linux-kernel - Re: [PATCH v2] drivers: gpio: sprd: use devm_platform_ioremap

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Date:   Tue, 12 Mar 2019 10:30:24 +0100
From:   "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
To:     Baolin Wang <baolin.wang@...aro.org>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v2] drivers: gpio: sprd: use
 devm_platform_ioremap_resource()

On 12.03.19 09:49, Baolin Wang wrote:

> I still do not think the new API is suitable for this case. Since we
> can have optional multiple IO resources, so the original code will not
> return errors if we did not get the IO resources, but we must cast
> errors if we failed to do ioremap. But you ignore the errors of
> ioremap, which is not good.

hmm, maybe we can differenciate on the error code ?

patch up devm_platform_ioremap_resource() so it returns -ENOENT if
there's no such resource defined. I suppose, ioremap() doesn't have
a valid case for -ENOENT (but haven't checked yet).


--mtx

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