linux-kernel - Re: [PATCH v4 4/9] driver core: Let dev_of

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Message-ID: <20190416132955.GB17483@kroah.com>
Date:   Tue, 16 Apr 2019 15:29:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Russell King <linux@...linux.org.uk>,
        Jeffrey Hugo <jhugo@...eaurora.org>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v4 4/9] driver core: Let dev_of_node() accept a NULL dev

On Fri, Apr 12, 2019 at 11:31:45AM -0700, Stephen Boyd wrote:
> We'd like to chain this in places where the 'dev' argument might be
> NULL. Let this function take a NULL 'dev' so this can work.
> 
> Cc: Miquel Raynal <miquel.raynal@...tlin.com>
> Cc: Jerome Brunet <jbrunet@...libre.com>
> Cc: Russell King <linux@...linux.org.uk>
> Cc: Michael Turquette <mturquette@...libre.com>
> Cc: Jeffrey Hugo <jhugo@...eaurora.org>
> Cc: Chen-Yu Tsai <wens@...e.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Rob Herring <robh@...nel.org>
> Signed-off-by: Stephen Boyd <sboyd@...nel.org>
> ---
> 
> Please ack/review so I can take this through clk tree.
> 
>  include/linux/device.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/linux/device.h b/include/linux/device.h
> index b425a7ee04ce..0370dd0b3ae7 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -1231,7 +1231,7 @@ static inline void device_lock_assert(struct device *dev)
>  
>  static inline struct device_node *dev_of_node(struct device *dev)
>  {
> -	if (!IS_ENABLED(CONFIG_OF))
> +	if (!IS_ENABLED(CONFIG_OF) || !dev)
>  		return NULL;
>  	return dev->of_node;
>  }

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>