linux-kernel - Re: [PATCH V3 3/4] dmaselftest: add memcpy selftest support functions

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Date:	Mon, 9 Nov 2015 11:26:21 +0200
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Sinan Kaya <okaya@...eaurora.org>
Cc:	dmaengine <dmaengine@...r.kernel.org>, timur@...eaurora.org,
	cov@...eaurora.org, jcm@...hat.com,
	Andy Gross <agross@...eaurora.org>,
	linux-arm-msm@...r.kernel.org,
	linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V3 3/4] dmaselftest: add memcpy selftest support functions

On Mon, Nov 9, 2015 at 5:07 AM, Sinan Kaya <okaya@...eaurora.org> wrote:
>
>
> On 11/8/2015 3:09 PM, Andy Shevchenko wrote:
>>
>> On Sun, Nov 8, 2015 at 6:52 AM, Sinan Kaya <okaya@...eaurora.org> wrote:
>>>
>>> This patch adds supporting utility functions
>>> for selftest. The intention is to share the self
>>> test code between different drivers.
>>>
>>> Supported test cases include:
>>> 1. dma_map_single
>>> 2. streaming DMA
>>> 3. coherent DMA
>>> 4. scatter-gather DMA
>>
>>

>>> +       u32 i, j = 0;
>>
>> unsigned int
>
> why?

Is i or j is going to be used for HW communication? No? What about
assignment to a values of type u32? No? Plain counters? Use plain
types.

It's actually comment about your all patches I saw last week.

>>> +       int err = 0;
>>> +       int ret;
>>
>>
>> Any reason to have two instead of one of similar meaning?
>>
>
> removed ret

Don't forget to check if it's redundant assignment (check in all your
patches as well).

-- 
With Best Regards,
Andy Shevchenko
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