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

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Message-ID: <5687B2BC.8090901@users.sourceforge.net>
Date:	Sat, 2 Jan 2016 12:21:32 +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()

> I have never seen much evolution going on in this area.

I can get an other impression from a specific document for example.
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/log/Documentation/CodingStyle

> 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.

> Setting coding style aside, the question is whether there is
> a good metric for the patch.

A software development challenge is to accept changes also around a topic
like "error handling". My update suggestion for the source file
"drivers/net/wireless/marvell/libertas/if_spi.c" should only improve
exception handling. (I came along other source files where more improvements
will eventually be possible.)

When will the run-time behaviour matter also for exceptional situations?

> Did you look at the resulting assembly code for different target architectures?

Not yet. - Which execution system variants would you recommend for
further comparisons?

Regards,
Markus
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