[PATCH v2 10/27] drm/dp_mst: Remove huge conditional in drm_dp_mst_handle_up_req()

Lyude Paul
2019-09-03T20:48:23Z

Which reduces indentation and makes this function more legible.

Cc: Juston Li <juston.li@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Harry Wentland <hwentlan@amd.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
drivers/gpu/drm/drm_dp_mst_topology.c | 90 +++++++++++++--------------
1 file changed, 45 insertions(+), 45 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 241c66f75bed..43452872efad 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -3245,7 +3245,9 @@ static int drm_dp_mst_handle_down_rep(struct drm_dp_mst_topology_mgr *mgr)

static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
{
- int ret = 0;
+ struct drm_dp_sideband_msg_req_body msg;
+ struct drm_dp_mst_branch *mstb = NULL;
+ bool seqno;

if (!drm_dp_get_one_sb_msg(mgr, true)) {
memset(&mgr->up_req_recv, 0,
@@ -3253,62 +3255,60 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
return 0;
}

- if (mgr->up_req_recv.have_eomt) {
- struct drm_dp_sideband_msg_req_body msg;
- struct drm_dp_mst_branch *mstb = NULL;
- bool seqno;
-
- if (!mgr->up_req_recv.initial_hdr.broadcast) {
- mstb = drm_dp_get_mst_branch_device(mgr,
- mgr->up_req_recv.initial_hdr.lct,
- mgr->up_req_recv.initial_hdr.rad);
- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
+ if (!mgr->up_req_recv.have_eomt)
+ return 0;
+
+ if (!mgr->up_req_recv.initial_hdr.broadcast) {
+ mstb = drm_dp_get_mst_branch_device(mgr,
+ mgr->up_req_recv.initial_hdr.lct,
+ mgr->up_req_recv.initial_hdr.rad);
+ if (!mstb) {
+ DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
+ memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+ return 0;
}
+ }

- seqno = mgr->up_req_recv.initial_hdr.seqno;
- drm_dp_sideband_parse_req(&mgr->up_req_recv, &msg);
+ seqno = mgr->up_req_recv.initial_hdr.seqno;
+ drm_dp_sideband_parse_req(&mgr->up_req_recv, &msg);

- if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY) {
- drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
+ if (msg.req_type == DP_CONNECTION_STATUS_NOTIFY) {
+ drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);

- if (!mstb)
- mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.conn_stat.guid);
+ if (!mstb)
+ mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.conn_stat.guid);

- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
+ if (!mstb) {
+ DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
+ memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+ return 0;
+ }

- drm_dp_update_port(mstb, &msg.u.conn_stat);
+ drm_dp_update_port(mstb, &msg.u.conn_stat);

- DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type);
- drm_kms_helper_hotplug_event(mgr->dev);
-
- } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
- drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
- if (!mstb)
- mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.resource_stat.guid);
+ DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type);
+ drm_kms_helper_hotplug_event(mgr->dev);

- if (!mstb) {
- DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
- return 0;
- }
+ } else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
+ drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
+ if (!mstb)
+ mstb = drm_dp_get_mst_branch_device_by_guid(mgr, msg.u.resource_stat.guid);

- DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n", msg.u.resource_stat.port_number, msg.u.resource_stat.available_pbn);
+ if (!mstb) {
+ DRM_DEBUG_KMS("Got MST reply from unknown device %d\n", mgr->up_req_recv.initial_hdr.lct);
+ memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+ return 0;
}

- if (mstb)
- drm_dp_mst_topology_put_mstb(mstb);
-
- memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+ DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n", msg.u.resource_stat.port_number, msg.u.resource_stat.available_pbn);
}
- return ret;
+
+ if (mstb)
+ drm_dp_mst_topology_put_mstb(mstb);
+
+ memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
+
+ return 0;
}

/**
--
2.21.0