linux-kernel - Re: [PATCH v3 3/3] drm: bridge: anx78xx: Add anx78xx driver support.

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Message-ID: <CACvgo50ku9FZJU4YqdFsa6_=FqeDsq2UiCZkSVTLuTKsPRf7qw@mail.gmail.com>
Date:	Thu, 14 Apr 2016 15:06:27 +0100
From:	Emil Velikov <emil.l.velikov@...il.com>
To:	Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:	Thierry Reding <treding@...dia.com>,
	devicetree <devicetree@...r.kernel.org>,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
	ML dri-devel <dri-devel@...ts.freedesktop.org>,
	David Airlie <airlied@...ux.ie>,
	Rob Herring <robh+dt@...nel.org>,
	Daniel Kurtz <djkurtz@...omium.org>, drinkcat@...omium.org,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v3 3/3] drm: bridge: anx78xx: Add anx78xx driver support.

Hi Enric,

On 14 April 2016 at 14:42, Enric Balletbo i Serra
<enric.balletbo@...labora.com> wrote:
> The patch was implemented first without OR'ing error codes. The reason why I
> changed this is because I received the comments that checking the error on
> every regmap_* didn't help the readability of the driver and is likely to
> not fail if the first call doesn't fail.
>
> For example, originally the code was like this:
>   http://pastebin.com/rPgyji8k
> but I changed to this
>   http://pastebin.com/rPgyji8k
>
Both links are the same ;-) But I believe we all get what you meant.

Just a side note: many other drivers in DRM subsystem, inconsistently
check the return value of the regmap API. Note sure how likely is any
of it [regmap_foo] to fail and/or how determined people are to handle
every possible error case.

-Emil