Re: [PATCH] drm/amdgpu: fix metadata_size for ubo ioctl queries

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On 5/24/21 1:52 PM, Shiwu Zhang wrote:
Although the kfd_ioctl_get_dmabuf_info() still fail it will indicate
the caller right metadat_size useful for the same kfd ioctl next time.

v2: free the metadata buffer for sg type when to destroy BOs.

Signed-off-by: Shiwu Zhang <shiwu.zhang@xxxxxxx>
---
  drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 7 ++++---
  1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 3f85ba8222ef..e9f8701fd046 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -95,7 +95,7 @@ static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
  	}
  	amdgpu_bo_unref(&bo->parent);
- if (bo->tbo.type == ttm_bo_type_device) {
+	if (bo->tbo.type != ttm_bo_type_kernel) {
  		ubo = to_amdgpu_bo_user(bo);
  		kfree(ubo->metadata);
  	}


This should be a separate patch, it is unrelated to the below hunk.


@@ -1213,6 +1213,9 @@ int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
  	ubo = to_amdgpu_bo_user(bo);
+	if (metadata_size)
+		*metadata_size = ubo->metadata_size;
+
  	if (buffer) {
  		if (buffer_size < ubo->metadata_size)
  			return -EINVAL;
@@ -1221,8 +1224,6 @@ int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
  			memcpy(buffer, ubo->metadata, ubo->metadata_size);
  	}
- if (metadata_size)
-		*metadata_size = ubo->metadata_size;
  	if (flags)
  		*flags = ubo->metadata_flags;
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