[PATCH v10 05/10] rust: drm: set fops.owner from driver module pointer

[Alvin Sun]

Change `create_fops()` to accept an owner module pointer instead of
hardcoding `null_mut()`, ensuring the kernel correctly tracks the
module owning the DRM device's file operations.

Assisted-by: opencode:glm-5.2
Reviewed-by: Andreas Hindborg <a.hin...@kernel.org>
Reviewed-by: Gary Guo <ga...@garyguo.net>
Acked-by: Danilo Krummrich <da...@kernel.org>
Reviewed-by: Alice Ryhl <alic...@google.com>
Signed-off-by: Alvin Sun <alvi...@linux.dev>
---
rust/kernel/drm/device.rs | 3 ++-
rust/kernel/drm/gem/mod.rs | 4 ++--
2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/rust/kernel/drm/device.rs b/rust/kernel/drm/device.rs
index 477cf771fb10e..73fbd551f0811 100644
--- a/rust/kernel/drm/device.rs
+++ b/rust/kernel/drm/device.rs
@@ -203,7 +203,8 @@ const fn compute_features() -> u32 {
fops: &Self::GEM_FOPS,
};

- const GEM_FOPS: bindings::file_operations = drm::gem::create_fops();
+ const GEM_FOPS: bindings::file_operations =
+ drm::gem::create_fops(crate::module::this_module::<T::OwnerModule>().as_ptr());

/// Create a new `UnregisteredDevice` for a `drm::Driver`.
///
diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
index c8b66d8168719..a7ba1453d40b9 100644
--- a/rust/kernel/drm/gem/mod.rs
+++ b/rust/kernel/drm/gem/mod.rs
@@ -387,10 +387,10 @@ impl<T: DriverObject, Ctx: DeviceContext> AllocImpl for Object<T, Ctx> {
};
}

-pub(super) const fn create_fops() -> bindings::file_operations {
+pub(super) const fn create_fops(owner: *mut bindings::module) -> bindings::file_operations {
let mut fops: bindings::file_operations = pin_init::zeroed();

- fops.owner = core::ptr::null_mut();
+ fops.owner = owner;
fops.open = Some(bindings::drm_open);
fops.release = Some(bindings::drm_release);
fops.unlocked_ioctl = Some(bindings::drm_ioctl);

--
2.43.0