From: Maarten Lankhorst Date: Wed, 7 Sep 2016 09:52:40 +0000 (+0200) Subject: Revert "drm: Unify handling of blob and object properties" X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=30c06570cd6716ba392f674c49dee5a69f96e096;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Revert "drm: Unify handling of blob and object properties" This reverts commit 77953bd136d2a70bca2dc93b3ccda07a2b37076f. This causes a kernel panic when trying to assign a blob to a property, and has obviously never been tested. Fixes: 77953bd136d2 ("drm: Unify handling of blob and object properties") Signed-off-by: Maarten Lankhorst Tested-by: Liu Ying Acked-by: Daniel Stone Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/8c0d3482-1bb5-6a15-b105-6bda2b31b5dc@linux.intel.com --- 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)); }