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From bb1cfe5bf25e128d6f8df0bd9ecc999cb58164a7 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 22 Dec 2019 21:02:54 +0000
Subject: [PATCH 09/12] drm/i915: Add a simple is-bound check before unbinding
Only acquire the various atomic references required to unbind the vma if
we do need to unbind the vma.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191222210256.2066451-1-chris@chris-wilson.co.uk
---
drivers/gpu/drm/i915/i915_gem.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index c2c025c4f4ad..83eed642cbcd 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -145,6 +145,10 @@ int i915_gem_object_unbind(struct drm_i915_gem_object *obj,
struct i915_address_space *vm = vma->vm;
bool awake = false;
+ list_move_tail(&vma->obj_link, &still_in_list);
+ if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK))
+ continue;
+
ret = -EAGAIN;
if (!i915_vm_tryopen(vm))
break;
@@ -160,7 +164,6 @@ int i915_gem_object_unbind(struct drm_i915_gem_object *obj,
}
}
- list_move_tail(&vma->obj_link, &still_in_list);
spin_unlock(&obj->vma.lock);
ret = -EBUSY;
--
2.25.2
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