linux-kernel - Re: [PATCH 9/9] drm/nouveau/kms/nvd9-: Add CRC support

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Date:   Wed, 18 Mar 2020 07:02:54 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Lyude Paul <lyude@...hat.com>
Cc:     nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        Ben Skeggs <bskeggs@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Sam Ravnborg <sam@...nborg.org>,
        Alex Deucher <alexander.deucher@....com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Ilia Mirkin <imirkin@...m.mit.edu>,
        Sean Paul <seanpaul@...omium.org>,
        Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@...el.com>,
        Takashi Iwai <tiwai@...e.de>,
        Jani Nikula <jani.nikula@...el.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 9/9] drm/nouveau/kms/nvd9-: Add CRC support

On Tue, Mar 17, 2020 at 08:41:06PM -0400, Lyude Paul wrote:
> +	root = debugfs_create_dir("nv_crc", crtc->debugfs_entry);
> +	if (IS_ERR(root))
> +		return PTR_ERR(root);

No need to check this, just take the return value and move on.

> +
> +	dent = debugfs_create_file("flip_threshold", 0644, root, head,
> +				   &nv50_crc_flip_threshold_fops);
> +	if (IS_ERR(dent))
> +		return PTR_ERR(dent);

No need to check this either, in fact this test is incorrect :(

Just make the call, and move on.  See the loads of debugfs cleanups I
have been doing for examples.

thanks,

greg k-h