linux-kernel - Re: [PATCH RFT RESEND linux-next] mips: dma-mapping: support debug_dma_mapping

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Message-ID: <508B0F4B.80601@gmail.com>
Date:	Fri, 26 Oct 2012 15:31:39 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	shuah.khan@...com
CC:	ralf@...ux-mips.org, kyungmin.park@...sung.com, arnd@...db.de,
	andrzej.p@...sung.com, m.szyprowski@...sung.com,
	linux-mips@...ux-mips.org, LKML <linux-kernel@...r.kernel.org>,
	shuahkhan@...il.com
Subject: Re: [PATCH RFT RESEND linux-next] mips: dma-mapping: support debug_dma_mapping_error

On 10/26/2012 02:51 PM, Shuah Khan wrote:

>>>> On 10/26/2012 09:01 AM, Shuah Khan wrote:
>>>>> Add support for debug_dma_mapping_error() call to avoid warning from
>>>>> debug_dma_unmap() interface when it checks for mapping error checked
>>>>> status. Without this patch, device driver failed to check map error
>>>>> warning is generated.

I'm confused.

Your claim that a 'warning is generated' seems to be in conflict with...


[...]
> Got it. Thanks. I would volunteer to look at fixing all the problems,
> but unfortunately I don't have a MIPS box handy

This statement that you don't have hardware that exhibits the problem.

How was the patch tested?  How do you even know there is a problem?

David Daney


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