linux-kernel - Re: [PATCH] arm64: dma-mapping: check whether cma area is initialized or not

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Message-ID: <20150911110036.GC5771@e104818-lin.cambridge.arm.com>
Date:	Fri, 11 Sep 2015 12:00:37 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Jisheng Zhang <jszhang@...vell.com>
Cc:	will.deacon@....com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm64: dma-mapping: check whether cma area is
 initialized or not

On Fri, Sep 11, 2015 at 03:49:47PM +0800, Jisheng Zhang wrote:
> If CMA is turned on and CMA size is set to zero, kernel should
> behave as if CMA was not enabled at compile time.
> Every dma allocation should check existence of cma area
> before requesting memory.
> 
> Arm has done this by commit e464ef16c4f0 ("arm: dma-mapping: add
> checking cma area initialized"), also do this for arm64.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...vell.com>

Acked-by: Catalin Marinas <catalin.marinas@....com>

Will should pick this up for 4.3.

Thanks.

-- 
Catalin
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