linux-kernel - Re: [PATCH v8 05/10] media: venus: adding core part and helper functions

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Date:   Fri, 5 May 2017 16:29:05 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Sakari Ailus <sakari.ailus@....fi>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Andy Gross <andy.gross@...aro.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v8 05/10] media: venus: adding core part and helper
 functions

Hi Bjorn

On 05/02/2017 09:52 PM, Bjorn Andersson wrote:
> On Tue 02 May 01:52 PDT 2017, Stanimir Varbanov wrote:
> 
>> Hei Sakari,
>>
>> On 04/30/2017 01:21 AM, Sakari Ailus wrote:
>>> Hi, Stan!!
>>>
>>> On Fri, Apr 28, 2017 at 12:13:52PM +0300, Stanimir Varbanov wrote:
>>> ...
>>>> +int helper_get_bufreq(struct venus_inst *inst, u32 type,
>>>> +		      struct hfi_buffer_requirements *req)
>>>> +{
>>>> +	u32 ptype = HFI_PROPERTY_CONFIG_BUFFER_REQUIREMENTS;
>>>> +	union hfi_get_property hprop;
>>>> +	int ret, i;
>>>
>>> unsigned int i ? It's an array index...
>>
>> Thanks for pointing that out, I have to revisit all similar places as
>> well ...
>>
> 
> It's perfectly fine to index an array with an int and you are comparing
> the index with a integer constant in the loop - so don't clutter the
> code unnecessarily.

I personally prefer unsigned for iterator variable type (because
unsigned type has defined behavior on overflow), but having the fact
that I'm comparing with int I will keep it int.

Also it seems that -Wsign-compare is not enabled by default in kernel,
no? So I have modified my Makefile and catch few occurrences of warnings
about signed with unsigned compare and fixed them.

-- 
regards,
Stan