Subject: Re: [PATCH] mtd: rawnand: brcmnand: Fix sparse warning in has_flash_dma()

From: Miquel Raynal <[email-masked]>
Date: Sat, 19 Oct 2019 11:39:00 +0200

Hi Florian,

Florian Fainelli <[email-masked]> wrote on Fri, 18 Oct 2019
16:38:44 -0700:

> Sparse rightfully complained about has_flash_dma():
> +drivers/mtd/nand/brcmnand/brcmnand.c:951:40: warning: Using plain integer as NULL pointer [sparse]

I don't get why would sparse complain about this... Anyway I prefer
the !!(<pointer>) alternative if you don't mind. Otherwise the "!=
NULL" comparison feels wrong.

> 
> Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller")
> Signed-off-by: Florian Fainelli <[email-masked]>
> ---
>  drivers/mtd/nand/raw/brcmnand/brcmnand.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> index 15ef30b368a5..73f7a0945399 100644
> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> @@ -909,7 +909,7 @@ static inline void brcmnand_set_wp(struct brcmnand_controller *ctrl, bool en)
>  
>  static inline bool has_flash_dma(struct brcmnand_controller *ctrl)
>  {
> -	return ctrl->flash_dma_base;
> +	return ctrl->flash_dma_base != NULL;
>  }
>  
>  static inline void disable_ctrl_irqs(struct brcmnand_controller *ctrl)

Thanks,
Miquèl

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