[PATCH libdrm] amdgpu: add error return value for finding bo by cpu mapping

[Jerry.Zhang@xxxxxxx (Zhang, Jerry (Junwei))]

On 08/30/2018 04:57 PM, Michel Dänzer wrote:
> On 2018-08-30 10:50 a.m., Junwei Zhang wrote:
>> If nothing is found, error should be returned.
>>
>> Signed-off-by: Junwei Zhang <Jerry.Zhang at amd.com>
>>
>> [...]
>>
>> @@ -577,10 +578,11 @@ int amdgpu_find_bo_by_cpu_mapping(amdgpu_device_handle dev,
>>   	} else {
>>   		*buf_handle = NULL;
>>   		*offset_in_bo = 0;
>> +		r = -EINVAL;
>
> I think -ENOENT would be better, to differentiate this error from
> passing invalid pointer / size parameters.

Mmm, good point, perhaps ENXIO is better,
which is used in amdgpu ttm for address out of existing range.

#define ENOENT           2      /* No such file or directory */
#define ENXIO            6      /* No such device or address */

Regards,
Jerry

>
> With that,
>
> Reviewed-by: Michel Dänzer <michel.daenzer at amd.com>
>
>