netdev - [PATCH net-next 03/23] can: rcar_canfd: Use dev_err_probe() to simplify code and better handle -EPROBE

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Message-Id: <20220915082013.369072-4-mkl@pengutronix.de>
Date:   Thu, 15 Sep 2022 10:19:53 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
        kernel@...gutronix.de,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 03/23] can: rcar_canfd: Use dev_err_probe() to simplify code and better handle -EPROBE_DEFER

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

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@...adoo.fr>
Link: https://lore.kernel.org/all/f5bf0b8f757bd3bc9b391094ece3548cc2f96456.1659858686.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/rcar/rcar_canfd.c | 26 ++++++++++----------------
 1 file changed, 10 insertions(+), 16 deletions(-)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 27085b796e75..567620d215f8 100644
--- 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 {
-- 
2.35.1