From patchwork Mon Dec 24 13:26:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souptick Joarder X-Patchwork-Id: 10742281 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 13A3114E2 for ; Mon, 24 Dec 2018 13:23:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 03F3228AAF for ; Mon, 24 Dec 2018 13:23:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EC1DE28AD4; Mon, 24 Dec 2018 13:23:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E88F28AAF for ; Mon, 24 Dec 2018 13:23:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725616AbeLXNXI (ORCPT ); Mon, 24 Dec 2018 08:23:08 -0500 Received: from mail-pl1-f195.google.com ([209.85.214.195]:46481 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725385AbeLXNXH (ORCPT ); Mon, 24 Dec 2018 08:23:07 -0500 Received: by mail-pl1-f195.google.com with SMTP id t13so5582885ply.13; Mon, 24 Dec 2018 05:23:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=7Lxrxd/hSsekQvS5TNwgf4HJhjrgrc3uztzkOk3jJZI=; b=OUe2UBaIajVgiHJLICEiDaRmhg9kLK9hiO8qJEaN4rrxoH7k50qgnl6Wl+XySZ6A83 K1F8jaG9lYHSpu0zG42YwEpn+3YVl83fnNiLu4sAHKartC0Io7zN3jOBUYys/J2s1DAZ b0PemUtLvUPsZJ5WxS7a2Km1y+FbdYwd8Vqu1nOnq7zc0AYFm2cvML/bPUIVJE6z7kYI AarkWAB0WEA5VKCBss7dFq5ZPZq2mCmrnovbMMEXL5zRYsntVdEdUqvwab2ix4w5+GaZ lufgucxKqEtCZUxR5YLGIYS/gi5CtHr7q3PFICiRvdOSX2NGp352oE4H40jHM582Ec4m GYGg== 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:mime-version :content-disposition:user-agent; bh=7Lxrxd/hSsekQvS5TNwgf4HJhjrgrc3uztzkOk3jJZI=; b=PCucv21HikOWUUaRvnY/vdeZrPYEEbOwhYn3gPGq17Dp56cmLiMoCDt6VcpW//9YTB pxyGlTp7FcvjmmvsbPP/68SF/nG2Hb4AGGky3UE6cCL2zGywwCTU7iXRBq8mNcfN1wLW 8WRWQw1bjXyTx/QAsASDiY4JsnMe4GDRQV7Ir0nmaCMz30f6Mq9s2KwUOr/+562g9ZEK FpF+AKTCR9yWVsZ+Otz2LIATEHmaB6Lm5M5KwV0EMgkQb6dT+joUhYFUZ2nhzWAb5g1c YHLlmrWPRtJunO3/tCBDPQaMXxRHtHTsIEwQ0UBawpN+bybYGoM65HS8J+/94HgN8AAc CG1g== X-Gm-Message-State: AJcUukdr4lEFqaAN14kxDwrbIFf+sxXF9Xlqs1G9N6Z9ymTESXP16Bfk AFf4gM2z8b/SUYO/VaMOgN0= X-Google-Smtp-Source: ALg8bN5kc/0nicwedA6pXaMV79OMWDwnVCptGPVVG8nZTTXxzJdQVTtTwoK88u8a5GB5BsbXczYDpg== X-Received: by 2002:a17:902:4401:: with SMTP id k1mr13003110pld.307.1545657786489; Mon, 24 Dec 2018 05:23:06 -0800 (PST) Received: from jordon-HP-15-Notebook-PC ([106.51.18.181]) by smtp.gmail.com with ESMTPSA id x3sm101409071pgt.45.2018.12.24.05.23.05 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 24 Dec 2018 05:23:05 -0800 (PST) Date: Mon, 24 Dec 2018 18:56:58 +0530 From: Souptick Joarder To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, pawel@osciak.com, m.szyprowski@samsung.com, kyungmin.park@samsung.com, mchehab@kernel.org, linux@armlinux.org.uk, robin.murphy@arm.com Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v5 7/9] videobuf2/videobuf2-dma-sg.c: Convert to use vm_insert_range Message-ID: <20181224132658.GA22166@jordon-HP-15-Notebook-PC> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Convert to use vm_insert_range to map range of kernel memory to user vma. Signed-off-by: Souptick Joarder Reviewed-by: Matthew Wilcox Acked-by: Marek Szyprowski Acked-by: Mauro Carvalho Chehab --- drivers/media/common/videobuf2/videobuf2-dma-sg.c | 23 +++++++---------------- 1 file changed, 7 insertions(+), 16 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index 015e737..898adef 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -328,28 +328,19 @@ static unsigned int vb2_dma_sg_num_users(void *buf_priv) static int vb2_dma_sg_mmap(void *buf_priv, struct vm_area_struct *vma) { struct vb2_dma_sg_buf *buf = buf_priv; - unsigned long uaddr = vma->vm_start; - unsigned long usize = vma->vm_end - vma->vm_start; - int i = 0; + unsigned long page_count = vma_pages(vma); + int err; if (!buf) { printk(KERN_ERR "No memory to map\n"); return -EINVAL; } - do { - int ret; - - ret = vm_insert_page(vma, uaddr, buf->pages[i++]); - if (ret) { - printk(KERN_ERR "Remapping memory, error: %d\n", ret); - return ret; - } - - uaddr += PAGE_SIZE; - usize -= PAGE_SIZE; - } while (usize > 0); - + err = vm_insert_range(vma, vma->vm_start, buf->pages, page_count); + if (err) { + printk(KERN_ERR "Remapping memory, error: %d\n", err); + return err; + } /* * Use common vm_area operations to track buffer refcount.