Merge tag 'drm-misc-next-2025-08-14' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for v6.18:

UAPI Changes:

- Add DRM_IOCTL_GEM_CHANGE_HANDLE for reassigning GEM handles
- Document DRM_MODE_PAGE_FLIP_EVENT

Cross-subsystem Changes:

fbcon:
- Add missing declarations in fbcon.h

Core Changes:

bridge:
- Fix ref counting

panel:
- Replace and remove mipi_dsi_generic_write_{seq/_chatty}()

sched:
- Fixes

Rust:
- Drop Opaque<> from ioctl arguments

Driver Changes:

amdxdma:
- Support buffers allocated by user space
- Streamline PM interfaces
- Fixes

bridge:
- cdns-dsi: Various improvements to mode setting
- Support Solomon SSD2825 plus DT bindings
- Support Waveshare DSI2DPI plus DT bindings

gud:
- Fixes

ivpu:
- Fixes

nouveau:
- Use GSP firmware by default
- Fixes

panel:
- panel-edp: Support mt8189 Chromebooks; Support BOE NV140WUM-N64;
  Support SHP LQ134Z1; Fixes
- panel-simple: Support Olimex LCD-OLinuXino-5CTS plus DT bindings
- Support Samsung AMS561RA01
- Support Hydis HV101HD1 plus DT bindings

panthor:
- Print task/pid on errors
- Fixes

renesas:
- convert to RUNTIME_PM_OPS

repaper:
- Use shadow-plane helpers

rocket:
- Add driver for Rockchip NPU plus DT bindings

sharp-memory:
- Use shadow-plane helpers

simpledrm:
- Use of_reserved_mem_region_to_resource() helper

tidss:
- Use crtc_ fields for programming display mode
- Remove other drivers from aperture

v3d:
- Support querying nubmer of GPU resets for KHR_robustness

vmwgfx:
- Fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250814072454.GA18104@linux.fritz.box

1 files changed, 7 insertions, 4 deletions

diff --git a/rust/kernel/drm/ioctl.rs b/rust/kernel/drm/ioctl.rs
index fdec01c37168..af1bb29cf06d 100644
--- a/rust/kernel/drm/ioctl.rs
+++ b/rust/kernel/drm/ioctl.rs
@@ -83,7 +83,7 @@ pub mod internal {
 ///
 /// ```ignore
 /// fn foo(device: &kernel::drm::Device<Self>,
-///        data: &Opaque<uapi::argument_type>,
+///        data: &mut uapi::argument_type,
 ///        file: &kernel::drm::File<Self::File>,
 /// ) -> Result<u32>
 /// ```
@@ -138,9 +138,12 @@ macro_rules! declare_drm_ioctls {
                             // SAFETY: The ioctl argument has size `_IOC_SIZE(cmd)`, which we
                             // asserted above matches the size of this type, and all bit patterns of
                             // UAPI structs must be valid.
-                            let data = unsafe {
-                                &*(raw_data as *const $crate::types::Opaque<$crate::uapi::$struct>)
-                            };
+                            // The `ioctl` argument is exclusively owned by the handler
+                            // and guaranteed by the C implementation (`drm_ioctl()`) to remain
+                            // valid for the entire lifetime of the reference taken here.
+                            // There is no concurrent access or aliasing; no other references
+                            // to this object exist during this call.
+                            let data = unsafe { &mut *(raw_data.cast::<$crate::uapi::$struct>()) };
                             // SAFETY: This is just the DRM file structure
                             let file = unsafe { $crate::drm::File::from_raw(raw_file) };