This clock should be optional. In addition, PTR_ERR can be -EPROBE_DEFER
in which case it should return.

devm_clk_get_optional_enabled also allows removing explicit clock enable
and disable calls.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/net/ethernet/marvell/mv643xx_eth.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index 36646787885d..73094b3b590c 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -2854,9 +2854,9 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 	if (IS_ERR(msp->base))
 		return PTR_ERR(msp->base);
 
-	msp->clk = devm_clk_get(&pdev->dev, NULL);
-	if (!IS_ERR(msp->clk))
-		clk_prepare_enable(msp->clk);
+	msp->clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);
+	if (IS_ERR(msp->clk))
+		return PTR_ERR(msp->clk);
 
 	/*
 	 * (Re-)program MBUS remapping windows if we are asked to.
@@ -2867,7 +2867,7 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 
 	ret = mv643xx_eth_shared_of_probe(pdev);
 	if (ret)
-		goto err_put_clk;
+		return ret;
 	pd = dev_get_platdata(&pdev->dev);
 
 	msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
@@ -2875,20 +2875,11 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 	infer_hw_params(msp);
 
 	return 0;
-
-err_put_clk:
-	if (!IS_ERR(msp->clk))
-		clk_disable_unprepare(msp->clk);
-	return ret;
 }
 
 static void mv643xx_eth_shared_remove(struct platform_device *pdev)
 {
-	struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
-
 	mv643xx_eth_shared_of_remove();
-	if (!IS_ERR(msp->clk))
-		clk_disable_unprepare(msp->clk);
 }
 
 static struct platform_driver mv643xx_eth_shared_driver = {
-- 
2.46.2

On Mon, Sep 30, 2024 at 01:29:51PM -0700, Rosen Penev wrote:
> This clock should be optional. In addition, PTR_ERR can be -EPROBE_DEFER
> in which case it should return.
> 
> devm_clk_get_optional_enabled also allows removing explicit clock enable
> and disable calls.

mv643xx_eth was one of the early drivers to get converted to common
clock framework, and then devm. Some of the niceties of _optional, and
_enable did not exist back then. So the logic may seem a bit odd
nowadays.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew