[PATCH] Fix "ibm,processor-radix-AP-encodings"

[Balbir Singh]

The top 3 bits of the lower order byte should contain the
AP encoding, we assume the top 3 bits of the MSB.

Signed-off-by: Balbir Singh <bsingharora at gmail.com>
---

 - Detected while reviewing Chris Smart's patch to add radix-AP-encoding
   to skiboot
 - Also fixed typo (sift/shift)

 arch/powerpc/mm/pgtable-radix.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index af897d9..d525b0b 100644
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -245,10 +245,10 @@ static int __init radix_dt_scan_page_sizes(unsigned long node,
 
 		struct mmu_psize_def *def;
 
-		/* top 3 bit is AP encoding */
-		shift = be32_to_cpu(prop[0]) & ~(0xe << 28);
-		ap = be32_to_cpu(prop[0]) >> 29;
-		pr_info("Page size sift = %d AP=0x%x\n", shift, ap);
+		/* top 3 bits of the lower order byte is AP encoding */
+		shift = be32_to_cpu(prop[0]) & 0x1f;
+		ap = (be32_to_cpu(prop[0]) >> 5) & 0x7;
+		pr_info("Page size shift = %d AP=0x%x\n", shift, ap);
 
 		idx = get_idx_from_shift(shift);
 		if (idx < 0)
-- 
2.5.5