Reviewed-by: Aurabindo Pillai <[email protected]>
On 2025-04-17 15:30, Srinivasan Shanmugam wrote:
This commit updates the dm_force_atomic_commit function to replace the
usage of PTR_ERR_OR_ZERO with IS_ERR for checking error states after
retrieving the Connector (drm_atomic_get_connector_state), CRTC
(drm_atomic_get_crtc_state), and Plane (drm_atomic_get_plane_state)
states.
The function utilized PTR_ERR_OR_ZERO for error checking. However, this
approach is inappropriate in this context because the respective
functions do not return NULL; they return pointers that encode errors.
This change ensures that error pointers are properly checked using
IS_ERR before attempting to dereference.
Cc: Harry Wentland <[email protected]>
Cc: Nicholas Kazlauskas <[email protected]>
Cc: Tom Chung <[email protected]>
Cc: Roman Li <[email protected]>
Cc: Alex Hung <[email protected]>
Cc: Aurabindo Pillai <[email protected]>
Signed-off-by: Srinivasan Shanmugam <[email protected]>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 012ff8332dd2..4a31d99da505 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10621,16 +10621,20 @@ static int dm_force_atomic_commit(struct
drm_connector *connector)
*/
conn_state = drm_atomic_get_connector_state(state, connector);
- ret = PTR_ERR_OR_ZERO(conn_state);
- if (ret)
+ /* Check for error in getting connector state */
+ if (IS_ERR(conn_state)) {
+ ret = PTR_ERR(conn_state);
goto out;
+ }
/* Attach crtc to drm_atomic_state*/
crtc_state = drm_atomic_get_crtc_state(state,
&disconnected_acrtc->base);
- ret = PTR_ERR_OR_ZERO(crtc_state);
- if (ret)
+ /* Check for error in getting crtc state */
+ if (IS_ERR(crtc_state)) {
+ ret = PTR_ERR(crtc_state);
goto out;
+ }
/* force a restore */
crtc_state->mode_changed = true;
@@ -10638,9 +10642,11 @@ static int dm_force_atomic_commit(struct drm_connector
*connector)
/* Attach plane to drm_atomic_state */
plane_state = drm_atomic_get_plane_state(state, plane);
- ret = PTR_ERR_OR_ZERO(plane_state);
- if (ret)
+ /* Check for error in getting plane state */
+ if (IS_ERR(plane_state)) {
+ ret = PTR_ERR(plane_state);
goto out;
+ }
/* Call commit internally with the state we just constructed */
ret = drm_atomic_commit(state);
--
Thanks & Regards,
Aurabindo Pillai
