rust: dma: declare cfi_encoding for dma_data_direction

bindgen generates bindings::dma_data_direction as an integer by default,
while C callback tables such as dma_buf_ops declare the parameter as
enum dma_data_direction. kCFI encodes enum types by name even with
integer normalization, so the type ids would not match when C calls into
a Rust callback taking bindings::dma_data_direction.

Generate dma_data_direction as a newtype with a cfi_encoding, as is done
for lru_status, and convert DataDirection through the newtype's
constants.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Cc: stable@vger.kernel.org
Fixes: c2437c43cfb1 ("rust: dma: implement DataDirection")
Link: https://patch.msgid.link/20261019-rust-cfi-fixes-v1-3-9503472ba738@google.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

0 files changed, 0 insertions, 0 deletions