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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 994F7C11F64 for ; Tue, 29 Jun 2021 02:39:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8042D611AE for ; Tue, 29 Jun 2021 02:39:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231805AbhF2Cl5 (ORCPT ); Mon, 28 Jun 2021 22:41:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:34256 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231753AbhF2Cly (ORCPT ); Mon, 28 Jun 2021 22:41:54 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B09FF611AE; Tue, 29 Jun 2021 02:39:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1624934367; bh=Dyd9/Nhc3m3DAKSguaNRbchrnYghDyF5usfG0Y3MA4s=; h=Date:From:To:Subject:In-Reply-To:From; b=WgziNQnU6o1WLIu3f2JEuaU+f7F5nucxizMqwx0ZRKSm4LS+N7ZW32tlk75msqGQY AqsmNUCDTr1eJaT/255WSLU+q50X4GqEcTZiCRJV7+ZXw15YLCxziatE+AUHt4w1s+ rjB2nDCY1EX1gKbFTlmY0iKKLLBuo3+9eSgd5ewM= Date: Mon, 28 Jun 2021 19:39:26 -0700 From: Andrew Morton To: akpm@linux-foundation.org, alexander.deucher@amd.com, david@redhat.com, dbueso@suse.de, geert@linux-m68k.org, ldufour@linux.ibm.com, Liam.Howlett@Oracle.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org Subject: [patch 117/192] drm/amdgpu: use vma_lookup() in amdgpu_ttm_tt_get_user_pages() Message-ID: <20210629023926.E8C85SCul%akpm@linux-foundation.org> In-Reply-To: <20210628193256.008961950a714730751c1423@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Liam Howlett Subject: drm/amdgpu: use vma_lookup() in amdgpu_ttm_tt_get_user_pages() Use vma_lookup() to find the VMA at a specific address. As vma_lookup() will return NULL if the address is not within any VMA, the start address no longer needs to be validated. Link: https://lkml.kernel.org/r/20210521174745.2219620-14-Liam.Howlett@Oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Laurent Dufour Acked-by: David Hildenbrand Acked-by: Davidlohr Bueso Acked-by: Alex Deucher Cc: Geert Uytterhoeven Signed-off-by: Andrew Morton --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c~drm-amdgpu-use-vma_lookup-in-amdgpu_ttm_tt_get_user_pages +++ a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -709,8 +709,8 @@ int amdgpu_ttm_tt_get_user_pages(struct } mmap_read_lock(mm); - vma = find_vma(mm, start); - if (unlikely(!vma || start < vma->vm_start)) { + vma = vma_lookup(mm, start); + if (unlikely(!vma)) { r = -EFAULT; goto out_unlock; } _