[PATCH 5.10.y 1/2] usb: ohci-nxp: Use helper function devm_clk_get_enabled()

[Sasha Levin <sashal@kernel.org>]

From: Zhang Zekun <zhangzekun11@huawei.com>

[ Upstream commit c146ede472717f352b7283a525bd9a1a2b15e2cf ]

devm_clk_get() and clk_prepare_enable() can be replaced by helper
function devm_clk_get_enabled(). Let's use devm_clk_get_enabled() to
simplify code and avoid calling clk_disable_unprepare().

Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20240902123020.29267-3-zhangzekun11@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: b4c61e542faf ("usb: ohci-nxp: fix device leak on probe failure")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/host/ohci-nxp.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/host/ohci-nxp.c b/drivers/usb/host/ohci-nxp.c
index 106a6bcefb08..f7f85fc9ce8f 100644
--- a/drivers/usb/host/ohci-nxp.c
+++ b/drivers/usb/host/ohci-nxp.c
@@ -51,8 +51,6 @@ static struct hc_driver __read_mostly ohci_nxp_hc_driver;
 
 static struct i2c_client *isp1301_i2c_client;
 
-static struct clk *usb_host_clk;
-
 static void isp1301_configure_lpc32xx(void)
 {
 	/* LPC32XX only supports DAT_SE0 USB mode */
@@ -155,6 +153,7 @@ static int ohci_hcd_nxp_probe(struct platform_device *pdev)
 	struct resource *res;
 	int ret = 0, irq;
 	struct device_node *isp1301_node;
+	struct clk *usb_host_clk;
 
 	if (pdev->dev.of_node) {
 		isp1301_node = of_parse_phandle(pdev->dev.of_node,
@@ -180,26 +179,20 @@ static int ohci_hcd_nxp_probe(struct platform_device *pdev)
 	}
 
 	/* Enable USB host clock */
-	usb_host_clk = devm_clk_get(&pdev->dev, NULL);
+	usb_host_clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(usb_host_clk)) {
-		dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
+		dev_err(&pdev->dev, "failed to acquire and start USB OHCI clock\n");
 		ret = PTR_ERR(usb_host_clk);
 		goto fail_disable;
 	}
 
-	ret = clk_prepare_enable(usb_host_clk);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
-		goto fail_disable;
-	}
-
 	isp1301_configure();
 
 	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
 	if (!hcd) {
 		dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
 		ret = -ENOMEM;
-		goto fail_hcd;
+		goto fail_disable;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -230,8 +223,6 @@ static int ohci_hcd_nxp_probe(struct platform_device *pdev)
 	ohci_nxp_stop_hc();
 fail_resource:
 	usb_put_hcd(hcd);
-fail_hcd:
-	clk_disable_unprepare(usb_host_clk);
 fail_disable:
 	isp1301_i2c_client = NULL;
 	return ret;
@@ -244,7 +235,6 @@ static int ohci_hcd_nxp_remove(struct platform_device *pdev)
 	usb_remove_hcd(hcd);
 	ohci_nxp_stop_hc();
 	usb_put_hcd(hcd);
-	clk_disable_unprepare(usb_host_clk);
 	isp1301_i2c_client = NULL;
 
 	return 0;
-- 
2.51.0