[PATCH 6.6] thermal/of: Fix mask mismatch when no trips subnode

[Hsin-Te Yuan]

After commit 725f31f300e3 ("thermal/of: support thermal zones w/o trips
subnode") was backported on 6.6 stable branch as commit d3304dbc2d5f
("thermal/of: support thermal zones w/o trips subnode"), thermal zones
w/o trips subnode still fail to register since `mask` argument is not
set correctly. When number of trips subnode is 0, `mask` must be 0 to
pass the check in `thermal_zone_device_register_with_trips()`.

Set `mask` to 0 when there's no trips subnode.

Signed-off-by: Hsin-Te Yuan <yuanhsinte@xxxxxxxxxxxx>
---
 drivers/thermal/thermal_of.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 0f520cf923a1e684411a3077ad283551395eec11..97aeb869abf5179dfa512dd744725121ec7fd0d9 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -514,7 +514,7 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node *
 	of_ops->bind = thermal_of_bind;
 	of_ops->unbind = thermal_of_unbind;
 
-	mask = GENMASK_ULL((ntrips) - 1, 0);
+	mask = ntrips ? GENMASK_ULL((ntrips) - 1, 0) : 0;
 
 	tz = thermal_zone_device_register_with_trips(np->name, trips, ntrips,
 						     mask, data, of_ops, &tzp,

---
base-commit: a5df3a702b2cba82bcfb066fa9f5e4a349c33924
change-id: 20250707-trip-point-73dae9fd9c74

Best regards,
-- 
Hsin-Te Yuan <yuanhsinte@xxxxxxxxxxxx>