[PATCH v10 14/23] drm/i915/vm_bind: Update i915_vma_verify_bind_complete()

[Niranjana Vishwanathapura]

Ensure i915_vma_verify_bind_complete() handles case where bind
is not initiated. Also make it non static, add documentation
and move it out of CONFIG_DRM_I915_DEBUG_GEM.

v2: Fix fence leak

Reviewed-by: Matthew Auld <matthew.a...@intel.com>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathap...@intel.com>
Signed-off-by: Andi Shyti <andi.sh...@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_vma.c | 22 ++++++++++++++++------
 drivers/gpu/drm/i915/i915_vma.h |  1 +
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 763ead20ad55..804f01b9002d 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -441,12 +441,25 @@ int i915_vma_sync(struct i915_vma *vma)
        return i915_vm_sync(vma->vm);
 }
 
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)
-static int i915_vma_verify_bind_complete(struct i915_vma *vma)
+/**
+ * i915_vma_verify_bind_complete() - Check for the bind completion of the vma
+ * @vma: vma to check for bind completion
+ *
+ * As the fence reference is obtained under RCU, no locking is required by
+ * the caller.
+ *
+ * Returns: 0 if the vma bind is completed. Error code otherwise.
+ */
+int i915_vma_verify_bind_complete(struct i915_vma *vma)
 {
-       struct dma_fence *fence = i915_active_fence_get(&vma->active.excl);
+       struct dma_fence *fence;
        int err;
 
+       /* Ensure vma bind is initiated */
+       if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK))
+               return -EINVAL;
+
+       fence = i915_active_fence_get(&vma->active.excl);
        if (!fence)
                return 0;
 
@@ -459,9 +472,6 @@ static int i915_vma_verify_bind_complete(struct i915_vma 
*vma)
 
        return err;
 }
-#else
-#define i915_vma_verify_bind_complete(_vma) 0
-#endif
 
 I915_SELFTEST_EXPORT void
 i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res,
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index de1756e4f638..1f25e45a6325 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -487,6 +487,7 @@ void i915_vma_make_purgeable(struct i915_vma *vma);
 
 int i915_vma_wait_for_bind(struct i915_vma *vma);
 int i915_vma_sync(struct i915_vma *vma);
+int i915_vma_verify_bind_complete(struct i915_vma *vma);
 
 /**
  * i915_vma_get_current_resource - Get the current resource of the vma
-- 
2.21.0.rc0.32.g243a4c7e27