[PATCH 4.15 46/55] serial: 8250_uniphier: fix error return code in uniphier_uart_probe()

[Greg Kroah-Hartman]

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Yongjun <weiyongj...@huawei.com>

commit 7defa77d2baca4d6eb85234f10f38ab618332e75 upstream.

Fix to return a negative error code from the port register error
handling case instead of 0, as done elsewhere in this function.

Fixes: 39be40ce066d ("serial: 8250_uniphier: fix serial port index in private 
data")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
Acked-by: Masahiro Yamada <yamada.masah...@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/tty/serial/8250/8250_uniphier.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/tty/serial/8250/8250_uniphier.c
+++ b/drivers/tty/serial/8250/8250_uniphier.c
@@ -250,12 +250,13 @@ static int uniphier_uart_probe(struct pl
        up.dl_read = uniphier_serial_dl_read;
        up.dl_write = uniphier_serial_dl_write;
 
-       priv->line = serial8250_register_8250_port(&up);
-       if (priv->line < 0) {
+       ret = serial8250_register_8250_port(&up);
+       if (ret < 0) {
                dev_err(dev, "failed to register 8250 port\n");
                clk_disable_unprepare(priv->clk);
                return ret;
        }
+       priv->line = ret;
 
        platform_set_drvdata(pdev, priv);