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Wed, 02 Sep 2026 13:16:51 -0700 (PDT) Received: from hu-mojha-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33256414c60sm497205eec.24.2026.09.02.13.16.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Sep 2026 13:16:51 -0700 (PDT) From: Mukesh Ojha To: Liviu Dudau , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Joel Stanley , Andrew Jeffery , Paul Cercueil , Anitha Chrisanthus , Paul Kocialkowski , Linus Walleij , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Alexey Brodkin , Laurent Pinchart , Tomi Valkeinen , Michal Simek Cc: Ryan Chen , Billy Tsai , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-aspeed@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-sunxi@lists.linux.dev, Mukesh Ojha Subject: [PATCH v2 0/11] drm: Use devm_of_reserved_mem_device_init() Date: Thu, 3 Sep 2026 01:46:29 +0530 Message-ID: <20260902201640.2024648-1-mukesh.ojha@oss.qualcomm.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Authority-Analysis: v=2.4 cv=H4/rBeYi c=1 sm=1 tr=0 ts=6a988435 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=nZq82LKI3H6k8voUjgcA:9 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-GUID: wgtUOu8eT5Zp_-Yrer850BNLlWuxTb2E X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAyMDE3OSBTYWx0ZWRfX47kqWKHH1VLB 8KbWGcdum5pNmijhWbATvrxsxTuCM/Yxjav6rscGYm23qPD/BqWc2tNdQvLI+bVIrF877zZPAsZ p64/GK2+UMonZ9vpcI0S8NX6Fjt3WudSpwtAfUd+qgVY/yPjM6KcOCuk6L/n4frYfmECty5uTk/ xLX4WM3fnStizyjpp112vwIZD1f7J6mwib0v4rYQNrm4qBAAS6P5lo6d9J9xd3rxodWalO9MzKX L9DuRST8Vr/kK4XSbTSDyP7YZ2fXRYQPCNi72A+WgcozbSwB6Ywo211JIf9icscHLCpIqfWA9/9 URGD8BoDKrqRVtZ8dl4qLmhvgT6OSIvlwhncPwohtSeUKHCWLMSrzDm19L0qgoKNguovwin6LRf 04QJHmqyuCjgmIUnmgFrOh26bRGNEKJEmezh0wdFLbHPDapo7Nai773fk4XTjNh3mdxVhfUdSTD 51ss8p1/JnJDBJPDCHA== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAyMDE3OSBTYWx0ZWRfX5cQrJwZoeRfY rVvIM3HYMxruiaHqclp55tHSzncuOGETGDpT9x3drzf+F58mvqlvvQyguIIDoWXuh6N2BOtL54o E9yqTv9v0HrjHsD0pIGbW+dAkgPQGhM= X-Proofpoint-ORIG-GUID: wgtUOu8eT5Zp_-Yrer850BNLlWuxTb2E X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-02_04,2026-09-02_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 bulkscore=0 clxscore=1015 malwarescore=0 spamscore=0 phishscore=0 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609020179 X-MORS-Enabled: yes X-MORS-DOMAIN: patchwork.local X-MORS-HOSTING: hosting172546 X-MORS-USER: hosting172546 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= Several DRM drivers manually manage reserved memory lifetime by pairing of_reserved_mem_device_init() with an explicit of_reserved_mem_device_release() in the remove or unbind path. Missing the release on any error path between the two calls leaks the region for the lifetime of the driver. devm_of_reserved_mem_device_init() was recently introduced to tie the release to the device's devres lifetime automatically. Convert the affected DRM drivers to use it. Note for drivers using the component framework (hdlcd, malidp, sun4i): the previous code called of_reserved_mem_device_release() explicitly in the component unbind callback. After conversion, the release happens at device removal (devm teardown) rather than at component unbind. For standard CMA or system heap reserved memory, this is benign. Drivers relying on custom rmem->ops with meaningful release-time side effects may need to retain an explicit release in unbind; those cases are not known to exist for the drivers converted here. Changes since v1: https://lore.kernel.org/lkml/20260703193855.110619-2-mukesh.ojha@oss.qualcomm.com/ - Carried R-b tag if any. - Rebased it. Mukesh Ojha (11): drm: logicvc: Use devm_of_reserved_mem_device_init() drm: hdlcd: Use devm_of_reserved_mem_device_init() drm: pl111: Use devm_of_reserved_mem_device_init() drm: komeda: Use devm_of_reserved_mem_device_init() drm: malidp: Use devm_of_reserved_mem_device_init() drm: ingenic: Use devm_of_reserved_mem_device_init() drm: kmb: Use devm_of_reserved_mem_device_init() drm: sun4i: Use devm_of_reserved_mem_device_init() drm: xlnx: zynqmp_dpsub: Use devm_of_reserved_mem_device_init() drm: aspeed: Use devm_of_reserved_mem_device_init() drm: arcpgu: Use devm_of_reserved_mem_device_init() drivers/gpu/drm/logicvc/logicvc_drm.c | 21 ++++++++------------- drivers/gpu/drm/arm/hdlcd_drv.c | 6 +----- drivers/gpu/drm/pl111/pl111_drv.c | 4 +--- drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 4 +--- drivers/gpu/drm/arm/malidp_drv.c | 4 +--- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 13 +------------ drivers/gpu/drm/kmb/kmb_drv.c | 12 ++---------- drivers/gpu/drm/sun4i/sun4i_drv.c | 4 +--- drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 4 +--- drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 2 +- drivers/gpu/drm/tiny/arcpgu.c | 2 +- 11 files changed, 14 insertions(+), 76 deletions(-) --- 2.34.1