[PATCH v2 1/3] powerpc/mm/drconf: Use NUMA_NO_NODE on failures instead of node 0

[Aneesh Kumar K.V]

If we fail to parse the associativity array we should default to
NUMA_NO_NODE instead of NODE 0. Rest of the code fallback to the
right default if we find the numa node value NUMA_NO_NODE.

Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
---
 arch/powerpc/mm/numa.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 917904d2fe97..aee718509085 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -416,17 +416,19 @@ static int of_get_assoc_arrays(struct assoc_arrays *aa)
 static int of_drconf_to_nid_single(struct drmem_lmb *lmb)
 {
        struct assoc_arrays aa = { .arrays = NULL };
-       int default_nid = 0;
+       int default_nid = NUMA_NO_NODE;
        int nid = default_nid;
        int rc, index;
 
+       if (min_common_depth < 0)
+               return default_nid;
+
        rc = of_get_assoc_arrays(&aa);
        if (rc)
                return default_nid;
 
-       if (min_common_depth > 0 && min_common_depth <= aa.array_sz &&
-           !(lmb->flags & DRCONF_MEM_AI_INVALID) &&
-           lmb->aa_index < aa.n_arrays) {
+       if (min_common_depth <= aa.array_sz &&
+           !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < 
aa.n_arrays) {
                index = lmb->aa_index * aa.array_sz + min_common_depth - 1;
                nid = of_read_number(&aa.arrays[index], 1);
 
-- 
2.21.0