[PATCH v11 5/9] ARM: l2c: Get outer cache .write_sec callback from mach_desc only if not NULL

[Tony Lindgren]

* Marek Szyprowski <m.szyprowski at samsung.com> [150105 04:22]:
> From: Tomasz Figa <t.figa at samsung.com>
> 
> Certain platforms (i.e. Exynos) might need to set .write_sec callback
> from firmware initialization which is happenning in .init_early callback
> of machine descriptor. However current code will overwrite the pointer
> with whatever is present in machine descriptor, even though it can be
> already set earlier. This patch fixes this by making the assignment
> conditional, depending on whether current .write_sec callback is NULL.
> 
> Signed-off-by: Tomasz Figa <t.figa at samsung.com>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>

Acked-by: Tony Lindgren <tony at atomide.com>

> ---
>  arch/arm/kernel/irq.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
> index ad857bada96c..350f188c92d2 100644
> --- a/arch/arm/kernel/irq.c
> +++ b/arch/arm/kernel/irq.c
> @@ -109,7 +109,8 @@ void __init init_IRQ(void)
>  
>  	if (IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_CACHE_L2X0) &&
>  	    (machine_desc->l2c_aux_mask || machine_desc->l2c_aux_val)) {
> -		outer_cache.write_sec = machine_desc->l2c_write_sec;
> +		if (!outer_cache.write_sec)
> +			outer_cache.write_sec = machine_desc->l2c_write_sec;
>  		ret = l2x0_of_init(machine_desc->l2c_aux_val,
>  				   machine_desc->l2c_aux_mask);
>  		if (ret)
> -- 
> 1.9.2
>