netdev - Re: [PATCH 0/7 v2] net: Fix platform_get

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Date:   Tue, 5 Dec 2017 15:32:15 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        wg@...ndegger.com, mkl@...gutronix.de, michal.simek@...inx.com,
        opendmb@...il.com, f.fainelli@...il.com, davem@...emloft.net
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH 0/7 v2] net: Fix platform_get_irq's error checking

Hi Sergei,


On Tuesday 05 December 2017 03:27 PM, Sergei Shtylyov wrote:
> On 12/5/2017 12:54 PM, Sergei Shtylyov wrote:
>
>>> The platform_get_irq() function returns negative number if an error
>>> occurs, Zero if No irq is found and positive number if irq gets 
>>> successful.
>>
>>     No, returning 0 is not a failure indication anymore! It used to 
>> be but not any longer...
>
>    And I fixed this function exactly to avoid overly complex error 
> checks (which you're trying to propose here).
>
Thanks for your comment. yes you are right. Now It'll not return 0. It 
will return irq and error as negative.
I will not add a check for 0.
>>> platform_get_irq() error checking for only zero is not correct.
>>
>> [...]
>
> MBR, Sergei
Thank you,
~arvind