags & IOVMF_DA_ANON) -- 1.6.3.3