linux-kernel - Re: [PATCH v3] drm: bridge: add DesignWare HDMI I2S audio support

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Date:   Tue, 8 Nov 2016 00:20:57 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
CC:     Archit Taneja <architt@...eaurora.org>,
        Mark Brown <broonie@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Fabio Estevam <fabio.estevam@...escale.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Koji Matsuoka <koji.matsuoka.xm@...esas.com>,
        Thierry Reding <treding@...dia.com>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Simon <horms@...ge.net.au>, <linux-renesas-soc@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        Jose Abreu <joabreu@...opsys.com>
Subject: Re: [PATCH v3] drm: bridge: add DesignWare HDMI I2S audio support


Hi Russell

> > > This is wrong.  If platform is NULL, PTR_ERR() will return zero, which
> > > will be interpreted as success.  Please, avoid using IS_ERR_OR_NULL(),
> > > it leads to exactly this kind of cockup - and it's unnecessary here
> > > because platform_device_register_full() does not return NULL.
> > 
> > Thank you for your feedback.
> > Before sending v4 patch, I would like to confirm. Do you meand this ?
> > # use IS_ERR() instead of IS_ERR_OR_NULL()
> > 
> > 	platform = platform_device_register_full(&pdevinfo);
> > 	if (IS_ERR(platform))
> > 		return PTR_ERR(platform);
> 
> Yes, that's exactly correct.

Thanks !
I will send v4 patch

Best regards
---
Kuninori Morimoto