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=-3.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 36B5BC4338F for ; Mon, 26 Jul 2021 04:06:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 209116056C for ; Mon, 26 Jul 2021 04:06:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231613AbhGZDZf (ORCPT ); Sun, 25 Jul 2021 23:25:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231603AbhGZDZe (ORCPT ); Sun, 25 Jul 2021 23:25:34 -0400 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48934C061760 for ; Sun, 25 Jul 2021 21:06:03 -0700 (PDT) Received: by mail-pj1-x1034.google.com with SMTP id l19so11246335pjz.0 for ; Sun, 25 Jul 2021 21:06:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=xiWitXT290UcByDjy4CV0WmRGLnUtUIPDLLBbCJ8IDc=; b=fUs5u9A2a5DivlQK6Sg0JrGLgJXIPYe7pwxwekbQfczrOF7C0jTUI5nUklETv0tNu6 s/9XO2ZgJPne3GLw52Jt8SKdnjFuSu5J2oH8fdnurwdaDQhs/RCRNSv4p5+4h5IVvzDs 9qu7clubgpT93TMnvfLV00Z4mqHgSOhzsimDA= 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=xiWitXT290UcByDjy4CV0WmRGLnUtUIPDLLBbCJ8IDc=; b=a1159wizhf/mxZ8BjXzBql2ap+/YVtUjoM8D3bMyuCMqT6NDSoANcCwuoVvvgrraxx a7iiJKuvdq2fvVnp8TjEHYNmNvDplyKik9ldw94I6kP9P8dPzal4JiZJaMNTNup4OgOm 0U87zouGADBC3A5jyItIC8hwmNKhXs6C4QT8pXZonOmvpLDO37bxiEGqmgpWQpe/yFIa 4QwO8CDp61XghS4IE0WgRBqkE1+3DrXqtwb2l7KZWZcVy6LJ9Irx0F0P/BfUWU71/UQp VzMm/NX06hbFWFp4j2cjsrI/Xnfkk8A31qqjwGSADDKJEQhOgfQBNxmO6c83XYDrd6ja AeDw== X-Gm-Message-State: AOAM531EQKa/kqRVvZGt0r0yo9m4MA5wqLvUHh92z8QaTSscVh70/dy1 6mNSPxNA1iOSFGD7t8xU3nXPvw== X-Google-Smtp-Source: ABdhPJxPpkDCVPhmtEpwxjcoHVvEIwaGFP4/ubAgNHcqzQYT+OQ4R0Q0rmcmuOVO4cs1HYPlIHNkiw== X-Received: by 2002:a63:1621:: with SMTP id w33mr16182815pgl.291.1627272362829; Sun, 25 Jul 2021 21:06:02 -0700 (PDT) Received: from google.com ([2409:10:2e40:5100:d699:4331:827:4150]) by smtp.gmail.com with ESMTPSA id r18sm2448184pgk.54.2021.07.25.21.05.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Jul 2021 21:06:02 -0700 (PDT) Date: Mon, 26 Jul 2021 13:05:57 +0900 From: Sergey Senozhatsky To: Dafna Hirschfeld Cc: Tomasz Figa , Hans Verkuil , Ricardo Ribalda , Christoph Hellwig , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Collabora Kernel ML , Sergey Senozhatsky Subject: Re: [PATCHv3 7/8] videobuf2: handle V4L2_MEMORY_FLAG_NON_COHERENT flag Message-ID: References: <20210709092027.1050834-1-senozhatsky@chromium.org> <20210709092027.1050834-8-senozhatsky@chromium.org> <0c89ef1e-8abb-8749-bbce-c7e5a2e2f304@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (21/07/26 10:40), Sergey Senozhatsky wrote: > On (21/07/22 19:33), Dafna Hirschfeld wrote: > [..] > > > int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req) > > > { > > > int ret = vb2_verify_memory_type(q, req->memory, req->type); > > > + u32 flags = req->flags; > > > fill_buf_caps(q, &req->capabilities); > > > - return ret ? ret : vb2_core_reqbufs(q, req->memory, 0, &req->count); > > > + validate_memory_flags(q, req->memory, &flags); > > > + req->flags = flags; > > > > you can do instead > > > > validate_memory_flags(q, req->memory, &req->flags); > > ->flags are u32 for create-bufs and u8 for reqi-bufs. So `*flags = ` > can write to ->reserved[] for req-bufs (if the value is huge enough). I guess ->flags can become u8 for both create-bufs and req-bufs. We had ->flags in both structs as u32, but then decided to leave some reserved[] space in req-bufs and switched to u8 there.