1 files changed, 0 insertions, 74 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch b/target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch
deleted file mode 100644
index 064e1170ed..0000000000
--- a/target/linux/brcm2708/patches-4.4/0097-drm-vc4-Drop-struct_mutex-around-CL-validation.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-From f1924e632d16f98eee1fe1be636249b8cee4ee6e Mon Sep 17 00:00:00 2001
-From: Eric Anholt <eric@anholt.net>
-Date: Mon, 19 Oct 2015 08:44:35 -0700
-Subject: [PATCH 097/170] drm/vc4: Drop struct_mutex around CL validation.
-
-We were using it so that we could make sure that shader validation
-state didn't change while we were validating, but now shader
-validation state is immutable.  The bcl/rcl generation doesn't do any
-other BO dereferencing, and seems to have no other global state
-dependency not covered by job_lock / bo_lock.  We only need to hold
-struct_mutex for object unreferencing.
-
-Fixes a lock order reversal between mmap_sem and struct_mutex.
-
-Signed-off-by: Eric Anholt <eric@anholt.net>
----
- drivers/gpu/drm/vc4/vc4_gem.c | 13 ++++++-------
- 1 file changed, 6 insertions(+), 7 deletions(-)
-
---- a/drivers/gpu/drm/vc4/vc4_gem.c
-+++ b/drivers/gpu/drm/vc4/vc4_gem.c
-@@ -439,10 +439,12 @@ fail:
- }
- 
- static void
--vc4_complete_exec(struct vc4_exec_info *exec)
-+vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec)
- {
- 	unsigned i;
- 
-+	/* Need the struct lock for drm_gem_object_unreference(). */
-+	mutex_lock(&dev->struct_mutex);
- 	if (exec->bo) {
- 		for (i = 0; i < exec->bo_count; i++)
- 			drm_gem_object_unreference(&exec->bo[i].bo->base);
-@@ -455,6 +457,7 @@ vc4_complete_exec(struct vc4_exec_info *
- 		list_del(&bo->unref_head);
- 		drm_gem_object_unreference(&bo->base.base);
- 	}
-+	mutex_unlock(&dev->struct_mutex);
- 
- 	kfree(exec);
- }
-@@ -473,7 +476,7 @@ vc4_job_handle_completed(struct vc4_dev
- 		list_del(&exec->head);
- 
- 		spin_unlock_irqrestore(&vc4->job_lock, irqflags);
--		vc4_complete_exec(exec);
-+		vc4_complete_exec(vc4->dev, exec);
- 		spin_lock_irqsave(&vc4->job_lock, irqflags);
- 	}
- 
-@@ -525,12 +528,8 @@ vc4_job_done_work(struct work_struct *wo
- {
- 	struct vc4_dev *vc4 =
- 		container_of(work, struct vc4_dev, job_done_work);
--	struct drm_device *dev = vc4->dev;
- 
--	/* Need the struct lock for drm_gem_object_unreference(). */
--	mutex_lock(&dev->struct_mutex);
- 	vc4_job_handle_completed(vc4);
--	mutex_unlock(&dev->struct_mutex);
- }
- 
- static int
-@@ -639,7 +638,7 @@ vc4_submit_cl_ioctl(struct drm_device *d
- 	return 0;
- 
- fail:
--	vc4_complete_exec(exec);
-+	vc4_complete_exec(vc4->dev, exec);
- 
- 	return ret;
- }