drm_gem_prime_handle_to_fd() open-codes fd reservation and install
using get_unused_fd_flags() + fd_install() directly. This bypasses
the DMA_BUF_TRACE() call that dma_buf_fd() emits, so observability
tools relying on the trace_dma_buf_fd tracepoint silently miss all
DRM PRIME exports.
Replace the bare fd_install() with dma_buf_fd_install(), which wraps
fd_install() together with DMA_BUF_TRACE(), restoring full tracepoint
coverage. No functional change; the fd lifecycle (get_unused_fd_flags
→ work → install) is already correct.
Note: this patch depends on dma_buf_fd_install() introduced in
"dma-buf: dma-heap: don't publish fd before copy_to_user() succeeds"
[1].
[1] https://lore.kernel.org/dri-devel/20260714114654.3885457-2-shoubaineng@gmail.com/
Suggested-by: Christian König <christian.koenig@amd.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Baineng Shou <shoubaineng@gmail.com>
Link: https://lore.kernel.org/r/20260817050457.1005285-4-shoubaineng@gmail.com
Signed-off-by: Christian König <christian.koenig@amd.com>
3e164bf592