serial: 8250_bcm7271: fix leak in `brcmuart_probe`

[ Upstream commit f264f2f6f4788dc031cef60a0cf2881902736709 ]

Smatch reports:
drivers/tty/serial/8250/8250_bcm7271.c:1120 brcmuart_probe() warn:
'baud_mux_clk' from clk_prepare_enable() not released on lines: 1032.

The issue is fixed by using a managed clock.

Fixes: 41a469482de2 ("serial: 8250: Add new 8250-core based Broadcom STB driver")
Reported-by: XuDong Liu <m202071377@hust.edu.cn>
Link: https://lore.kernel.org/lkml/20230424125100.4783-1-m202071377@hust.edu.cn/
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230427181916.2983697-3-opendmb@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c
index 513ed24cba5ce6b3327a2a0a215fe3f819e68055..f95047160b4d2cf22dd92c4b42f86939e1c8b5fa 100644 (file)
--- a/drivers/tty/serial/8250/8250_bcm7271.c
+++ b/drivers/tty/serial/8250/8250_bcm7271.c
@@ -1016,7 +1016,7 @@ static int brcmuart_probe(struct platform_device *pdev)
        of_property_read_u32(np, "clock-frequency", &clk_rate);
 
        /* See if a Baud clock has been specified */
-       baud_mux_clk = of_clk_get_by_name(np, "sw_baud");
+       baud_mux_clk = devm_clk_get(dev, "sw_baud");
        if (IS_ERR(baud_mux_clk)) {
                if (PTR_ERR(baud_mux_clk) == -EPROBE_DEFER) {
                        ret = -EPROBE_DEFER;