can: rcar_canfd: Use dev_err_probe() to simplify code and better handle -EPROBE_DEFER

devm_clk_get() can return -EPROBE_DEFER, so use dev_err_probe() instead of
dev_err() in order to be less verbose in the log.

This also saves a few LoC.

While at it, turn a "goto fail_dev;" at the beginning of the function into
a direct return in order to avoid mixing goto and return, which looks
spurious.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/all/f5bf0b8f757bd3bc9b391094ece3548cc2f96456.1659858686.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 27085b7..567620d 100644 (file)
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -1880,10 +1880,9 @@ static int rcar_canfd_probe(struct platform_device *pdev)
 
        /* Global controller context */
        gpriv = devm_kzalloc(&pdev->dev, sizeof(*gpriv), GFP_KERNEL);
-       if (!gpriv) {
-               err = -ENOMEM;
-               goto fail_dev;
-       }
+       if (!gpriv)
+               return -ENOMEM;
+
        gpriv->pdev = pdev;
        gpriv->channels_mask = channels_mask;
        gpriv->fdmode = fdmode;
@@ -1904,12 +1903,9 @@ static int rcar_canfd_probe(struct platform_device *pdev)
 
        /* Peripheral clock */
        gpriv->clkp = devm_clk_get(&pdev->dev, "fck");
-       if (IS_ERR(gpriv->clkp)) {
-               err = PTR_ERR(gpriv->clkp);
-               dev_err(&pdev->dev, "cannot get peripheral clock, error %d\n",
-                       err);
-               goto fail_dev;
-       }
+       if (IS_ERR(gpriv->clkp))
+               return dev_err_probe(&pdev->dev, PTR_ERR(gpriv->clkp),
+                                    "cannot get peripheral clock\n");
 
        /* fCAN clock: Pick External clock. If not available fallback to
         * CANFD clock
@@ -1917,12 +1913,10 @@ static int rcar_canfd_probe(struct platform_device *pdev)
        gpriv->can_clk = devm_clk_get(&pdev->dev, "can_clk");
        if (IS_ERR(gpriv->can_clk) || (clk_get_rate(gpriv->can_clk) == 0)) {
                gpriv->can_clk = devm_clk_get(&pdev->dev, "canfd");
-               if (IS_ERR(gpriv->can_clk)) {
-                       err = PTR_ERR(gpriv->can_clk);
-                       dev_err(&pdev->dev,
-                               "cannot get canfd clock, error %d\n", err);
-                       goto fail_dev;
-               }
+               if (IS_ERR(gpriv->can_clk))
+                       return dev_err_probe(&pdev->dev, PTR_ERR(gpriv->can_clk),
+                                            "cannot get canfd clock\n");
+
                gpriv->fcan = RCANFD_CANFDCLK;
 
        } else {