On 16/06/2016 23:27, 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.lezc...@linaro.org>
Acked-by: John Crispin <j...@phrozen.org>
> ---
> arch/mips/ralink/cevt-rt3352.c | 19 +++++++++++++------
> 1 file changed, 13 insertions(+), 6 deletions(-)
>
> diff --git a/arch/mips/ralink/cevt-rt3352.c b/arch/mips/ralink/cevt-rt3352.c
> index 3ad0b07..f2d3c79 100644
> --- a/arch/mips/ralink/cevt-rt3352.c
> +++ b/arch/mips/ralink/cevt-rt3352.c
> @@ -117,11 +117,13 @@ static int systick_set_oneshot(struct
> clock_event_device *evt)
> return 0;
> }
>
> -static void __init ralink_systick_init(struct device_node *np)
> +static int __init ralink_systick_init(struct device_node *np)
> {
> + int ret;
> +
> systick.membase = of_iomap(np, 0);
> if (!systick.membase)
> - return;
> + return -ENXIO;
>
> systick_irqaction.name = np->name;
> systick.dev.name = np->name;
> @@ -131,16 +133,21 @@ static void __init ralink_systick_init(struct
> device_node *np)
> systick.dev.irq = irq_of_parse_and_map(np, 0);
> if (!systick.dev.irq) {
> pr_err("%s: request_irq failed", np->name);
> - return;
> + return -EINVAL;
> }
>
> - clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
> - SYSTICK_FREQ, 301, 16, clocksource_mmio_readl_up);
> + ret = clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
> + SYSTICK_FREQ, 301, 16,
> + clocksource_mmio_readl_up);
> + if (ret)
> + return ret;
>
> clockevents_register_device(&systick.dev);
>
> pr_info("%s: running - mult: %d, shift: %d\n",
> np->name, systick.dev.mult, systick.dev.shift);
> +
> + return 0;
> }
>
> -CLOCKSOURCE_OF_DECLARE(systick, "ralink,cevt-systick", ralink_systick_init);
> +CLOCKSOURCE_OF_DECLARE_RET(systick, "ralink,cevt-systick",
> ralink_systick_init);
>
