linux-kernel - Re: [PATCH resent] clk: at91: sama7g5: Add two jump labels in sama7g5_pmc

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Date:   Wed, 29 Mar 2023 00:02:59 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Markus Elfring <Markus.Elfring@....de>
Cc:     Nicolas Ferre <nicolas.ferre@...rochip.com>,
        kernel-janitors@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, cocci@...ia.fr,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH resent] clk: at91: sama7g5: Add two jump labels in
 sama7g5_pmc_setup()

On 28/03/2023 21:24:00+0200, Markus Elfring wrote:
> >> The label “err_free” was used to jump to another pointer check despite of
> >> the detail in the implementation of the function “sama7g5_pmc_setup”
> >> that it was determined already that the corresponding variable contained
> >> a null pointer (because of a failed memory allocation).
> >>
> >> * Thus use additional labels.
> >>
> >> * Delete an extra pointer check at the end which became unnecessary
> >>    with this refactoring.
> >>
> >> This issue was detected by using the Coccinelle software.
> >
> > Fine, but I'm sorry that it complexity the function for no real value.
> 
> Under which circumstances can advice be taken better into account
> also from another information source?
> https://wiki.sei.cmu.edu/confluence/display/c/MEM12-C.+Consider+using+a+goto+chain+when+leaving+a+function+on+error+when+using+and+releasing+resources#MEM12C.Considerusingagotochainwhenleavingafunctiononerrorwhenusingandreleasingresources-CompliantSolution%28POSIX,GotoChain%29
> 
> 
> 
> > Other clk drivers have the same pattern so I want them to all stay the same.
> > This is a NACK, sorry about that.
> 
> I am curious if other contributors (or code reviewers) would like to influence
> the software situation a bit more.
> 

I agree with Nicolas here, this is useless churn.


-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com