[RFCv2 09/13] drm: Refactor object property check code

[Rob Clark <robdclark@gmail.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Refactor the code to check whether an object has a specific property
to a new function.

v1: original
v2: rebase on atomic -- Rob Clark
v3: EINVAL->ENOENT

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/drm_crtc.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index da641fb..9f46f3b 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -3375,6 +3375,19 @@ static int drm_mode_set_obj_prop(struct drm_mode_object *obj,
 	return -EINVAL;
 }
 
+static bool object_has_prop(const struct drm_mode_object *obj, u32 prop_id)
+{
+	int i;
+
+	if (!obj->properties)
+		return false;
+
+	for (i = 0; i < obj->properties->count; i++)
+		if (obj->properties->ids[i] == prop_id)
+			return true;
+	return false;
+}
+
 /* call with mode_config mutex held */
 static int drm_mode_set_obj_prop_id(struct drm_device *dev, void *state,
 		uint32_t obj_id, uint32_t obj_type,
@@ -3383,20 +3396,10 @@ static int drm_mode_set_obj_prop_id(struct drm_device *dev, void *state,
 	struct drm_mode_object *arg_obj;
 	struct drm_mode_object *prop_obj;
 	struct drm_property *property;
-	int i;
 
 	arg_obj = drm_mode_object_find(dev, obj_id, obj_type);
-	if (!arg_obj)
-		return -EINVAL;
-	if (!arg_obj->properties)
-		return -EINVAL;
-
-	for (i = 0; i < arg_obj->properties->count; i++)
-		if (arg_obj->properties->ids[i] == prop_id)
-			break;
-
-	if (i == arg_obj->properties->count)
-		return -EINVAL;
+	if (!(arg_obj && object_has_prop(arg_obj, prop_id)))
+		return -ENOENT;
 
 	prop_obj = drm_mode_object_find(dev, prop_id,
 					DRM_MODE_OBJECT_PROPERTY);
-- 
1.8.3.1

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