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-rw-r--r--drivers/gpu/drm/drm_dp_mst_topology.c13
-rw-r--r--include/drm/drm_dp_mst_helper.h1
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 6537908050d7..5020a2aaffeb 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 fdb47051d549..c49bbfaf3cbb 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;