[PATCH 11/23] drm/amdgpu: check function points valid before use. (v2)

[Christian König]

Am 09.03.2017 um 16:25 schrieb Alex Deucher:
> From: Rex Zhu <Rex.Zhu at amd.com>
>
> v2: agd: integrate Christian's comments.
>
> Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 26 ++++++++++++--------------
>   1 file changed, 12 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 641c286..1c854c0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -1191,13 +1191,12 @@ int amdgpu_set_clockgating_state(struct amdgpu_device *adev,
>   	for (i = 0; i < adev->num_ip_blocks; i++) {
>   		if (!adev->ip_blocks[i].status.valid)
>   			continue;
> -		if (adev->ip_blocks[i].version->type == block_type) {
> -			r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
> -										     state);
> -			if (r)
> -				return r;
> -			break;
> -		}
> +		if (adev->ip_blocks[i].version->type != block_type)
> +			continue;
> +		if (!adev->ip_blocks[i].version->funcs->set_clockgating_state)
> +			continue;
> +		r = adev->ip_blocks[i].version->funcs->set_clockgating_state(
> +			(void *)adev, state);

Aren't we missing the "if (r) return r" now? Not that it makes much 
difference, cause we currently only have one block of each type, don't we?

Christian.

>   	}
>   	return r;
>   }
> @@ -1211,13 +1210,12 @@ int amdgpu_set_powergating_state(struct amdgpu_device *adev,
>   	for (i = 0; i < adev->num_ip_blocks; i++) {
>   		if (!adev->ip_blocks[i].status.valid)
>   			continue;
> -		if (adev->ip_blocks[i].version->type == block_type) {
> -			r = adev->ip_blocks[i].version->funcs->set_powergating_state((void *)adev,
> -										     state);
> -			if (r)
> -				return r;
> -			break;
> -		}
> +		if (adev->ip_blocks[i].version->type != block_type)
> +			continue;
> +		if (!adev->ip_blocks[i].version->funcs->set_powergating_state)
> +			continue;
> +		r = adev->ip_blocks[i].version->funcs->set_powergating_state(
> +			(void *)adev, state);
>   	}
>   	return r;
>   }