From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755446AbbDTOyh (ORCPT ); Mon, 20 Apr 2015 10:54:37 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:34734 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753244AbbDTOyg (ORCPT ); Mon, 20 Apr 2015 10:54:36 -0400 Date: Mon, 20 Apr 2015 16:54:32 +0200 From: Greg Kroah-Hartman To: Jason Gunthorpe Cc: Russell King - ARM Linux , Jens Wiklander , valentin.manea@huawei.com, devicetree@vger.kernel.org, javier@javigon.com, emmanuel.michel@st.com, Herbert Xu , Arnd Bergmann , linux-kernel@vger.kernel.org, jean-michel.delorme@st.com, tpmdd-devel@lists.sourceforge.net, linux-arm-kernel@lists.infradead.org Subject: Re: [tpmdd-devel] [RFC PATCH 1/2] tee: generic TEE subsystem Message-ID: <20150420145432.GD7261@kroah.com> References: <1429257057-7935-1-git-send-email-jens.wiklander@linaro.org> <1429257057-7935-2-git-send-email-jens.wiklander@linaro.org> <20150417163054.GA28241@obsidianresearch.com> <20150418090147.GF12732@n2100.arm.linux.org.uk> <20150418172923.GA10605@obsidianresearch.com> <20150418215755.GM12732@n2100.arm.linux.org.uk> <20150420050800.GA12928@obsidianresearch.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150420050800.GA12928@obsidianresearch.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Apr 19, 2015 at 11:08:00PM -0600, Jason Gunthorpe wrote: > I still suspect the expected way to write a new mid layer is to create > your own struct device and not rely on misc_device, Yes, that is the way. You can not use misc_device for anything other than creating the char node that your driver can use through the fileops you pass to it. Do not use a misc_device to create sysfs files for, or anything else, it will be wrong and racy, as you have pointed out. thanks, greg k-h