linux-kernel - [PATCH v1 2/4] usb: ehci-exynos: Switch from CONFIG_PM guards to pm

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Date: Sat,  2 Mar 2024 01:08:09 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Alim Akhtar <alim.akhtar@...sung.com>
Cc: Anand Moon <linux.amoon@...il.com>,
	linux-usb@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/4] usb: ehci-exynos: Switch from CONFIG_PM guards to pm_ptr()

Use the new PM macros for the suspend and resume functions to be
automatically dropped by the compiler when CONFIG_PM are disabled,
without having to use #ifdef guards. If CONFIG_PM unused,
they will simply be discarded by the compiler.

Use RUNTIME_PM_OPS runtime macro for suspend/resume function.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
 drivers/usb/host/ehci-exynos.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 05aa3d9c2a3b..4676f45655cd 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -234,7 +234,6 @@ static void exynos_ehci_remove(struct platform_device *pdev)
 	usb_put_hcd(hcd);
 }
 
-#ifdef CONFIG_PM
 static int exynos_ehci_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
@@ -268,14 +267,9 @@ static int exynos_ehci_resume(struct device *dev)
 	ehci_resume(hcd, false);
 	return 0;
 }
-#else
-#define exynos_ehci_suspend	NULL
-#define exynos_ehci_resume	NULL
-#endif
 
 static const struct dev_pm_ops exynos_ehci_pm_ops = {
-	.suspend	= exynos_ehci_suspend,
-	.resume		= exynos_ehci_resume,
+	RUNTIME_PM_OPS(exynos_ehci_suspend, exynos_ehci_resume, NULL)
 };
 
 #ifdef CONFIG_OF
@@ -292,7 +286,7 @@ static struct platform_driver exynos_ehci_driver = {
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver = {
 		.name	= "exynos-ehci",
-		.pm	= &exynos_ehci_pm_ops,
+		.pm	= pm_ptr(&exynos_ehci_pm_ops),
 		.of_match_table = of_match_ptr(exynos_ehci_match),
 	}
 };
-- 
2.43.0