From patchwork Thu Dec 6 18:44:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souptick Joarder X-Patchwork-Id: 10716627 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 D3B4218B8 for ; Thu, 6 Dec 2018 18:40:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C33952F13D for ; Thu, 6 Dec 2018 18:40:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B7BBF2F15C; Thu, 6 Dec 2018 18:40:54 +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=ham 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 461CF2F13D for ; Thu, 6 Dec 2018 18:40:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725927AbeLFSkw (ORCPT ); Thu, 6 Dec 2018 13:40:52 -0500 Received: from mail-pg1-f195.google.com ([209.85.215.195]:39020 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725908AbeLFSkw (ORCPT ); Thu, 6 Dec 2018 13:40:52 -0500 Received: by mail-pg1-f195.google.com with SMTP id w6so521995pgl.6; Thu, 06 Dec 2018 10:40:51 -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=HbjeRliO+vM5aLRxbYChK+9NDy/qsrTu+jTUTd4ZwgM=; b=bG1t/h0G7HsmA8R+Dyhl/GxN0xwqpb0yRUvCY5ZAei4St/imeZmfW5xzHWeExs79G7 3ipntKMO3eRjL4zxGs7HpMj+sgWx8f7Gkhdo19zA8gGWXe9Xe+RQ9hP5SVTQLc8v6R1R 2eiOfvElsrx4gWkx12UCqMOmn3x3x3c1FdSh0sJm+U9096poTqhv72EonZtd1mNXGjBc 7Xawu+wvgf48R9y35/7UxQRHCqNgJbERrTZJrK5N+bL5DJP0YxfYek6wFkK+PV1wVxjf 2Zc2+79sZCqXcDhJGRPyZCa08FJ3rUFPZE1tU+sKxD+Pzfaek2tNq5FLPuk6ZjWdENPM dq3w== 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=HbjeRliO+vM5aLRxbYChK+9NDy/qsrTu+jTUTd4ZwgM=; b=ZGIAz2DkNekUu/b/uN2BS1EHz5xNbXV+gmKY8ah6NcgsRThkiDSVZVIhwHgnNAyNFe BDs0uhdu7gbjUq9qIbSX7s+jUUSzSuGGnyoYoTcWWVT1ATNxCGIfifLvyt/bgZrcI8np aQZudjoE1OpOb35agGH/KfdHMj2EuYaoEtoIk06oWhhFFrVXM9S42U6jESOUuHoyR10Y 7ezzzFL23PDBicoFvgUQvuuYFRnoIdAVnL8zi/BD5VyIPToTVkljdxQF2Gq44UY+mNMH CvOpeY8Pat5BqMppDEjkh3Ul28VKTw1POGURMUbRkDIMW9ZVS9rsvbZHuc2CTD/iEEuH HOgg== X-Gm-Message-State: AA+aEWZrEpCJTo1ohUrTID+pDQzEbTpM2udXCcq+087H80+nViG+j2fD xeSjrNzQPGBaGr5TgMDLpxY= X-Google-Smtp-Source: AFSGD/WLGphCOCPH36gfYZkaZrYNW1GtPiXDD9WUqhjHZb9vQUpQfm9+hBvkksnAYbZQwgNgM6d5hw== X-Received: by 2002:a65:6491:: with SMTP id e17mr24801379pgv.418.1544121651571; Thu, 06 Dec 2018 10:40:51 -0800 (PST) Received: from jordon-HP-15-Notebook-PC ([103.227.99.39]) by smtp.gmail.com with ESMTPSA id y6sm1602250pfd.104.2018.12.06.10.40.50 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 06 Dec 2018 10:40:50 -0800 (PST) Date: Fri, 7 Dec 2018 00:14:38 +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 Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v3 7/9] videobuf2/videobuf2-dma-sg.c: Convert to use vm_insert_range Message-ID: <20181206184438.GA31370@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.