linux-kernel - Re: serial driver cleanups v2

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Date:   Fri, 15 Mar 2019 19:41:14 +0100
From:   "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Eric Anholt <eric@...olt.net>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Tobias Klauser <tklauser@...tanz.ch>,
        Richard Genoud <richard.genoud@...il.com>,
        macro@...ux-mips.org,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>, slemieux.tyco@...il.com,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>, baohua@...nel.org,
        Peter Korsgaard <jacmet@...site.dk>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org,
        "open list:LINUX FOR POWERPC PA SEMI PWRFICIENT" 
        <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: serial driver cleanups v2

On 15.03.19 19:11, Andy Shevchenko wrote:

>> The actual goal is generalizing the whole iomem handling, so individual
>> usually just need to call some helpers that do most of the things.
>> Finally, I also wanted to have all io region information consolidated
>> in struct resource.
> 
> That's should be a selling point, not just conversion per se.

hmm, I never was good at selling :o

but I'll try anyways: it shall make the code smaller and easier to
read/understand.

does that count ?

> You have to explain that in each commit message, that the change does bring a
> possible new error message printed.

Ok, I wasn't aware of that. Yes, I missed to read the code of that
function carefully and didn't expect that it does more than just a dumb
wrapper around dev_ioremap() that picks out the params from struct
resource.

OTOH, the name, IMHO, is a bit misleading. Any chance of ever changing
it to a more clear name (eg. devm_request_and_ioremap_resource()) ?

> The performance side of the deal, you are lucky here, is not significant
> because it's slow path.

okay :)


--mtx

-- 
Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@...ux.net -- +49-151-27565287