Perf tables v 1.2 and 1.3 (seen on Geforce FX / 5) are not long enough to store
the voltage label/id

Signed-off-by: Emil Velikov <[email protected]>
---
 drivers/gpu/drm/nouveau/nouveau_perf.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_perf.c 
b/drivers/gpu/drm/nouveau/nouveau_perf.c
index ac62a1b..b09780b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_perf.c
+++ b/drivers/gpu/drm/nouveau/nouveau_perf.c
@@ -134,7 +134,11 @@ nouveau_perf_init(struct drm_device *dev)
                case 0x13:
                case 0x15:
                        perflvl->fanspeed = entry[55];
-                       perflvl->voltage = entry[56];
+/*
+ * Table v 1.2 and 1.3 does not have big enough recordlen to store the
+ * voltage
+ */
+                       perflvl->voltage = (recordlen > 56) ? entry[56] : 0;
                        perflvl->core = ROM32(entry[1]) * 10;
                        perflvl->memory = ROM32(entry[5]) * 20;
                        break;
-- 
1.7.1

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