Hi, I've found a few potential issues left after the hotplug rework. In vc4_hdmi.c we're missing two mutex_unlock() calls when the device is unplugged. vc4_crtc and vc4_plane seem to miss some drm_dev_enter()/drm_dev_exit() calls to protect against resource access after the device/driver is unbound, but the DRM potentially isn't freed yet and userspace can still call into the driver. Changes in v2: - Use drm_device pointer from struct drm_plane (Maxime) - Protect entire functions to increase readability (Maxime) - Add another patch to fix an uncovered MMIO access in vc4_hvs.c Danilo Krummrich (4): drm/vc4: hdmi: unlock mutex when device is unplugged drm/vc4: plane: protect device resources after removal drm/vc4: crtc: protect device resources after removal drm/vc4: hvs: protect drm_print_regset32() drivers/gpu/drm/vc4/vc4_crtc.c | 41 ++++++++++++++++++++++++++++++++- drivers/gpu/drm/vc4/vc4_hdmi.c | 7 ++++-- drivers/gpu/drm/vc4/vc4_hvs.c | 4 ++-- drivers/gpu/drm/vc4/vc4_plane.c | 20 ++++++++++++++++ 4 files changed, 67 insertions(+), 5 deletions(-) base-commit: 8ba9249396bef37cb68be9e8dee7847f1737db9d -- 2.37.2
