From cb021a3eb6e9870d2f3539e37d8b6de4c9d919f6 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 15 Jul 2016 21:48:03 +0200 Subject: [PATCH] drm/dp-mst: Remove tx_down_in_progress Just replicates whether the list is empty or not. Nuke code to avoid writing docs for it! Cc: Dave Airlie Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1468612088-9721-6-git-send-email-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_dp_mst_topology.c | 13 +++---------- include/drm/drm_dp_mst_helper.h | 1 - 2 files changed, 3 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 6537908..5020a2a 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -1493,11 +1493,8 @@ static void process_single_down_tx_qlock(struct drm_dp_mst_topology_mgr *mgr) WARN_ON(!mutex_is_locked(&mgr->qlock)); /* construct a chunk from the first msg in the tx_msg queue */ - if (list_empty(&mgr->tx_msg_downq)) { - mgr->tx_down_in_progress = false; + if (list_empty(&mgr->tx_msg_downq)) return; - } - mgr->tx_down_in_progress = true; txmsg = list_first_entry(&mgr->tx_msg_downq, struct drm_dp_sideband_msg_tx, next); ret = process_single_tx_qlock(mgr, txmsg, false); @@ -1512,10 +1509,6 @@ static void process_single_down_tx_qlock(struct drm_dp_mst_topology_mgr *mgr) txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT; wake_up(&mgr->tx_waitq); } - if (list_empty(&mgr->tx_msg_downq)) { - mgr->tx_down_in_progress = false; - return; - } } /* called holding qlock */ @@ -1538,7 +1531,7 @@ static void drm_dp_queue_down_tx(struct drm_dp_mst_topology_mgr *mgr, { mutex_lock(&mgr->qlock); list_add_tail(&txmsg->next, &mgr->tx_msg_downq); - if (!mgr->tx_down_in_progress) + if (list_is_singular(&mgr->tx_msg_downq)) process_single_down_tx_qlock(mgr); mutex_unlock(&mgr->qlock); } @@ -2887,7 +2880,7 @@ static void drm_dp_tx_work(struct work_struct *work) struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, tx_work); mutex_lock(&mgr->qlock); - if (mgr->tx_down_in_progress) + if (!list_empty(&mgr->tx_msg_downq)) process_single_down_tx_qlock(mgr); mutex_unlock(&mgr->qlock); } diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h index fdb4705..c49bbfa 100644 --- a/include/drm/drm_dp_mst_helper.h +++ b/include/drm/drm_dp_mst_helper.h @@ -446,7 +446,6 @@ struct drm_dp_mst_topology_mgr { the mstb tx_slots and txmsg->state once they are queued */ struct mutex qlock; struct list_head tx_msg_downq; - bool tx_down_in_progress; /* payload info + lock for it */ struct mutex payload_lock; -- 2.7.4