linux-kernel - Re: [Linaro-acpi] [V2 PATCH 2/5] arm64 : Introduce support for ACPI

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Date:	Tue, 5 May 2015 11:13:59 -0500
From:	Suravee Suthikulanit <suravee.suthikulpanit@....com>
To:	Arnd Bergmann <arnd@...db.de>, <linaro-acpi@...ts.linaro.org>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<herbert@...dor.apana.org.au>, <catalin.marinas@....com>,
	<rjw@...ysocki.net>, <linux-kernel@...r.kernel.org>,
	<will.deacon@....com>, <linux-crypto@...r.kernel.org>,
	<linux-acpi@...r.kernel.org>, <netdev@...r.kernel.org>,
	<davem@...emloft.net>, <lenb@...nel.org>
Subject: Re: [Linaro-acpi] [V2 PATCH 2/5] arm64 : Introduce support for ACPI
 _CCA object

On 5/5/2015 11:12 AM, Arnd Bergmann wrote:
> On Tuesday 05 May 2015 11:09:38 Suravee Suthikulanit wrote:
>>
>> However, codes in several places are making use of dma_map_ops without
>> checking if the ops are NULL (i.e.
>> include/asm-generic/dma-mapping-common.h and in arch-specific
>> implementation). If setting it to NULL is what we are planning to
>> support, we would need to scrub the current code to put NULL check.
>> Also, would you consider if that is safe to do going forward?
>>
>>
>
> I mean the dma_mask pointer, not dma_map_ops.
>
> 	Arnd
>

Ah, got it. Sorry for confusion.

Suravee

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