serial: liteuart: Don't mix devm_*() with non-devm_*() calls

In the probe we need to call all devm_*() first followed by
non-devm_*() calls. This is due to reversed clean up that
may happen in a wrong order otherwise. The driver currently
allocates xarray before calling
devm_platform_get_and_ioremap_resource(). While it's not an
issue in this certain case, it's still better to be pedantic.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gabriel Somlo <somlo@cmu.edu>
Link: https://lore.kernel.org/r/20230123191741.79751-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index 192ad68..5628923 100644 (file)
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -286,37 +286,35 @@ static int liteuart_probe(struct platform_device *pdev)
        struct xa_limit limit;
        int dev_id, ret;
 
-       /* look for aliases; auto-enumerate for free index if not found */
-       dev_id = of_alias_get_id(pdev->dev.of_node, "serial");
-       if (dev_id < 0)
-               limit = XA_LIMIT(0, CONFIG_SERIAL_LITEUART_MAX_PORTS);
-       else
-               limit = XA_LIMIT(dev_id, dev_id);
-
        uart = devm_kzalloc(&pdev->dev, sizeof(struct liteuart_port), GFP_KERNEL);
        if (!uart)
                return -ENOMEM;
 
-       ret = xa_alloc(&liteuart_array, &dev_id, uart, limit, GFP_KERNEL);
-       if (ret)
-               return ret;
-
-       uart->id = dev_id;
        port = &uart->port;
 
        /* get membase */
        port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
-       if (IS_ERR(port->membase)) {
-               ret = PTR_ERR(port->membase);
-               goto err_erase_id;
-       }
+       if (IS_ERR(port->membase))
+               return PTR_ERR(port->membase);
 
        ret = platform_get_irq_optional(pdev, 0);
        if (ret < 0 && ret != -ENXIO)
-               goto err_erase_id;
+               return ret;
        if (ret > 0)
                port->irq = ret;
 
+       /* look for aliases; auto-enumerate for free index if not found */
+       dev_id = of_alias_get_id(pdev->dev.of_node, "serial");
+       if (dev_id < 0)
+               limit = XA_LIMIT(0, CONFIG_SERIAL_LITEUART_MAX_PORTS);
+       else
+               limit = XA_LIMIT(dev_id, dev_id);
+
+       ret = xa_alloc(&liteuart_array, &dev_id, uart, limit, GFP_KERNEL);
+       if (ret)
+               return ret;
+
+       uart->id = dev_id;
        /* values not from device tree */
        port->dev = &pdev->dev;
        port->iotype = UPIO_MEM;