From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <clemens@ladisch.de>
Received: from smtprelay05.ispgateway.de (smtprelay05.ispgateway.de
 [80.67.31.97]) by ozlabs.org (Postfix) with ESMTP id 6D9D1B6EE6
 for <linuxppc-dev@lists.ozlabs.org>; Fri, 29 Jun 2012 21:17:47 +1000 (EST)
Message-ID: <4FED8D03.10507@ladisch.de>
Date: Fri, 29 Jun 2012 13:09:55 +0200
From: Clemens Ladisch <clemens@ladisch.de>
MIME-Version: 1.0
To: Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: [PATCH] common: dma-mapping: add support for generic dma_mmap_*
 calls
References: <1339741135-7841-1-git-send-email-m.szyprowski@samsung.com>
In-Reply-To: <1339741135-7841-1-git-send-email-m.szyprowski@samsung.com>
Content-Type: text/plain; charset=us-ascii
Cc: linux-arch@vger.kernel.org,
 Russell King - ARM Linux <linux@arm.linux.org.uk>,
 Arnd Bergmann <arnd@arndb.de>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
 Subash Patel <subash.ramaswamy@linaro.org>, linux-kernel@vger.kernel.org,
 linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org,
 Kyungmin Park <kyungmin.park@samsung.com>, linuxppc-dev@lists.ozlabs.org,
 Sumit Semwal <sumit.semwal@linaro.org>, linux-arm-kernel@lists.infradead.org,
 David Gibson <david@gibson.dropbear.id.au>
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org>
List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>
List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/>
List-Post: <mailto:linuxppc-dev@lists.ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>
List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>

Marek Szyprowski wrote:
> +++ b/drivers/base/dma-mapping.c
> ...
> +int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
> +		    void *cpu_addr, dma_addr_t dma_addr, size_t size)
> +{
> +	int ret = -ENXIO;
> +	...
> +	if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
> +		return ret;

This will return -ENXIO if dma_mmap_from_coherent() succeeds.


Regards,
Clemens