netdev - Re: [PATCH net-next] mdio_bus: Remove unneeded gpiod NULL check

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Message-ID: <f4cdcb4b-feac-5106-8068-e694dbd3b4e6@cogentembedded.com>
Date:   Tue, 18 Jul 2017 15:48:52 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Fabio Estevam <festevam@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Fabio Estevam <fabio.estevam@....com>
Subject: Re: [PATCH net-next] mdio_bus: Remove unneeded gpiod NULL check

On 07/18/2017 03:39 PM, Fabio Estevam wrote:

>>    Won't this result in kernel WARNING when GPIO is disabled?

    GPIO support, I was going to type...

> Not sure if I understood your point, but gpiod_set_value_cansleep() is
> a no-op when the gpiod is NULL.

    Look at the stub in <linux/gpio/consumer.h>, it has WARN_ON(1).

MBR, Sergei