On Thu, May 26, 2016 at 10:43:58AM +0800, Zhen Lei wrote:
> For a normal memory@ devicetree node, its reg property can contains more
> memory blocks.
>
> Because we don't known how many memory blocks maybe contained, so we try
> from index=0, increase 1 until error returned(the end).
>
> Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
> ---
> drivers/of/of_numa.c | 30 ++++++++++++++++++++----------
> 1 file changed, 20 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
> index 21d831f..2c5f249 100644
> --- a/drivers/of/of_numa.c
> +++ b/drivers/of/of_numa.c
> @@ -63,7 +63,7 @@ static int __init of_numa_parse_memory_nodes(void)
> struct device_node *np = NULL;
> struct resource rsrc;
> u32 nid;
> - int r = 0;
> + int i, r = 0;
>
> for (;;) {
> np = of_find_node_by_type(np, "memory");
> @@ -82,17 +82,27 @@ static int __init of_numa_parse_memory_nodes(void)
> /* some other error */
> break;
>
> - r = of_address_to_resource(np, 0, &rsrc);
> - if (r) {
> - pr_err("NUMA: bad reg property in memory node\n");
> - break;
> + for (i = 0; ; i++) {
> + r = of_address_to_resource(np, i, &rsrc);
> + if (r) {
> + /* reached the end of of_address */
> + if (i > 0) {
> + r = 0;
> + break;
> + }
> +
> + pr_err("NUMA: bad reg property in memory node\n");
> + goto finished;
> + }
> +
> + r = numa_add_memblk(nid, rsrc.start,
> + rsrc.end - rsrc.start + 1);
> + if (r)
> + goto finished;
> }
> -
> - r = numa_add_memblk(nid, rsrc.start,
> - rsrc.end - rsrc.start + 1);
> - if (r)
> - break;
> }
> +
> +finished:
> of_node_put(np);
This function can be simplified down to:
for_each_node_by_type(np, "memory") {
r = of_property_read_u32(np, "numa-node-id", &nid);
if (r == -EINVAL)
/*
* property doesn't exist if -EINVAL, continue
* looking for more memory nodes with
* "numa-node-id" property
*/
continue;
else if (r)
/* some other error */
break;
r = of_address_to_resource(np, 0, &rsrc);
for (i = 0; !r; i++, r = of_address_to_resource(np, i,
&rsrc)) {
r = numa_add_memblk(nid, rsrc.start,
rsrc.end - rsrc.start + 1);
}
}
of_node_put(np);
return r;
Perhaps with a "if (!i && r) pr_err()" for an error message at the end.
Rob
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