linux-kernel - Re: [RFC PATCH 2/2] i2c: mux: pca954x: verify the device id of the pca984x chips

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Message-ID: <20180305155303.i4zut6wtwckdes7z@ninjato>
Date:   Mon, 5 Mar 2018 16:53:04 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Peter Rosin <peda@...ntia.se>
Cc:     Adrian Fiergolski <adrian.fiergolski@...n.ch>,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/2] i2c: mux: pca954x: verify the device id of the
 pca984x chips


> @@ -97,59 +98,83 @@ static const struct chip_desc chips[] = {
>  		.nchans = 2,
>  		.enable = 0x4,
>  		.muxtype = pca954x_ismux,
> +		.id = { .manufacturer_id = I2C_DEVICE_ID_NONE },

Can't we just leave this empty and add a NULL pointer check below when
testing for the device id?


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