[PATCH 2/2] drm/ttm: Use debugfs_remove_recursive to remove ttm directory

[Ma, Jun]

On 1/13/2023 5:38 PM, Christian König wrote:
> Am 13.01.23 um 06:34 schrieb Ma Jun:
>> Use debugfs_remove_recursive to remove the /sys/kernel/debug/ttm
>> directory for better compatibility. Becuase debugfs_remove fails
>> on older kernel.
> 
> Again NAK for upstreaming.
> 
> The upstream kernel is made for the newest kernel version and should not 
> contain any compatibility handling for older kernels.
> 
Yes, generally so.

But the debugfs_remove_recursive() and debugfs_remove() are same function now.
The debugfs_remove_recursive is used here so that we don't need to make kcl patch
for it.

Regards,
Ma Jun

> Christian.
> 
>>
>> Signed-off-by: Ma Jun <Jun.Ma2 at amd.com>
>> ---
>>   drivers/gpu/drm/ttm/ttm_device.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
>> index 967bc2244df3..590297123bb2 100644
>> --- a/drivers/gpu/drm/ttm/ttm_device.c
>> +++ b/drivers/gpu/drm/ttm/ttm_device.c
>> @@ -55,7 +55,7 @@ static void ttm_global_release(void)
>>   		goto out;
>>   
>>   	ttm_pool_mgr_fini();
>> -	debugfs_remove(ttm_debugfs_root);
>> +	debugfs_remove_recursive(ttm_debugfs_root);
>>   
>>   	__free_page(glob->dummy_read_page);
>>   	memset(glob, 0, sizeof(*glob));
>