Am Donnerstag, 16. Juni 2016, 23:26:22 schrieb Daniel Lezcano:
> 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 at linaro.org>
> ---
> drivers/clocksource/rockchip_timer.c | 26 ++++++++++++++------------
> 1 file changed, 14 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/clocksource/rockchip_timer.c
> b/drivers/clocksource/rockchip_timer.c index a3f22b0..d10bdee 100644
> --- a/drivers/clocksource/rockchip_timer.c
> +++ b/drivers/clocksource/rockchip_timer.c
> @@ -113,17 +113,17 @@ static irqreturn_t rk_timer_interrupt(int irq, void
> *dev_id) return IRQ_HANDLED;
> }
>
> -static void __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
> +static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
> {
> struct clock_event_device *ce = &bc_timer.ce;
> struct clk *timer_clk;
> struct clk *pclk;
> - int ret, irq;
> + int ret = -EINVAL, irq;
>
> bc_timer.base = of_iomap(np, 0);
> if (!bc_timer.base) {
> pr_err("Failed to get base address for '%s'\n", TIMER_NAME);
> - return;
> + return -ENXIO;
> }
> bc_timer.ctrl = bc_timer.base + ctrl_reg;
wouldn't it be nicer to also save the error values from all the intermediate
clock calls (ret = PTR_ERR(pclk) and so on).
Right now it will be always -EINVAL for all those clk calls and also
the irq_of_parse_and_map.
Heiko
