{"id":816403,"url":"http://patchwork.ozlabs.org/api/patches/816403/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20170920185956.13874-7-wsa+renesas@sang-engineering.com/","project":{"id":35,"url":"http://patchwork.ozlabs.org/api/projects/35/?format=json","name":"Linux I2C development","link_name":"linux-i2c","list_id":"linux-i2c.vger.kernel.org","list_email":"linux-i2c@vger.kernel.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20170920185956.13874-7-wsa+renesas@sang-engineering.com>","list_archive_url":null,"date":"2017-09-20T18:59:56","name":"[RFC,v5,6/6] i2c: dev: mark RDWR buffers as DMA_SAFE","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"27eb04aa02d3ba9efa546657330c75eefe47706f","submitter":{"id":69646,"url":"http://patchwork.ozlabs.org/api/people/69646/?format=json","name":"Wolfram Sang","email":"wsa+renesas@sang-engineering.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20170920185956.13874-7-wsa+renesas@sang-engineering.com/mbox/","series":[{"id":4199,"url":"http://patchwork.ozlabs.org/api/series/4199/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-i2c/list/?series=4199","date":"2017-09-20T18:59:56","name":"i2c: document DMA handling and add helpers for it","version":5,"mbox":"http://patchwork.ozlabs.org/series/4199/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/816403/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/816403/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=linux-i2c-owner@vger.kernel.org;\n\treceiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xy8Fy1mfRz9sNr\n\tfor ;\n\tThu, 21 Sep 2017 05:00:38 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751772AbdITTAV (ORCPT );\n\tWed, 20 Sep 2017 15:00:21 -0400","from sauhun.de ([88.99.104.3]:38850 \"EHLO pokefinder.org\"\n\trhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP\n\tid S1751606AbdITTAG (ORCPT );\n\tWed, 20 Sep 2017 15:00:06 -0400","from localhost (p54B332E6.dip0.t-ipconnect.de [84.179.50.230])\n\tby pokefinder.org (Postfix) with ESMTPSA id 9A2622C43AA;\n\tWed, 20 Sep 2017 21:00:04 +0200 (CEST)"],"From":"Wolfram Sang ","To":"linux-i2c@vger.kernel.org","Cc":"linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,\n\tlinux-iio@vger.kernel.org, linux-input@vger.kernel.org,\n\tlinux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,\n\tWolfram Sang ","Subject":"[RFC PATCH v5 6/6] i2c: dev: mark RDWR buffers as DMA_SAFE","Date":"Wed, 20 Sep 2017 20:59:56 +0200","Message-Id":"<20170920185956.13874-7-wsa+renesas@sang-engineering.com>","X-Mailer":"git-send-email 2.11.0","In-Reply-To":"<20170920185956.13874-1-wsa+renesas@sang-engineering.com>","References":"<20170920185956.13874-1-wsa+renesas@sang-engineering.com>","Sender":"linux-i2c-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"linux-i2c@vger.kernel.org"},"content":"Signed-off-by: Wolfram Sang \n---\n drivers/i2c/i2c-dev.c | 2 ++\n 1 file changed, 2 insertions(+)","diff":"diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c\nindex 6f638bbc922db4..bbc7aadb4c899d 100644\n--- a/drivers/i2c/i2c-dev.c\n+++ b/drivers/i2c/i2c-dev.c\n@@ -280,6 +280,8 @@ static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client,\n \t\t\tres = PTR_ERR(rdwr_pa[i].buf);\n \t\t\tbreak;\n \t\t}\n+\t\t/* memdup_user allocates with GFP_KERNEL, so DMA is ok */\n+\t\trdwr_pa[i].flags |= I2C_M_DMA_SAFE;\n \n \t\t/*\n \t\t * If the message length is received from the slave (similar\n","prefixes":["RFC","v5","6/6"]}