linux-kernel - Re: [PATCH] regmap: no need to check return value of debugfs

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Message-ID: <20190122163826.GC7579@sirena.org.uk>
Date:   Tue, 22 Jan 2019 16:38:26 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH] regmap: no need to check return value of debugfs_create
 functions

On Tue, Jan 22, 2019 at 05:08:57PM +0100, Greg Kroah-Hartman wrote:
> On Tue, Jan 22, 2019 at 03:56:06PM +0000, Mark Brown wrote:

> > Given that all the rest of the function is doing is further debugfs
> > operations and when it fails people trying to use the debugfs do welcome
> > some diagnostics I'm not sure that's particularly helpful.

> The only way it will fail is if we are out of memory.  And you are in a
> bigger mess then, no one cares about debugfs calls, just make them and
> move on, you should never care about the result of such a call.

No, it also fails if there's already something with the same name in
debugfs which can happen as as a result of configuration.  This gets
confusing for users, they see the debugfs files they're expecting but
the contents don't match up at all.

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