[PATCH 05/13] drm/dp_mst: Fill branch->num_ports
mikita.lipski at amd.com
mikita.lipski at amd.com
Tue Oct 29 13:52:37 UTC 2019
From: David Francis <David.Francis at amd.com>
This field on drm_dp_mst_branch was never filled
It is initialized to zero when the port is kzallocced.
When a port is added to the list, increment num_ports,
and when a port is removed from the list, decrement num_ports.
v2: remember to decrement on port removal
v3: don't explicitly init to 0
Reviewed-by: Lyude Paul <lyude at redhat.com>
Reviewed-by: Harry Wentland <harry.wentland at amd.com>
Signed-off-by: David Francis <David.Francis at amd.com>
---
drivers/gpu/drm/drm_dp_mst_topology.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 9f3604355705..502923c24450 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1669,6 +1669,7 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
mutex_lock(&mstb->mgr->lock);
drm_dp_mst_topology_get_port(port);
list_add(&port->next, &mstb->ports);
+ mstb->num_ports++;
mutex_unlock(&mstb->mgr->lock);
}
@@ -1703,6 +1704,7 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
/* remove it from the port list */
mutex_lock(&mstb->mgr->lock);
list_del(&port->next);
+ mstb->num_ports--;
mutex_unlock(&mstb->mgr->lock);
/* drop port list reference */
drm_dp_mst_topology_put_port(port);
--
2.17.1
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