linux-kernel - Re: net-libertas: Better exception handling in if_spi_host_to_card

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Date:	Sun, 3 Jan 2016 13:13:15 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Arend van Spriel <aspriel@...il.com>
Cc:	Julia Lawall <julia.lawall@...6.fr>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	libertas-dev@...ts.infradead.org, linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org, Kalle Valo <kvalo@...eaurora.org>,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: net-libertas: Better exception handling in
 if_spi_host_to_card_worker()

>>> What the patch tries to do is avoid the extra 'if (err)'.
>>
>> Yes. - I propose to look at related consequences together with the usage
>> of a popular short jump label once more.
> 
> When I read a subject saying "Better exception handling" it sounds like
> a functional improvement. Your change does not change anything
> functionally and may or may not save a bit of execution time depending
> on how smart the compiler is.

Can it eventually matter to skip another condition check in three cases?


> What you change does is confuse people reading the code.

A few software developers might find this proposal unusual.


> So please explain why your update improves exception handling here.
> I don't see it.

How does this feedback fit to the mentioned check avoidance?


> The code is not making the driver more robust against failures

That's true for this update suggestion.


> in this function, which is what I think of reading "better exception handling".

Other implementation details are affected by the shown fine-tuning.

Regards,
Markus
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