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,URIBL_BLOCKED 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 C3C6DC433E6 for ; Thu, 14 Jan 2021 17:21:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9EDEB23B52 for ; Thu, 14 Jan 2021 17:21:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727319AbhANRUm (ORCPT ); Thu, 14 Jan 2021 12:20:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45486 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727278AbhANRUm (ORCPT ); Thu, 14 Jan 2021 12:20:42 -0500 Received: from mail-wr1-x429.google.com (mail-wr1-x429.google.com [IPv6:2a00:1450:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CA69C061757 for ; Thu, 14 Jan 2021 09:20:01 -0800 (PST) Received: by mail-wr1-x429.google.com with SMTP id q18so6619980wrn.1 for ; Thu, 14 Jan 2021 09:20:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=DJbxjVn7var5tn3VpXRQHFW70e7JzlJvTaQ/6D9kM2w=; b=UgLBzu91mErnuDHKJs9FPr89uRRZTzo+V1QmaGFwSnw3UnK2K9B1jbVrp0WxpBi0Iz L3B+/m2bqkqhjb+Y6d9NpgSKoXddFhktBLfKhTwRj8KIq4kBEnMetF9QL0QHVr6JiXFn mDdr8j331VBXi0UitN1w37vXjDVtSdhZWlugs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=DJbxjVn7var5tn3VpXRQHFW70e7JzlJvTaQ/6D9kM2w=; b=VniO5w8Tz8Hp/c57fno7udp96o8aw9W+CG6Ic4X2xoo9KnCLSyAxTQujxj8hYoHJhW jpILFaKcEZmMV0ANIsDIXdKjl2mV8QdyUqCsHOWTDdxT79IZiO86I7Wrr6FglvaXpjhV Wvy5+JZk+HXsCmQqCIT83QERg2gFg2oCFP6t7ofFpOFg4BlQg/ieImXdqgiICJkoiG1c Z2UChve8IN1UL9ZPQtTrDR4ZpmiHqPqay+R6aS9Ag80Dm4wqmfHkAfVntNkYX5D6r+4G M7QlF37eVC2/jJMwaYkGm2Yc0eRSYVExMgB017AdXUDKHKy2AXuyJ+MLOBzgmlf1o5Dw nSpg== X-Gm-Message-State: AOAM530g5DDGdXqJS0KDlc5YNp72wvJXGAAJzOjuGvkeqGrrs4Jpff0a Hs6yFtmgBbZfCwWuUcphSbHQqw== X-Google-Smtp-Source: ABdhPJxdULearBSGSGAvpATDOI4FDwr905+i5cFffKJphb+lGHN0mNDV5HrUNJuCrG9xygDc76r9Pw== X-Received: by 2002:adf:d1cb:: with SMTP id b11mr3297365wrd.118.1610644800457; Thu, 14 Jan 2021 09:20:00 -0800 (PST) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id w189sm9796925wmg.31.2021.01.14.09.19.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Jan 2021 09:19:59 -0800 (PST) Date: Thu, 14 Jan 2021 18:19:57 +0100 From: Daniel Vetter To: Thomas Zimmermann Cc: kieran.bingham+renesas@ideasonboard.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@linux.ie, daniel@ffwll.ch, eric@anholt.net, Linux-Renesas , Laurent Pinchart , dri-devel@lists.freedesktop.org Subject: Re: [PATCH 2/2] drm/cma-helper: Implement mmap as GEM CMA object functions Message-ID: References: <20201123115646.11004-1-tzimmermann@suse.de> <20201123115646.11004-3-tzimmermann@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Operating-System: Linux phenom 5.7.0-1-amd64 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org On Thu, Jan 14, 2021 at 02:26:41PM +0100, Thomas Zimmermann wrote: > From d0583fe22cd0cd29749ff679e46e13b58de325cb Mon Sep 17 00:00:00 2001 > From: Thomas Zimmermann > Date: Thu, 14 Jan 2021 14:21:51 +0100 > Subject: [PATCH] drm/cma: Set vma ops in mmap function > > Signed-off-by: Thomas Zimmermann > --- > drivers/gpu/drm/drm_gem_cma_helper.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c > index 7942cf05cd93..0bd192736169 100644 > --- a/drivers/gpu/drm/drm_gem_cma_helper.c > +++ b/drivers/gpu/drm/drm_gem_cma_helper.c > @@ -489,6 +489,8 @@ int drm_gem_cma_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) > struct drm_gem_cma_object *cma_obj; > int ret; > > + vma->vm_ops = obj->funcs->vm_ops; I think this should be done in core, otherwise we have tons of refcount leaks. I think this was an oversight when we've done that refactoring. Also drivers can easily overwrite this one if they really have to, but not assigned this is a clear bug. -Daniel > + > /* > * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(), and set the > * vm_pgoff (used as a fake buffer offset by DRM) to 0 as we want to map > -- > 2.29.2 > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch