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

From: Russell King - ARM Linux
Date: Wed Nov 02 2016 - 04:29:16 EST

On Wed, Nov 02, 2016 at 01:18:35AM +0000, Kuninori Morimoto wrote:
> + platform = platform_device_register_full(&pdevinfo);
> + if (IS_ERR_OR_NULL(platform))
> + return PTR_ERR(platform);

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.

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