[PATCH] ARM: parameter initrd must override FDT initrd

[Andrew Lunn]

On Sat, Jan 11, 2014 at 10:03:58AM +1000, klightspeed at killerwolves.net wrote:
> The initrd_start and initrd_end as set by FDT was overriding
> the phys_initrd_start and phys_initrd_size set by the initrd=
> kernel parameter.  This patch will ignore the initrd_start
> and initrd_end set earlier if phys_initrd_start and
> phys_initrd_size (as set by the initrd= parameter) are set.
> 
> Signed-off-by: Ben Peddell <klightspeed at killerwolves.net>

Hi Ben

Since this is a fix, it is a good idea to put Fix somewhere in the
subject.  You should also try to say which patch broke it. Looking at
the git logs, i think it was 65939301acdb1e593fdb424bd356f0b9bc7ba5be
"arm: set initrd_start/initrd_end for fdt scan" which came from Rob
Herring <rob.herring at calxeda.com>. I added Rob to CC.

	Andrew

> ---
>  arch/arm/mm/init.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> index 1f7b19a..819c539 100644
> --- a/arch/arm/mm/init.c
> +++ b/arch/arm/mm/init.c
> @@ -345,10 +345,11 @@ void __init arm_memblock_init(struct meminfo *mi,
>  #endif
>  #ifdef CONFIG_BLK_DEV_INITRD
>  	/* FDT scan will populate initrd_start */
> -	if (initrd_start) {
> +	if (initrd_start && !phys_initrd_size) {
>  		phys_initrd_start = __virt_to_phys(initrd_start);
>  		phys_initrd_size = initrd_end - initrd_start;
>  	}
> +	initrd_start = initrd_end = 0;
>  	if (phys_initrd_size &&
>  	    !memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) {
>  		pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region - disabling initrd\n",
> -- 
> 1.8.3.2
> 
> 
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