I fixed all known kernel oopses by placing spinlock in interrupt handler
and changing driver initialization order.
Left to do:
1) deal with timers
2) support and testing on other platforms
I am going away for few days for not being too noisy.
Best,
Alexander Bersenev, Institute of Mathematics and Mechanics, Russia
понедельник, 28 апреля 2014 г., 11:10:18 UTC+6 пользователь Александр
Берсенев написал:
>
> I did 300 000 insmod/rmmod cycles and all was ok, but the memory
> consumption increased from 23MB to 36MB. I think, it is because of timers.
> As Hans de Goede said, it is better to use devm_clk_get to get the clock. I
> use this function in my first patch, but I not found a way to get apb0_ir0
> clock, because it is not registered. I forced registering with this part of
> first patch:
>
> diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
> index 3be8846..83a20fa 100644
> --- a/drivers/clk/sunxi/clk-sunxi.c
> +++ b/drivers/clk/sunxi/clk-sunxi.c
> @@ -1036,11 +1036,17 @@ static void __init sunxi_gates_clk_setup(struct
> device_node *node,
> /* No driver claims this clock, but it should remain gated */
> ignore = !strcmp("ahb_sdram", clk_name) ? CLK_IGNORE_UNUSED : 0;
>
> +
> clk_data->clks[i] = clk_register_gate(NULL, clk_name,
> clk_parent, ignore,
> reg + 4 * (i/32), i % 32,
> 0, &clk_lock);
> WARN_ON(IS_ERR(clk_data->clks[i]));
> +
> + if(!IS_ERR(clk_data->clks[i])) {
> + clk_register_clkdev(clk_data->clks[i], clk_name, NULL);
> + }
> +
>
> I am looking for sane way to do same without
> patching drivers/clk/sunxi/clk-sunxi.c.
>
> Also I've tested parallel module load/unload. I executed folowwing
> commands:
> while true; do echo bay; rmmod sunxi-ir; insmod /sunxi-ir.ko; done &
> while true; do echo bay; rmmod sunxi-ir; insmod /sunxi-ir.ko; done &
> ... 20 times ...
>
> It runs ok, but when I press buttons on my IR remote controller in the
> process, I got a kernel OOPS(null pointer dereference) sometimes. I am
> fixing this.
>
> Best,
> Alexander Bersenev, Institute of Mathematics and Mechanics, Russia
>
>
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