serial: mxs-auart: add missed iounmap() in probe failure and remove

This driver calls ioremap() in probe, but it misses calling iounmap() in
probe's error handler and remove.
Add the missed calls to fix it.

Fixes: 47d37d6f94cc ("serial: Add auart driver for i.MX23/28")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200709135608.68290-1-hslester96@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index b4f835e..b784323 100644 (file)
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -1698,21 +1698,21 @@ static int mxs_auart_probe(struct platform_device *pdev)
        irq = platform_get_irq(pdev, 0);
        if (irq < 0) {
                ret = irq;
-               goto out_disable_clks;
+               goto out_iounmap;
        }
 
        s->port.irq = irq;
        ret = devm_request_irq(&pdev->dev, irq, mxs_auart_irq_handle, 0,
                               dev_name(&pdev->dev), s);
        if (ret)
-               goto out_disable_clks;
+               goto out_iounmap;
 
        platform_set_drvdata(pdev, s);
 
        ret = mxs_auart_init_gpios(s, &pdev->dev);
        if (ret) {
                dev_err(&pdev->dev, "Failed to initialize GPIOs.\n");
-               goto out_disable_clks;
+               goto out_iounmap;
        }
 
        /*
@@ -1720,7 +1720,7 @@ static int mxs_auart_probe(struct platform_device *pdev)
         */
        ret = mxs_auart_request_gpio_irq(s);
        if (ret)
-               goto out_disable_clks;
+               goto out_iounmap;
 
        auart_port[s->port.line] = s;
 
@@ -1746,6 +1746,9 @@ out_free_qpio_irq:
        mxs_auart_free_gpio_irq(s);
        auart_port[pdev->id] = NULL;
 
+out_iounmap:
+       iounmap(s->port.membase);
+
 out_disable_clks:
        if (is_asm9260_auart(s)) {
                clk_disable_unprepare(s->clk);
@@ -1761,6 +1764,7 @@ static int mxs_auart_remove(struct platform_device *pdev)
        uart_remove_one_port(&auart_driver, &s->port);
        auart_port[pdev->id] = NULL;
        mxs_auart_free_gpio_irq(s);
+       iounmap(s->port.membase);
        if (is_asm9260_auart(s)) {
                clk_disable_unprepare(s->clk);
                clk_disable_unprepare(s->clk_ahb);