[PATCH] slimbus: messaging: Fix runtime PM leak in slim_do_transfer()

[Wentao Liang]

slim_do_transfer() takes a runtime PM reference with
pm_runtime_get_sync() before allocating a transaction id.  The
slim_alloc_txn_tid() failure path returns directly, skipping the
slim_xfer_err cleanup that drops this reference.

Jump to slim_xfer_err so the reference is always released.

Fixes: d3062a210930 ("slimbus: messaging: add slim_alloc/free_txn_tid()")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/slimbus/messaging.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/slimbus/messaging.c b/drivers/slimbus/messaging.c
index e2dbe4a66b70..ee127ef42046 100644
--- a/drivers/slimbus/messaging.c
+++ b/drivers/slimbus/messaging.c
@@ -139,7 +139,7 @@ int slim_do_transfer(struct slim_controller *ctrl, struct slim_msg_txn *txn)
 	if (need_tid) {
 		ret = slim_alloc_txn_tid(ctrl, txn);
 		if (ret)
-			return ret;
+			goto slim_xfer_err;
 
 		if (!txn->msg->comp)
 			txn->comp = &done;
-- 
2.34.1