clk: sunxi: Fix return value check in sun8i_a23_mbus_setup()

In case of error, the function of_io_request_and_map() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should be
replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/drivers/clk/sunxi/clk-sun8i-mbus.c b/drivers/clk/sunxi/clk-sun8i-mbus.c
index 411d303..b200ebf 100644 (file)
--- a/drivers/clk/sunxi/clk-sun8i-mbus.c
+++ b/drivers/clk/sunxi/clk-sun8i-mbus.c
@@ -48,7 +48,7 @@ static void __init sun8i_a23_mbus_setup(struct device_node *node)
                return;
 
        reg = of_io_request_and_map(node, 0, of_node_full_name(node));
-       if (!reg) {
+       if (IS_ERR(reg)) {
                pr_err("Could not get registers for sun8i-mbus-clk\n");
                goto err_free_parents;
        }