[U-Boot] [PATCH 1/1] video: rk3399_mipi: correct error checking

[Punit Agrawal]

Heinrich Schuchardt <xypron.glpk at gmx.de> writes:

> Pointers are never negative. Use macro IS_ERR() for checking.
> cf. rk3288_mipi.c
>
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> ---
>  drivers/video/rockchip/rk3399_mipi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/video/rockchip/rk3399_mipi.c b/drivers/video/rockchip/rk3399_mipi.c
> index 9ef202bf09..7560e0c07b 100644
> --- a/drivers/video/rockchip/rk3399_mipi.c
> +++ b/drivers/video/rockchip/rk3399_mipi.c
> @@ -128,7 +128,7 @@ static int rk_mipi_ofdata_to_platdata(struct udevice *dev)
>  	struct rk_mipi_priv *priv = dev_get_priv(dev);
>  
>  	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
> -	if (priv->grf <= 0) {
> +	if (!priv->grf || IS_ERR(priv->grf)) {

The above two checks can be combined into IS_ERR_OR_NULL().

>  		debug("%s: Get syscon grf failed (ret=%p)\n",
>  		      __func__, priv->grf);
>  		return  -ENXIO;