hdat: Rework parsing of system VPD for Open Power

Handle the OSYS record on OPP machines in stead of VSYS

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/core/vpd.c b/core/vpd.c
index d659198..c226f6d 100644
--- a/core/vpd.c
+++ b/core/vpd.c
@@ -113,7 +113,8 @@ const void *vpd_find_record(const void *vpd, size_t vpd_size,
 		/* Find record name */
 		rec_name = vpd_find_keyword(p, rec_sz, "RT", &namesz);
 		if (rec_name && strncmp(record, rec_name, namesz) == 0) {
-			*sz = rec_sz;
+			if (sz)
+				*sz = rec_sz;
 			return p;
 		}