[PATCH v5 03/14] arm64/numa: add nid check for memory block

On 2016/8/10 10:12, Hanjun Guo wrote:

On 2016/8/8 17:18, Zhen Lei wrote:

quoted

Use the same tactic to cpu and numa-distance nodes.

Signed-off-by: Zhen Lei <redacted>
---
 arch/arm64/mm/numa.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c
index c7fe3ec..2601660 100644
--- a/arch/arm64/mm/numa.c
+++ b/arch/arm64/mm/numa.c

@@ -141,6 +141,11 @@ int __init numa_add_memblk(int nid, u64 start, u64 end)
 {
 	int ret;

+	if (nid >= MAX_NUMNODES) {
+		pr_warn("NUMA: Node id %u exceeds maximum value\n", nid);
+		return -EINVAL;
+	}

I think this check should be added to of_numa_parse_memory_nodes(), which before
the numa_add_memblk() called, it's the same logic in of_numa_parse_cpu_nodes() and
the node id is checked before calling numa_add_memblk() in ACPI.

Yes, you are right. This check is arch independent.

Thanks
Hanjun



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