[PATCH] Revert "drm: Unify handling of blob and object properties"

[Maarten Lankhorst]

This reverts commit 77953bd136d2a70bca2dc93b3ccda07a2b37076f.

This causes a kernel panic when trying to assign a blob to a property,
and has obviously never been tested.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/drm_property.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_property.c b/drivers/gpu/drm/drm_property.c
index 4139afbcc267..a4d81cf4ffa0 100644
--- a/drivers/gpu/drm/drm_property.c
+++ b/drivers/gpu/drm/drm_property.c
@@ -870,8 +870,20 @@ bool drm_property_change_valid_get(struct drm_property *property,
 		for (i = 0; i < property->num_values; i++)
 			valid_mask |= (1ULL << property->values[i]);
 		return !(value & ~valid_mask);
-	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB) ||
-		   drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
+		struct drm_property_blob *blob;
+
+		if (value == 0)
+			return true;
+
+		blob = drm_property_lookup_blob(property->dev, value);
+		if (blob) {
+			*ref = &blob->base;
+			return true;
+		} else {
+			return false;
+		}
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
 		/* a zero value for an object property translates to null: */
 		if (value == 0)
 			return true;
@@ -888,12 +900,13 @@ bool drm_property_change_valid_get(struct drm_property *property,
 }
 
 void drm_property_change_valid_put(struct drm_property *property,
-				   struct drm_mode_object *ref)
+		struct drm_mode_object *ref)
 {
 	if (!ref)
 		return;
 
-	if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT) ||
-	    drm_property_type_is(property, DRM_MODE_PROP_BLOB))
+	if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
 		drm_mode_object_unreference(ref);
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
+		drm_property_unreference_blob(obj_to_blob(ref));
 }
-- 
2.7.4