Primary motivation is to avoid havig a dangling pointer with panels.
In a scenario where panel device no longer exists, the DRM driver
has no idea of it. It can continue to try and access a panel leading
to use-after-free situations.
This is the initial draft more for feedback only. Once the path
forward is clear, further drivers will be converted to using the API.
Suggested-by: Maxime Ripard <mripard@xxxxxxxxxx>
Signed-off-by: Anusha Srivatsa <asrivats@xxxxxxxxxx>
---
Anusha Srivatsa (2):
drm/panel: Add new helpers for refcounted panel allocatons
drm/panel/panel-simple: Use the new allocation in place of devm_kzalloc()
drivers/gpu/drm/drm_panel.c | 50 +++++++++++++++++++++++++++++++
drivers/gpu/drm/panel/panel-simple.c | 4 +--
include/drm/drm_panel.h | 58 ++++++++++++++++++++++++++++++++++++
3 files changed, 109 insertions(+), 3 deletions(-)
---
base-commit: 3282422bf251db541fe07c548ca304130d37d754
change-id: 20250311-drm-panel-c327992e932e
Best regards,
--
Anusha Srivatsa <asrivats@xxxxxxxxxx>
