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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D17F8C433EF for ; Tue, 28 Jun 2022 02:21:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243778AbiF1CVr (ORCPT ); Mon, 27 Jun 2022 22:21:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243603AbiF1CVA (ORCPT ); Mon, 27 Jun 2022 22:21:00 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9EF324BED; Mon, 27 Jun 2022 19:20:22 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 55414B81C11; Tue, 28 Jun 2022 02:20:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6C61C34115; Tue, 28 Jun 2022 02:20:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1656382821; bh=Asz9ew2hFmI18bnYpVbWeSIOuLQ9FU4MX/wfshCkR5w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wm5qD/N3uSHISZ4abRUbRUHGlbp6c62EBG4ghbYADH1y0iqvooDAeYFKu/Z8xHajv O/ZOgu6IvwnB6w8oofFgvGBub5Zr6RPiv7OivKBznV4zq/J4jkiV6G7LvJ/X68gN2r qyyg1lE3bsqKR+K/IhuhYkGYqa9dT142qZwXaplHvhr3mxLjdx2RWa/G6eycCF+VKI OD3SSDc2tyubnptvlVVLa4Zb4XIDX9XoYpQFxJ/aqNp4Jl6kZyXactH5c0MlnGdY8v KmAI1V1sln3R00n6ZXBKb42phdZMC1rSbCowJ+57RxcYspLkdt8J1iEFw5CmPQL9up B9cKq3/Ukrs8w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Oleksandr Tyshchenko , Oleksandr Andrushchenko , Juergen Gross , Sasha Levin , airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, xen-devel@lists.xenproject.org Subject: [PATCH AUTOSEL 5.18 38/53] drm/xen: Add missing VM_DONTEXPAND flag in mmap callback Date: Mon, 27 Jun 2022 22:18:24 -0400 Message-Id: <20220628021839.594423-38-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220628021839.594423-1-sashal@kernel.org> References: <20220628021839.594423-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Oleksandr Tyshchenko [ Upstream commit ca6969013d13282b42cb5edcc13db731a08e0ad8 ] With Xen PV Display driver in use the "expected" VM_DONTEXPAND flag is not set (neither explicitly nor implicitly), so the driver hits the code path in drm_gem_mmap_obj() which triggers the WARNING. Signed-off-by: Oleksandr Tyshchenko Reviewed-by: Oleksandr Andrushchenko Link: https://lore.kernel.org/r/1652104303-5098-1-git-send-email-olekstysh@gmail.com Signed-off-by: Juergen Gross Signed-off-by: Sasha Levin --- drivers/gpu/drm/xen/xen_drm_front_gem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c index 5a5bf4e5b717..e31554d7139f 100644 --- a/drivers/gpu/drm/xen/xen_drm_front_gem.c +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c @@ -71,7 +71,7 @@ static int xen_drm_front_gem_object_mmap(struct drm_gem_object *gem_obj, * the whole buffer. */ vma->vm_flags &= ~VM_PFNMAP; - vma->vm_flags |= VM_MIXEDMAP; + vma->vm_flags |= VM_MIXEDMAP | VM_DONTEXPAND; vma->vm_pgoff = 0; /* -- 2.35.1