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

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Message-ID: <20190122160857.GD21349@kroah.com>
Date:   Tue, 22 Jan 2019 17:08:57 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Mark Brown <broonie@...nel.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 03:56:06PM +0000, Mark Brown wrote:
> On Tue, Jan 22, 2019 at 04:21:06PM +0100, Greg Kroah-Hartman wrote:
> > When calling debugfs functions, there is no need to ever check the
> > return value.  The function can work or not, but the code logic should
> > never do something different based on this.
> 
> 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.

thanks,

greg k-h