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[35.204.179.181]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c15beb53b86sm213932966b.25.2026.07.08.08.22.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jul 2026 08:22:06 -0700 (PDT) From: =?utf-8?q?Andr=C3=A9_Draszik?= Subject: [PATCH v2 0/2] drm/drm_crtc: dma_fence_ops fixes Date: Wed, 08 Jul 2026 16:22:04 +0100 Message-Id: <20260708-linux-drm_crtc_fix2-v2-0-cf72be75d75a@linaro.org> 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 X-B4-Tracking: v=1; b=H4sIABxrTmoC/32NWwrCMBBFt1Lm20heJuKX+5BSYpq2A9rIpIZKy d6NXYCf53AfG6RAGBJcmg0oZEwY5wry0ICf3DwGhn1lkFwabsSZPXB+r6ynZ+dp8d2Aq2RSOev VSTstJNTmi0L1++qtrTxhWiJ99pMsfvb/XhZMMM9VsPauzKD0taYcxWOkEdpSyhd3oVZ5twAAA A== X-Change-ID: 20260618-linux-drm_crtc_fix2-23a7c354a412 To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Tvrtko Ursulin , Boris Brezillon , Philipp Stanner Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Peter Griffin , Tudor Ambarus , Juan Yescas , kernel-team@android.com, =?utf-8?q?Andr=C3=A9_Draszik?= X-Mailer: b4 0.14.3 Hi, These patches fix two issues in the drm/drm_crtc driver. Initially I was hitting the BUG_ON() in a scenario as explained in the commit message of what is now the second patch in this series. For the reasons outlines there, the BUG_ON() should just be removed. After posting, sashiko.dev noticed another issue, that was previously masked by the now-removed BUG_ON(). Since we can't have a loud BUG() be replaced with silent data corruption or worse, I've also added a patch to address this issue highlighted by sashiko.dev. I believe its observation and analysis to be correct. Cheers, Andre' Signed-off-by: André Draszik --- Changes in v2: - add new patch 1 to address sashiko observation - original patch 1 becomes patch 2 - patch 2: - don't turn fence_to_crtc() into macro (Jani, Philipp) - update commit message to include reference to deprecated use of BUG - Link to v1: https://lore.kernel.org/r/20260618-linux-drm_crtc_fix2-v1-1-c03e77b36f34@linaro.org --- André Draszik (2): drm/drm_crtc: ensure dma_fence_ops remain valid during device unbind drm/drm_crtc: fix race with dma_fence_signal() in ::get_driver_name() drivers/gpu/drm/drm_crtc.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- base-commit: b9810cd75b9fb56a3425d391cba3f608502bd474 change-id: 20260618-linux-drm_crtc_fix2-23a7c354a412 Best regards, -- André Draszik