linux-kernel - Re: [PATCH 1/4] regmap: sdw: move to -EOPNOTSUPP

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Message-ID: <6f7e5830-4dd8-1ecc-20c3-df75bc9ef265@linux.intel.com>
Date:   Tue, 25 Aug 2020 17:08:55 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        tiwai@...e.de, vkoul@...nel.org, gregkh@...uxfoundation.org,
        jank@...ence.com, srinivas.kandagatla@...aro.org,
        slawomir.blauciak@...el.com,
        Bard liao <yung-chuan.liao@...ux.intel.com>,
        Rander Wang <rander.wang@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Hui Wang <hui.wang@...onical.com>,
        Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH 1/4] regmap: sdw: move to -EOPNOTSUPP


>> -ENOTSUPP is not a valid error code, use recommended value instead.
> 
> What makes you say this - it's what regmap uses internally for
> unsupported operations?

This was flagged by scripts/checkpatch.pl (must be a new addition).

# ENOTSUPP is not a standard error code and should be avoided in new 
patches.
# Folks usually mean EOPNOTSUPP (also called ENOTSUP), when they type 
ENOTSUPP.
# Similarly to ENOSYS warning a small number of false positives is expected.
		if (!$file && $line =~ /\bENOTSUPP\b/) {
			if (WARN("ENOTSUPP",
				 "ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP\n" . 
$herecurr) &&
			    $fix) {
				$fixed[$fixlinenr] =~ s/\bENOTSUPP\b/EOPNOTSUPP/;
			}
		}

I was just blindly making checkpatch happy and tried to keep 
regmap-sdw.c and regmap-sdw-mbq aligned.