linux-kernel - [PATCH v2 6.12 1/3] drm/managed: Add DRM-managed alloc_ordered

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Message-Id: <20250912120202.240305-1-mdmitrichenko@astralinux.ru>
Date: Fri, 12 Sep 2025 15:01:59 +0300
From: Mikhail Dmitrichenko <mdmitrichenko@...ralinux.ru>
To: stable@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Mikhail Dmitrichenko <mdmitrichenko@...ralinux.ru>,
	Michal Wajdeczko <michal.wajdeczko@...el.com>,
	Matthew Brost <matthew.brost@...el.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Francois Dugast <francois.dugast@...el.com>,
	intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	lvc-project@...uxtesting.org,
	Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH v2 6.12 1/3] drm/managed: Add DRM-managed alloc_ordered_workqueue

From: Louis Chauvet <louis.chauvet@...tlin.com>

commit c367b772e6d89d8c7b560c7df7e3803ce6b8bcea upstream.

Add drmm_alloc_ordered_workqueue(), a helper that provides managed ordered
workqueue cleanup. The workqueue will be destroyed with the final
reference of the DRM device.

Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>
Reviewed-by: Maxime Ripard <mripard@...nel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250116-google-vkms-managed-v9-3-3e4ae1bd05a0@bootlin.com
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
Signed-off-by: Mikhail Dmitrichenko <mdmitrichenko@...ralinux.ru>
---
 drivers/gpu/drm/drm_managed.c |  8 ++++++++
 include/drm/drm_managed.h     | 12 ++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
index 79ce86a5bd67..cc4c463daae7 100644
--- a/drivers/gpu/drm/drm_managed.c
+++ b/drivers/gpu/drm/drm_managed.c
@@ -310,3 +310,11 @@ void __drmm_mutex_release(struct drm_device *dev, void *res)
 	mutex_destroy(lock);
 }
 EXPORT_SYMBOL(__drmm_mutex_release);
+
+void __drmm_workqueue_release(struct drm_device *device, void *res)
+{
+	struct workqueue_struct *wq = res;
+
+	destroy_workqueue(wq);
+}
+EXPORT_SYMBOL(__drmm_workqueue_release);
diff --git a/include/drm/drm_managed.h b/include/drm/drm_managed.h
index f547b09ca023..53017cc609ac 100644
--- a/include/drm/drm_managed.h
+++ b/include/drm/drm_managed.h
@@ -127,4 +127,16 @@ void __drmm_mutex_release(struct drm_device *dev, void *res);
 	drmm_add_action_or_reset(dev, __drmm_mutex_release, lock);	     \
 })									     \
 
+void __drmm_workqueue_release(struct drm_device *device, void *wq);
+
+#define drmm_alloc_ordered_workqueue(dev, fmt, flags, args...)					\
+	({											\
+		struct workqueue_struct *wq = alloc_ordered_workqueue(fmt, flags, ##args);	\
+		wq ? ({										\
+			int ret = drmm_add_action_or_reset(dev, __drmm_workqueue_release, wq);	\
+			ret ? ERR_PTR(ret) : wq;						\
+		}) :										\
+			wq;									\
+	})
+
 #endif
-- 
2.39.2