linux-kernel - Re: [PATCH v2 20/25] tty: serial: samsung_tty: Use devm_ioremap

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Date:   Mon, 15 Feb 2021 19:51:35 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Hector Martin <marcan@...can.st>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Marc Zyngier <maz@...nel.org>, Rob Herring <robh@...nel.org>,
        Arnd Bergmann <arnd@...nel.org>,
        Olof Johansson <olof@...om.net>,
        Mark Kettenis <mark.kettenis@...all.nl>,
        Tony Lindgren <tony@...mide.com>,
        Mohamed Mediouni <mohamed.mediouni@...amail.com>,
        Stan Skowronek <stan@...ellium.com>,
        Alexander Graf <graf@...zon.com>,
        Will Deacon <will@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 20/25] tty: serial: samsung_tty: Use
 devm_ioremap_resource

On Mon, Feb 15, 2021 at 09:17:08PM +0900, Hector Martin wrote:
> This picks up the non-posted I/O mode needed for Apple platforms to
> work properly.
> 
> This removes the request/release functions, which are no longer
> necessary, since devm_ioremap_resource takes care of that already. Most
> other drivers already do it this way, anyway.
> 
> Also fix a bug checking the return value, which should use IS_ERR().

No, no, no. We never, never combine fixing bugs with some rework.
However devm_ioremap() returns NULL so where is the error?

Did you test your patches on existing platforms? If not, please mark all
of them as RFT on next submission, so Greg does not pick them too fast.

Best regards,
Krzysztof