[PATCH] ARM: i.MX: Make sure *_get_boot_source always assignes *src

[Ahmad Fatoum]

On 10.06.22 18:50, Uwe Kleine-König wrote:
> Callers of *_get_boot_source (e.g. start_atf() of
> nxp-imx8mm-evk or protonic-imx8m) expect src to hold the bootsource
> after return. So assign a value also for the "unknown" case.

Did you check existing in-tree users to make sure none assigned
a different fallback value and assumed it won't be overwritten
if no bootsource could be found?

> 
> Fixes: ea55770308c0 ("ARM: i.MX: Add i.MX7 base architecture support")
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
> ---
>  arch/arm/mach-imx/boot.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
> index 63afdf1ef4ed..1b0bccb7fed8 100644
> --- a/arch/arm/mach-imx/boot.c
> +++ b/arch/arm/mach-imx/boot.c
> @@ -285,6 +285,8 @@ void imx53_get_boot_source(enum bootsource *src, int *instance)
>  	default:
>  		if (imx53_bootsource_nand(cfg1))
>  			*src = BOOTSOURCE_NAND;
> +		else
> +			*src = BOOTSOURCE_UNKNOWN;
>  		break;
>  	}
>  
> @@ -464,6 +466,8 @@ void imx6_get_boot_source(enum bootsource *src, int *instance)
>  	default:
>  		if (imx53_bootsource_nand(bootmode))
>  			*src = BOOTSOURCE_NAND;
> +		else
> +			*src = BOOTSOURCE_UNKNOWN;
>  		break;
>  	}
>  }
> @@ -526,6 +530,7 @@ static void __imx7_get_boot_source(enum bootsource *src, int *instance,
>  		*src = BOOTSOURCE_SERIAL;
>  		break;
>  	default:
> +		*src = BOOTSOURCE_UNKNOWN;
>  		break;
>  	}
>  }
> @@ -629,6 +634,8 @@ void vf610_get_boot_source(enum bootsource *src, int *instance)
>  	default:
>  		if (imx53_bootsource_nand(sbmr1))
>  			*src = BOOTSOURCE_NAND;
> +		else
> +			*src = BOOTSOURCE_UNKNOWN;
>  		break;
>  	}
>  }
> 
> base-commit: 345ef59aa0ea1a931629187449f63876501752cd


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |