[PATCH libdrm] amdgpu: When couldn't find bo, need to return error.

[Christian König]

Am 01.09.2018 um 06:24 schrieb Emily Deng:
> The startx will have segmant fault if return success.
>
> SWDEV-163962
>
> Change-Id: I56b189fa26efdcd1d96e5100af3f3e0b1208b0c3
> Signed-off-by: Emily Deng <Emily.Deng at amd.com>

Jerry already send a much better patch for this.

> ---
>   amdgpu/amdgpu_bo.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/amdgpu/amdgpu_bo.c b/amdgpu/amdgpu_bo.c
> index f25cacc..7e297fa 100644
> --- a/amdgpu/amdgpu_bo.c
> +++ b/amdgpu/amdgpu_bo.c
> @@ -760,6 +760,7 @@ int amdgpu_find_bo_by_cpu_mapping(amdgpu_device_handle dev,
>   				  uint64_t *offset_in_bo)
>   {
>   	uint32_t i;
> +	int r = 0;
>   	struct amdgpu_bo *bo;
>   
>   	if (cpu == NULL || size == 0)
> @@ -787,10 +788,11 @@ int amdgpu_find_bo_by_cpu_mapping(amdgpu_device_handle dev,
>   	} else {
>   		*buf_handle = NULL;
>   		*offset_in_bo = 0;
> +		r = -errno;

errno doesn't contain any error in this case.

>   	}
>   	pthread_mutex_unlock(&dev->bo_table_mutex);
>   
> -	return 0;
> +	return r;
>   }
>   
>   int amdgpu_create_bo_from_user_mem(amdgpu_device_handle dev,