diff mbox series

[net-next,2/2] net: mv643xx: fix wrong devm_clk_get usage

Message ID 20240930202951.297737-3-rosenp@gmail.com (mailing list archive)
State Accepted
Commit 50c3a7fbaa10a1973cfcf910601a5120b2595022
Delegated to: Netdev Maintainers
Headers show
Series net: mv643xx: devm fixes | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 9 this patch: 9
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: sebastian.hesselbarth@gmail.com
netdev/build_clang success Errors and warnings before: 9 this patch: 9
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn fail Errors and warnings before: 12 this patch: 12
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 40 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Rosen Penev Sept. 30, 2024, 8:29 p.m. UTC 
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(-)

Comments

Andrew Lunn Sept. 30, 2024, 8:43 p.m. UTC | #1 
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
diff mbox series

Patch

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 = {