Before reading the HPTE encoding values we initialize all of them to -1 (an
invalid value) to later being able to detect the initialized ones.

Signed-off-by: Laurent Dufour <redacted>
---
  arch/powerpc/mm/book3s64/hash_utils.c | 8 ++++++--
  1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index c3bfef08dcf8..2039bc315459 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c

@@ -408,7 +408,7 @@ static int __init htab_dt_scan_page_sizes(unsigned long node,
  {
  	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
  	const __be32 *prop;
-	int size = 0;
+	int size = 0, idx, base_idx;
  
  	/* We are scanning "cpu" nodes only */
  	if (type == NULL || strcmp(type, "cpu") != 0)

@@ -418,6 +418,11 @@ static int __init htab_dt_scan_page_sizes(unsigned long node,
  	if (!prop)
  		return 0;
  
+	/* Set all the penc values to invalid */
+	for (base_idx = 0; base_idx < MMU_PAGE_COUNT; base_idx++)
+		for (idx = 0; idx < MMU_PAGE_COUNT; idx++)
+			mmu_psize_defs[base_idx].penc[idx] = -1;
+
  	pr_info("Page sizes from device-tree:\n");
  	size /= 4;
  	cur_cpu_spec->mmu_features &= ~(MMU_FTR_16M_PAGE);

@@ -426,7 +431,6 @@ static int __init htab_dt_scan_page_sizes(unsigned long node,
  		unsigned int slbenc = be32_to_cpu(prop[1]);
  		unsigned int lpnum = be32_to_cpu(prop[2]);
  		struct mmu_psize_def *def;
-		int idx, base_idx;
  
  		size -= 3; prop += 3;
  		base_idx = get_idx_from_shift(base_shift);