[PATCH] hwspinlock: propagate errno when registering single lock

[Wolfram Sang]

hwspin_lock_register_single() always returns 0 despite checking the
result from radix_tree_insert(). Propagate the errno to make sanity
checks in callers of this function actually meaningful.

Fixes: 300bab9770e2 ("hwspinlock/core: register a bank of hwspinlocks in a 
single API call")
Link: 
https://sashiko.dev/#/patchset/20260319105947.6237-1-wsa%2Brenesas%40sang-engineering.com
 # review of patch 14
Signed-off-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
---
 drivers/hwspinlock/hwspinlock_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwspinlock/hwspinlock_core.c 
b/drivers/hwspinlock/hwspinlock_core.c
index cc8e952a6772..a509b73da190 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -472,7 +472,7 @@ static int hwspin_lock_register_single(struct hwspinlock 
*hwlock, int id)
 
 out:
        mutex_unlock(&hwspinlock_tree_lock);
-       return 0;
+       return ret;
 }
 
 static struct hwspinlock *hwspin_lock_unregister_single(unsigned int id)
-- 
2.47.3