clk: ti: Balance of_node_get() calls for of_find_node_by_name()

[ Upstream commit 058a399 ]

In ti_find_clock_provider(), of_find_node_by_name() will call
of_node_put() for the 'from' argument, possibly putting the node one too
many times. Let's maintain the of_node_get() from the previous search
and only put when we're exiting the function early. This should avoid a
misbalanced reference count on the node.

Fixes: 51f661e ("clk: ti: Add ti_find_clock_provider() to use clock-output-names")
Signed-off-by: Liang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220915031121.4003589-1-windhl@126.com
[sboyd@kernel.org: Rewrite commit text, maintain reference instead of
get again]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/clk/ti/clk.c

@@ -140,11 +140,12 @@ static struct device_node *ti_find_clock_provider(struct device_node *from,
 			break;
 		}
 	}
-	of_node_put(from);
 	kfree(tmp);
 
-	if (found)
+	if (found) {
+		of_node_put(from);
 		return np;
+	}
 
 	/* Fall back to using old node name base provider name */
 	return of_find_node_by_name(from, name);