mbox series

[RFC,0/2] drm/panel: Refcounted panel allocation

Message ID 20250312-drm-panel-v1-0-e99cd69f6136@redhat.com (mailing list archive)
Headers show
Series drm/panel: Refcounted panel allocation | expand

Message

Anusha Srivatsa March 13, 2025, 12:54 a.m. UTC 
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@kernel.org>
Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>
---
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,