Re: [PATCH v4 4/9] driver core: Let dev_of_node() accept a NULL dev

[Greg Kroah-Hartman]

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@xxxxxxxxxxx>
> Cc: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
> Cc: Russell King <linux@xxxxxxxxxxxxxxx>
> Cc: Michael Turquette <mturquette@xxxxxxxxxxxx>
> Cc: Jeffrey Hugo <jhugo@xxxxxxxxxxxxxx>
> Cc: Chen-Yu Tsai <wens@xxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Rob Herring <robh@xxxxxxxxxx>
> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
> ---
> 
> 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@xxxxxxxxxxxxxxxxxxx>