linux-kernel - Re: [PATCH] checkpatch.pl: Allow '+' in compatible strings

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Date:   Wed, 15 Jul 2020 09:22:42 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Joe Perches <joe@...ches.com>, Andy Whitcroft <apw@...onical.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] checkpatch.pl: Allow '+' in compatible strings

On Tue, Jul 14, 2020 at 11:42:15AM -0600, Rob Herring wrote:
> On Tue, Jul 14, 2020 at 11:12 AM Joe Perches <joe@...ches.com> wrote:
> >
> > On Tue, 2020-07-14 at 10:21 -0600, Rob Herring wrote:
> > > On Tue, Jul 14, 2020 at 3:41 AM Thierry Reding <thierry.reding@...il.com> wrote:
> > > > From: Thierry Reding <treding@...dia.com>
> > > >
> > > > The current checks will interpret a '+' character as special because
> > > > they use regular expression matching. Escape the '+' character if it
> > > > appears in a compatible string.
> > >
> > > Ugg, looks like c6x really liked using '+'. Might need to be added in
> > > schema checks, too. Not sure offhand.
> >
> > These are the non alphanumeric characters used in .dts and .dtsi files
> > with 'compatible=' strings
> >
> > - 44115
> > , 32035
> > . 1131
> > _ 259
> > + 46
> > / 18
> > ) 5
> > ( 5
> >
> > So it looks like
> >
> >         "("
> >         ")"
> >
> > need to be added and escaped too
> >
> > ?
> 
> No, those are 'regulator-compatible' AFAICT which is something else
> and deprecated.

Looks like we do need to escape the '.' character as well, although it
should be mostly harmless if we don't since '.' in the regex would also
match a literal '.' in the compatible string.

Thierry

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