tty: serial: 8250-of: Do not warn on deferred probe

Deferred probe is an expected return value for clk_get() on many
platforms. The driver deals with it properly, so there's no need
to output a warning that may potentially confuse users.

Signed-off-by: Thierry Reding <treding@nvidia.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 1308b3d..0826cfd 100644 (file)
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -70,9 +70,10 @@ 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)) {
-                       dev_warn(&ofdev->dev,
-                               "clk or clock-frequency not defined\n");
                        ret = PTR_ERR(info->clk);
+                       if (ret != -EPROBE_DEFER)
+                               dev_warn(&ofdev->dev,
+                                        "failed to get clock: %d\n", ret);
                        goto err_pmruntime;
                }