linux-kernel - [PATCH 1/2] host: ehci-exynos: Convert to use the SET_SYSTEM_SLEEP_PM

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Date:   Sun,  9 Oct 2016 14:34:14 +0000
From:   Anand Moon <linux.amoon@...il.com>
To:     Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>
Cc:     linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Anand Moon <linux.amoon@...il.com>
Subject: [PATCH 1/2] host: ehci-exynos: Convert to use the SET_SYSTEM_SLEEP_PM_OPS

Move the ehci-exynos system PM callbacks within #ifdef CONFIG_PM_SLEEP
as to avoid them being build when not used. This also allows us to use the
SET_SYSTEM_SLEEP_PM_OPS macro which simplifies the code.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
 drivers/usb/host/ehci-exynos.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 42e5b66..1899900 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -251,7 +251,7 @@ static int exynos_ehci_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int exynos_ehci_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
@@ -292,15 +292,13 @@ 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,
+	SET_SYSTEM_SLEEP_PM_OPS(exynos_ehci_suspend, exynos_ehci_resume)
 };
+#endif /* CONFIG_PM_SLEEP */
+
+#define DEV_PM_OPS IS_ENABLED(CONFIG_PM_SLEEP) ? &exynos_ehci_pm_ops : NULL
 
 #ifdef CONFIG_OF
 static const struct of_device_id exynos_ehci_match[] = {
@@ -317,7 +315,7 @@ static struct platform_driver exynos_ehci_driver = {
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver = {
 		.name	= "exynos-ehci",
-		.pm	= &exynos_ehci_pm_ops,
+		.pm	= DEV_PM_OPS,
 		.of_match_table = of_match_ptr(exynos_ehci_match),
 	}
 };
-- 
2.7.4