Allow NULL pointers at amdgpu_vm_put_task_info() as it common practice
for "put" or "free" functions. This avoid an extra check for NULL for
callers.

Signed-off-by: André Almeida <andrealmeid@igalia.com>
---
v9: use if (task) instead of if (ZERO_OR_NULL_PTR(task))
v8: New patch
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 3911c78f8282..de914a39e3f6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2447,7 +2447,8 @@ amdgpu_vm_get_vm_from_pasid(struct amdgpu_device *adev, u32 pasid)
  */
 void amdgpu_vm_put_task_info(struct amdgpu_task_info *task_info)
 {
-	kref_put(&task_info->refcount, amdgpu_vm_destroy_task_info);
+	if (task_info)
+		kref_put(&task_info->refcount, amdgpu_vm_destroy_task_info);
 }
 
 /**
-- 
2.49.0

On 6/17/25 14:49, André Almeida wrote:
> Allow NULL pointers at amdgpu_vm_put_task_info() as it common practice
> for "put" or "free" functions. This avoid an extra check for NULL for
> callers.
> 
> Signed-off-by: André Almeida <andrealmeid@igalia.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
> v9: use if (task) instead of if (ZERO_OR_NULL_PTR(task))
> v8: New patch
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index 3911c78f8282..de914a39e3f6 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -2447,7 +2447,8 @@ amdgpu_vm_get_vm_from_pasid(struct amdgpu_device *adev, u32 pasid)
>   */
>  void amdgpu_vm_put_task_info(struct amdgpu_task_info *task_info)
>  {
> -	kref_put(&task_info->refcount, amdgpu_vm_destroy_task_info);
> +	if (task_info)
> +		kref_put(&task_info->refcount, amdgpu_vm_destroy_task_info);
>  }
>  
>  /**