[PATCH net-next v2 10/10] net: xilinx: axienet: Convert using devm_clk_get_optional_enabled() in axienet_probe()

[Li Zetao]

Use devm_clk_get_optional_enabled() instead of devm_clk_get_optional() +
clk_prepare_enable(), which can make the clk consistent with the device
life cycle and reduce the risk of unreleased clk resources. Since the
device framework has automatically released the clk resource, there is
no need to execute clk_disable_unprepare(clk) on the error path.

Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey at amd.com>
Signed-off-by: Li Zetao <lizetao1 at huawei.com>
---
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 374dff70ef0d..87c5dcec2325 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -2592,22 +2592,17 @@ static int axienet_probe(struct platform_device *pdev)
 	seqcount_mutex_init(&lp->hw_stats_seqcount, &lp->stats_lock);
 	INIT_DEFERRABLE_WORK(&lp->stats_work, axienet_refresh_stats);
 
-	lp->axi_clk = devm_clk_get_optional(&pdev->dev, "s_axi_lite_clk");
-	if (!lp->axi_clk) {
+	lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, "s_axi_lite_clk");
+	if (!lp->axi_clk)
 		/* For backward compatibility, if named AXI clock is not present,
 		 * treat the first clock specified as the AXI clock.
 		 */
-		lp->axi_clk = devm_clk_get_optional(&pdev->dev, NULL);
-	}
+		lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);
+
 	if (IS_ERR(lp->axi_clk)) {
 		ret = PTR_ERR(lp->axi_clk);
 		goto free_netdev;
 	}
-	ret = clk_prepare_enable(lp->axi_clk);
-	if (ret) {
-		dev_err(&pdev->dev, "Unable to enable AXI clock: %d\n", ret);
-		goto free_netdev;
-	}
 
 	lp->misc_clks[0].id = "axis_clk";
 	lp->misc_clks[1].id = "ref_clk";
@@ -2923,7 +2918,6 @@ static int axienet_probe(struct platform_device *pdev)
 		axienet_mdio_teardown(lp);
 cleanup_clk:
 	clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp->misc_clks);
-	clk_disable_unprepare(lp->axi_clk);
 
 free_netdev:
 	free_netdev(ndev);
@@ -2947,7 +2941,6 @@ static void axienet_remove(struct platform_device *pdev)
 	axienet_mdio_teardown(lp);
 
 	clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp->misc_clks);
-	clk_disable_unprepare(lp->axi_clk);
 
 	free_netdev(ndev);
 }
-- 
2.34.1