linux-kernel - Re: [PATCH] common: dma-mapping: add support for generic dma_mmap

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Message-ID: <4FED8D03.10507@ladisch.de>
Date:	Fri, 29 Jun 2012 13:09:55 +0200
From:	Clemens Ladisch <clemens@...isch.de>
To:	Marek Szyprowski <m.szyprowski@...sung.com>
CC:	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, linaro-mm-sig@...ts.linaro.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Arnd Bergmann <arnd@...db.de>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	David Gibson <david@...son.dropbear.id.au>,
	Subash Patel <subash.ramaswamy@...aro.org>,
	Sumit Semwal <sumit.semwal@...aro.org>
Subject: Re: [PATCH] common: dma-mapping: add support for generic dma_mmap_*
 calls

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
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