[PATCH next] drm/amdgpu/userq: Call unreserve on error in amdgpu_userq_fence_read_wptr()

[Dan Carpenter]

This error path should call amdgpu_bo_unreserve() before returning.

Fixes: d8675102ba32 ("drm/amdgpu: add vm root BO lock before accessing the vm")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
index be068e8e37d1..57169a8224be 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
@@ -373,6 +373,7 @@ static int amdgpu_userq_fence_read_wptr(struct 
amdgpu_usermode_queue *queue,
 
        mapping = amdgpu_vm_bo_lookup_mapping(queue->vm, addr >> PAGE_SHIFT);
        if (!mapping) {
+               amdgpu_bo_unreserve(queue->vm->root.bo);
                DRM_ERROR("Failed to lookup amdgpu_bo_va_mapping\n");
                return -EINVAL;
        }
-- 
2.47.2