drm/amdgpu: fix metadata_size for ubo ioctl queries

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.

Signed-off-by: Shiwu Zhang <shiwu.zhang@amd.com>
Reviewed-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 6b09d79..9fcb3bc 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -1197,6 +1197,9 @@ 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;
@@ -1205,8 +1208,6 @@ 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;