serial: 8250_of: Use dev_err_probe() instead of dev_warn()

The probe process may generate EPROBE_DEFER. In this case
dev_err_probe() can still record err information. Otherwise
it may pollute logs on that occasion.

This also helps simplifing code and standardizing the error output.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230912165607.402580-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
index 5132962..8c61ed2 100644 (file)
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -33,7 +33,8 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
                        struct of_serial_info *info)
 {
        struct resource resource;
-       struct device_node *np = ofdev->dev.of_node;
+       struct device *dev = &ofdev->dev;
+       struct device_node *np = dev->of_node;
        struct uart_port *port = &up->port;
        u32 clk, spd, prop;
        int ret, irq;
@@ -48,10 +49,7 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
                /* Get clk rate through clk driver if present */
                info->clk = devm_clk_get(&ofdev->dev, NULL);
                if (IS_ERR(info->clk)) {
-                       ret = PTR_ERR(info->clk);
-                       if (ret != -EPROBE_DEFER)
-                               dev_warn(&ofdev->dev,
-                                        "failed to get clock: %d\n", ret);
+                       ret = dev_err_probe(dev, PTR_ERR(info->clk), "failed to get clock\n");
                        goto err_pmruntime;
                }
 
@@ -67,7 +65,7 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
 
        ret = of_address_to_resource(np, 0, &resource);
        if (ret) {
-               dev_warn(&ofdev->dev, "invalid address\n");
+               dev_err_probe(dev, ret, "invalid address\n");
                goto err_unprepare;
        }
 
@@ -85,9 +83,8 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
                /* Check for shifted address mapping */
                if (of_property_read_u32(np, "reg-offset", &prop) == 0) {
                        if (prop >= port->mapsize) {
-                               dev_warn(&ofdev->dev, "reg-offset %u exceeds region size %pa\n",
-                                        prop, &port->mapsize);
-                               ret = -EINVAL;
+                               ret = dev_err_probe(dev, -EINVAL, "reg-offset %u exceeds region size %pa\n",
+                                                   prop, &port->mapsize);
                                goto err_unprepare;
                        }
 
@@ -109,9 +106,8 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
                                               UPIO_MEM32BE : UPIO_MEM32;
                                break;
                        default:
-                               dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",
-                                        prop);
-                               ret = -EINVAL;
+                               ret = dev_err_probe(dev, -EINVAL, "unsupported reg-io-width (%u)\n",
+                                                   prop);
                                goto err_unprepare;
                        }
                }