From: Abel Vesa <abel.vesa@xxxxxxxxxx>
commit 85e444a68126a631221ae32c63fce882bb18a262 upstream.
The assignment of the of_node to the aux bridge needs to mark the
of_node as reused as well, otherwise resource providers like pinctrl will
report a gpio as already requested by a different device when both pinconf
and gpios property are present.
Fix that by using the device_set_of_node_from_dev() helper instead.
Fixes: 6914968a0b52 ("drm/bridge: properly refcount DT nodes in aux bridge drivers")
Cc: stable@xxxxxxxxxxxxxxx # 6.8
Cc: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20241018-drm-aux-bridge-mark-of-node-reused-v2-1-aeed1b445c7d@xxxxxxxxxx
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241018-drm-aux-bridge-mark-of-node-reused-v2-1-aeed1b445c7d@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/aux-bridge.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/bridge/aux-bridge.c
+++ b/drivers/gpu/drm/bridge/aux-bridge.c
@@ -58,9 +58,10 @@ int drm_aux_bridge_register(struct devic
adev->id = ret;
adev->name = "aux_bridge";
adev->dev.parent = parent;
- adev->dev.of_node = of_node_get(parent->of_node);
adev->dev.release = drm_aux_bridge_release;
+ device_set_of_node_from_dev(&adev->dev, parent);
+
ret = auxiliary_device_init(adev);
if (ret) {
ida_free(&drm_aux_bridge_ida, adev->id);
Patches currently in stable-queue which might be from abel.vesa@xxxxxxxxxx are
queue-6.11/drm-bridge-fix-assignment-of-the-of_node-of-the-parent-to-aux-bridge.patch
