From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964826AbbELWmV (ORCPT ); Tue, 12 May 2015 18:42:21 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:33785 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933868AbbELWmR (ORCPT ); Tue, 12 May 2015 18:42:17 -0400 Date: Tue, 12 May 2015 15:42:16 -0700 From: Greg KH To: Sumit Semwal Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-arm-kernel@lists.infradead.org, rmk+kernel@arm.linux.org.uk, airlied@linux.ie, kgene@kernel.org, thierry.reding@gmail.com, pawel@osciak.com, m.szyprowski@samsung.com, mchehab@osg.samsung.com, linaro-kernel@lists.linaro.org, robdclark@gmail.com, daniel@ffwll.ch Subject: Re: [PATCH v3] dma-buf: add ref counting for module as exporter Message-ID: <20150512224216.GA16712@kroah.com> References: <1431092563-19799-1-git-send-email-sumit.semwal@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1431092563-19799-1-git-send-email-sumit.semwal@linaro.org> 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 Fri, May 08, 2015 at 07:12:43PM +0530, Sumit Semwal wrote: > Add reference counting on a kernel module that exports dma-buf and > implements its operations. This prevents the module from being unloaded > while DMABUF file is in use. > > The original patch [1] was submitted by Tomasz Stanislawski, but this > is a simpler way to do it. > > v3: call module_put() as late as possible, per gregkh's comment. > v2: move owner to struct dma_buf, and use DEFINE_DMA_BUF_EXPORT_INFO > macro to simplify the change. > > Signed-off-by: Sumit Semwal > > [1]: https://lkml.org/lkml/2012/8/8/163 > --- > drivers/dma-buf/dma-buf.c | 10 +++++++++- > include/linux/dma-buf.h | 10 ++++++++-- > 2 files changed, 17 insertions(+), 3 deletions(-) Acked-by: Greg Kroah-Hartman