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drm/atomic: Make drm_atomic_private_obj_init fallible

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Since we're going to move the drm_private_obj state allocation to a
callback, we need to be able to deal with its possible failure.

Make drm_private_obj_init return an error code on failure.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260128-drm-private-obj-reset-v4-1-90891fa3d3b0@redhat.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This commit is contained in:
Maxime Ripard
2026-01-28 13:43:45 +01:00
parent 55c19e27c5
commit 95ffa10056
2 changed files with 13 additions and 9 deletions
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14
drivers/gpu/drm/drm_atomic.c
View File

@@ -927,12 +927,14 @@ static void drm_atomic_plane_print_state(struct drm_printer *p,
*
* Initialize the private object, which can be embedded into any
* driver private object that needs its own atomic state.
*
* RETURNS:
* Zero on success, error code on failure
*/
void
drm_atomic_private_obj_init(struct drm_device *dev,
struct drm_private_obj *obj,
struct drm_private_state *state,
const struct drm_private_state_funcs *funcs)
int drm_atomic_private_obj_init(struct drm_device *dev,
struct drm_private_obj *obj,
struct drm_private_state *state,
const struct drm_private_state_funcs *funcs)
{
memset(obj, 0, sizeof(*obj));
@@ -944,6 +946,8 @@ drm_atomic_private_obj_init(struct drm_device *dev,
list_add_tail(&obj->head, &dev->mode_config.privobj_list);
state->obj = obj;
return 0;
}
EXPORT_SYMBOL(drm_atomic_private_obj_init);

8
include/drm/drm_atomic.h
View File

@@ -723,10 +723,10 @@ struct drm_connector_state * __must_check
drm_atomic_get_connector_state(struct drm_atomic_state *state,
struct drm_connector *connector);
void drm_atomic_private_obj_init(struct drm_device *dev,
struct drm_private_obj *obj,
struct drm_private_state *state,
const struct drm_private_state_funcs *funcs);
int drm_atomic_private_obj_init(struct drm_device *dev,
struct drm_private_obj *obj,
struct drm_private_state *state,
const struct drm_private_state_funcs *funcs);
void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
struct drm_private_state * __must_check