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([117.133.183.252]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84a4f819a92sm1513008b3a.52.2026.07.14.06.27.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jul 2026 06:27:35 -0700 (PDT) From: Baineng Shou To: =?UTF-8?q?Christian=20K=C3=B6nig?= , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Baineng Shou Subject: [PATCH v3] drm/prime: use dma_buf_fd_install() to preserve export tracing Date: Tue, 14 Jul 2026 21:27:27 +0800 Message-Id: <20260714132727.200995-1-shoubaineng@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <4ccf4ae5-ccd7-4bec-836a-fcebfa271c96@amd.com> References: <4ccf4ae5-ccd7-4bec-836a-fcebfa271c96@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 Signed-off-by: Baineng Shou --- 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; } -- 2.34.1