From f92f053bb60924297afb8a1bd9166712c0fe5e88 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Thu, 8 Sep 2016 12:30:01 +0200 Subject: [PATCH] drm: Move property validation to a helper, v2. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Property lifetimes are equal to the device lifetime, so the separate drm_property_find is not needed. The pointer can be retrieved from the properties member, which saves us some locking and a extra lookup. The lifetime for properties is until the device is destroyed, which happens late in the device unload path. kms_atomic is also testing for invalid properties which returns -ENOENT, to be consistent return -ENOENT for valid properties that don't appear on the object property list. Changes since v1: - Return -ENOENT for invalid properties to make kms_atomic pass. - Change commit message slightly to take this into account. Testcase: kms_atomic Testcase: kms_properties Fixes: 4e9951d96093 ("drm/atomic: Reject properties not part of the object.") Suggested-by: Ville Syrjälä Signed-off-by: Maarten Lankhorst Signed-off-by: Sean Paul Link: http://patchwork.freedesktop.org/patch/msgid/599c7fa8-b6fd-a42b-c619-a9e4a9c5c244@linux.intel.com --- drivers/gpu/drm/drm_atomic.c | 13 ++---------- drivers/gpu/drm/drm_crtc_internal.h | 2 ++ drivers/gpu/drm/drm_mode_object.c | 31 +++++++++++++++-------------- 3 files changed, 20 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index a5126e5c05ee..904d29c012ad 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1609,7 +1609,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, struct drm_crtc_state *crtc_state; unsigned plane_mask; int ret = 0; - unsigned int i, j, k; + unsigned int i, j; /* disallow for drivers not supporting atomic: */ if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) @@ -1691,16 +1691,7 @@ retry: goto out; } - for (k = 0; k < obj->properties->count; k++) - if (obj->properties->properties[k]->base.id == prop_id) - break; - - if (k == obj->properties->count) { - ret = -EINVAL; - goto out; - } - - prop = drm_property_find(dev, prop_id); + prop = drm_mode_obj_find_prop_id(obj, prop_id); if (!prop) { drm_mode_object_unreference(obj); ret = -ENOENT; diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h index a3622644bccf..444e609078cc 100644 --- a/drivers/gpu/drm/drm_crtc_internal.h +++ b/drivers/gpu/drm/drm_crtc_internal.h @@ -115,6 +115,8 @@ int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic, uint32_t __user *prop_ptr, uint64_t __user *prop_values, uint32_t *arg_count_props); +struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj, + uint32_t prop_id); /* IOCTL */ diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c index 6edda8382a4c..9f17085b1fdd 100644 --- a/drivers/gpu/drm/drm_mode_object.c +++ b/drivers/gpu/drm/drm_mode_object.c @@ -372,14 +372,25 @@ out: return ret; } +struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj, + uint32_t prop_id) +{ + int i; + + for (i = 0; i < obj->properties->count; i++) + if (obj->properties->properties[i]->base.id == prop_id) + return obj->properties->properties[i]; + + return NULL; +} + int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_mode_obj_set_property *arg = data; struct drm_mode_object *arg_obj; - struct drm_mode_object *prop_obj; struct drm_property *property; - int i, ret = -EINVAL; + int ret = -EINVAL; struct drm_mode_object *ref; if (!drm_core_check_feature(dev, DRIVER_MODESET)) @@ -392,23 +403,13 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, ret = -ENOENT; goto out; } - if (!arg_obj->properties) - goto out_unref; - - for (i = 0; i < arg_obj->properties->count; i++) - if (arg_obj->properties->properties[i]->base.id == arg->prop_id) - break; - if (i == arg_obj->properties->count) + if (!arg_obj->properties) goto out_unref; - prop_obj = drm_mode_object_find(dev, arg->prop_id, - DRM_MODE_OBJECT_PROPERTY); - if (!prop_obj) { - ret = -ENOENT; + property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id); + if (!property) goto out_unref; - } - property = obj_to_property(prop_obj); if (!drm_property_change_valid_get(property, arg->value, &ref)) goto out_unref; -- 2.20.1