linux-kernel - [PATCH v2 6/6] usb: dwc3: exynos: Switch from CONFIG_PM_SLEEP guards to pm_sleep

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Date: Thu,  4 Apr 2024 12:43:22 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
	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>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Johan Hovold <johan@...nel.org>,
	linux-usb@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 6/6] usb: dwc3: exynos: Switch from CONFIG_PM_SLEEP guards to pm_sleep_ptr()

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

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v2: add __maybe_unused to suspend/resume functions in case CONFIG_PM is
   disabled.
---
 drivers/usb/dwc3/dwc3-exynos.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index 2d341f0e22a3..90259ad1d0d9 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -161,8 +161,7 @@ static const struct of_device_id exynos_dwc3_match[] = {
 };
 MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
 
-#ifdef CONFIG_PM_SLEEP
-static int dwc3_exynos_suspend(struct device *dev)
+static int __maybe_unused dwc3_exynos_suspend(struct device *dev)
 {
 	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
 	int i;
@@ -173,7 +172,7 @@ static int dwc3_exynos_suspend(struct device *dev)
 	return 0;
 }
 
-static int dwc3_exynos_resume(struct device *dev)
+static int __maybe_unused dwc3_exynos_resume(struct device *dev)
 {
 	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
 	int i, ret;
@@ -194,18 +193,13 @@ static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume)
 };
 
-#define DEV_PM_OPS	(&dwc3_exynos_dev_pm_ops)
-#else
-#define DEV_PM_OPS	NULL
-#endif /* CONFIG_PM_SLEEP */
-
 static struct platform_driver dwc3_exynos_driver = {
 	.probe		= dwc3_exynos_probe,
 	.remove_new	= dwc3_exynos_remove,
 	.driver		= {
 		.name	= "exynos-dwc3",
 		.of_match_table = exynos_dwc3_match,
-		.pm	= DEV_PM_OPS,
+		.pm	= pm_sleep_ptr(&dwc3_exynos_dev_pm_ops),
 	},
 };
 
-- 
2.44.0