[PATCH 1/2] drm/dp_mst: make functions that always return 0 return void.

[Daniel Vetter]

On Sun, Sep 06, 2015 at 06:52:59PM +1000, Dave Airlie wrote:
> This just drops the return and assigning it to a len variable
> that never gets used.
> 
> Signed-off-by: Dave Airlie <airlied at redhat.com>

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> ---
>  drivers/gpu/drm/drm_dp_mst_topology.c | 29 ++++++++++-------------------
>  1 file changed, 10 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index e23df5f..294d904 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -631,7 +631,7 @@ static bool drm_dp_sideband_parse_req(struct drm_dp_sideband_msg_rx *raw,
>  	}
>  }
>  
> -static int build_dpcd_write(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 offset, u8 num_bytes, u8 *bytes)
> +static void build_dpcd_write(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 offset, u8 num_bytes, u8 *bytes)
>  {
>  	struct drm_dp_sideband_msg_req_body req;
>  
> @@ -641,20 +641,17 @@ static int build_dpcd_write(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32
>  	req.u.dpcd_write.num_bytes = num_bytes;
>  	req.u.dpcd_write.bytes = bytes;
>  	drm_dp_encode_sideband_req(&req, msg);
> -
> -	return 0;
>  }
>  
> -static int build_link_address(struct drm_dp_sideband_msg_tx *msg)
> +static void build_link_address(struct drm_dp_sideband_msg_tx *msg)
>  {
>  	struct drm_dp_sideband_msg_req_body req;
>  
>  	req.req_type = DP_LINK_ADDRESS;
>  	drm_dp_encode_sideband_req(&req, msg);
> -	return 0;
>  }
>  
> -static int build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg, int port_num)
> +static void build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg, int port_num)
>  {
>  	struct drm_dp_sideband_msg_req_body req;
>  
> @@ -662,10 +659,9 @@ static int build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg, int por
>  	req.u.port_num.port_number = port_num;
>  	drm_dp_encode_sideband_req(&req, msg);
>  	msg->path_msg = true;
> -	return 0;
>  }
>  
> -static int build_allocate_payload(struct drm_dp_sideband_msg_tx *msg, int port_num,
> +static void build_allocate_payload(struct drm_dp_sideband_msg_tx *msg, int port_num,
>  				  u8 vcpi, uint16_t pbn)
>  {
>  	struct drm_dp_sideband_msg_req_body req;
> @@ -676,7 +672,6 @@ static int build_allocate_payload(struct drm_dp_sideband_msg_tx *msg, int port_n
>  	req.u.allocate_payload.pbn = pbn;
>  	drm_dp_encode_sideband_req(&req, msg);
>  	msg->path_msg = true;
> -	return 0;
>  }
>  
>  static int drm_dp_mst_assign_payload_id(struct drm_dp_mst_topology_mgr *mgr,
> @@ -1461,7 +1456,6 @@ static void drm_dp_queue_down_tx(struct drm_dp_mst_topology_mgr *mgr,
>  static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
>  				    struct drm_dp_mst_branch *mstb)
>  {
> -	int len;
>  	struct drm_dp_sideband_msg_tx *txmsg;
>  	int ret;
>  
> @@ -1470,7 +1464,7 @@ static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
>  		return -ENOMEM;
>  
>  	txmsg->dst = mstb;
> -	len = build_link_address(txmsg);
> +	build_link_address(txmsg);
>  
>  	drm_dp_queue_down_tx(mgr, txmsg);
>  
> @@ -1510,7 +1504,6 @@ static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr,
>  					   struct drm_dp_mst_branch *mstb,
>  					   struct drm_dp_mst_port *port)
>  {
> -	int len;
>  	struct drm_dp_sideband_msg_tx *txmsg;
>  	int ret;
>  
> @@ -1519,7 +1512,7 @@ static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr,
>  		return -ENOMEM;
>  
>  	txmsg->dst = mstb;
> -	len = build_enum_path_resources(txmsg, port->port_num);
> +	build_enum_path_resources(txmsg, port->port_num);
>  
>  	drm_dp_queue_down_tx(mgr, txmsg);
>  
> @@ -1547,7 +1540,7 @@ static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr,
>  {
>  	struct drm_dp_sideband_msg_tx *txmsg;
>  	struct drm_dp_mst_branch *mstb;
> -	int len, ret;
> +	int ret;
>  
>  	mstb = drm_dp_get_validated_mstb_ref(mgr, port->parent);
>  	if (!mstb)
> @@ -1560,9 +1553,8 @@ static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr,
>  	}
>  
>  	txmsg->dst = mstb;
> -	len = build_allocate_payload(txmsg, port->port_num,
> -				     id,
> -				     pbn);
> +	build_allocate_payload(txmsg, port->port_num,
> +			       id, pbn);
>  
>  	drm_dp_queue_down_tx(mgr, txmsg);
>  
> @@ -1772,7 +1764,6 @@ static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,
>  				  struct drm_dp_mst_port *port,
>  				  int offset, int size, u8 *bytes)
>  {
> -	int len;
>  	int ret;
>  	struct drm_dp_sideband_msg_tx *txmsg;
>  	struct drm_dp_mst_branch *mstb;
> @@ -1787,7 +1778,7 @@ static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,
>  		goto fail_put;
>  	}
>  
> -	len = build_dpcd_write(txmsg, port->port_num, offset, size, bytes);
> +	build_dpcd_write(txmsg, port->port_num, offset, size, bytes);
>  	txmsg->dst = mstb;
>  
>  	drm_dp_queue_down_tx(mgr, txmsg);
> -- 
> 2.4.3
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch