From 3e164bf592bbbdde269c5cadc60a96f69cc6eed7 Mon Sep 17 00:00:00 2001 From: Baineng Shou Date: Mon, 17 Aug 2026 13:04:56 +0800 Subject: drm/prime: use dma_buf_fd_install() to preserve export tracing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Acked-by: Sumit Semwal Reviewed-by: Christian König Signed-off-by: Baineng Shou Link: https://lore.kernel.org/r/20260817050457.1005285-4-shoubaineng@gmail.com Signed-off-by: Christian König --- drivers/gpu/drm/drm_prime.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 9b44c78cd77f..fe3436d1235d 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -524,7 +524,7 @@ int drm_gem_prime_handle_to_fd(struct drm_device *dev, return PTR_ERR(dmabuf); } - fd_install(fd, dmabuf->file); + dma_buf_fd_install(dmabuf, fd); *prime_fd = fd; return 0; } -- cgit v1.2.3