[PATCH] drm/i915/bios: fix off by one in parse_generic_dtd()

[Dan Carpenter]

The "num_dtd" variable is the number of elements in the
generic_dtd->dtd[] array so the > needs to be >= to prevent reading one
element beyond the end of the array.

Fixes: 33ef6d4fd8df ("drm/i915/vbt: Handle generic DTD block")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 1aeecdd02293..d1e27ee86e53 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -338,7 +338,7 @@ parse_generic_dtd(struct drm_i915_private *dev_priv,
 
 	num_dtd = (get_blocksize(generic_dtd) -
 		   sizeof(struct bdb_generic_dtd)) / generic_dtd->gdtd_size;
-	if (dev_priv->vbt.panel_type > num_dtd) {
+	if (dev_priv->vbt.panel_type >= num_dtd) {
 		DRM_ERROR("Panel type %d not found in table of %d DTD's\n",
 			  dev_priv->vbt.panel_type, num_dtd);
 		return;
-- 
2.11.0