[PATCH] drm/amdgpu: fix list not initialized

[zhoucm1]

On 2018年04月19日 09:48, Zhang, Jerry (Junwei) wrote:
> On 04/18/2018 06:37 PM, Chunming Zhou wrote:
>> Otherwise, cpu stuck for 22s with kernel panic.
>>
>> Change-Id: I5b87cde662a4658c9ab253ba88d009c9628a44ca
>> Signed-off-by: Chunming Zhou <david1.zhou at amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>> index f0fbc331aa30..7131ad13c5b5 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>> @@ -1563,10 +1563,9 @@ int amdgpu_vm_bo_update(struct amdgpu_device 
>> *adev,
>>            * the evicted list so that it gets validated again on the
>>            * next command submission.
>>            */
>> +        list_del_init(&bo_va->base.vm_status);
>>           if (!(bo->preferred_domains & 
>> amdgpu_mem_type_to_domain(mem_type)))
>>               list_add_tail(&bo_va->base.vm_status, &vm->evicted);
>> -        else
>> -            list_del_init(&bo_va->base.vm_status);
>>       } else {
>>           list_del_init(&bo_va->base.vm_status);
>>       }
> We may simplify the logic as below.
> How do you think?
>
>         list_del_init(&bo_va->base.vm_status);
>         unsigned mem_type = bo->tbo.mem.mem_type;
>         /* If the BO is not in its preferred location add it back to
>          * the evicted list so that it gets validated again on the
>          * next command submission.
>          */
>         if ((bo && bo->tbo.resv == vm->root.base.bo->tbo.resv) &&
>                 (!(bo->preferred_domains & 
> amdgpu_mem_type_to_domain(mem_type))))
> list_add_tail(&bo_va->base.vm_status, &vm->evicted);
Looks good, but I already pushed that patch just now. if you like, you 
can make a simplify patch with your idea.

Regards,
David Zhou
>
> Jerry
>
>>
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