Re: [PATCH V2 51/63] clocksource/drivers/versatile: Convert init function to return error

[Liviu Dudau]

On Thu, Jun 16, 2016 at 11:27:10PM +0200, Daniel Lezcano wrote:
> The init functions do not return any error. They behave as the following:
> 
>   - panic, thus leading to a kernel crash while another timer may work and
>        make the system boot up correctly
> 
>   or
> 
>   - print an error and let the caller unaware if the state of the system
> 
> Change that by converting the init functions to return an error conforming
> to the CLOCKSOURCE_OF_RET prototype.
> 
> Proper error handling (rollback, errno value) will be changed later case
> by case, thus this change just return back an error or success in the init
> function.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
> ---
>  drivers/clocksource/versatile.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/clocksource/versatile.c b/drivers/clocksource/versatile.c
> index 0a26d3d..8daeffa 100644
> --- a/drivers/clocksource/versatile.c
> +++ b/drivers/clocksource/versatile.c
> @@ -25,18 +25,20 @@ static u64 notrace versatile_sys_24mhz_read(void)
>  	return readl(versatile_sys_24mhz);
>  }
>  
> -static void __init versatile_sched_clock_init(struct device_node *node)
> +static int __init versatile_sched_clock_init(struct device_node *node)
>  {
>  	void __iomem *base = of_iomap(node, 0);
>  
>  	if (!base)
> -		return;
> +		return -ENXIO;
>  
>  	versatile_sys_24mhz = base + SYS_24MHZ;
>  
>  	sched_clock_register(versatile_sys_24mhz_read, 32, 24000000);
> +
> +	return 0;
>  }
> -CLOCKSOURCE_OF_DECLARE(vexpress, "arm,vexpress-sysreg",
> +CLOCKSOURCE_OF_DECLARE_RET(vexpress, "arm,vexpress-sysreg",
>  		       versatile_sched_clock_init);
> -CLOCKSOURCE_OF_DECLARE(versatile, "arm,versatile-sysreg",
> +CLOCKSOURCE_OF_DECLARE_RET(versatile, "arm,versatile-sysreg",
>  		       versatile_sched_clock_init);
> -- 
> 1.9.1
> 

Acked-by: Liviu Dudau <Liviu.Dudau@xxxxxxx>

-- 
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