usb: xhci: tegra: mark PM functions as __maybe_unused

The added #ifdefs in the PM rework were almost correct, but still
cause warnings in some randconfig builds:

drivers/usb/host/xhci-tegra.c:2147:12: error: 'tegra_xusb_resume' defined but not used [-Werror=unused-function]
 2147 | static int tegra_xusb_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~
drivers/usb/host/xhci-tegra.c:2105:12: error: 'tegra_xusb_suspend' defined but not used [-Werror=unused-function]
 2105 | static int tegra_xusb_suspend(struct device *dev)

Replace the #ifdef checks with simpler __maybe_unused annotations to
reliably shut up these warnings.

Link: https://lore.kernel.org/all/20210421135613.3560777-2-arnd@kernel.org/
Fixes: 971ee247060d ("usb: xhci: tegra: Enable ELPG for runtime/system PM")
Reviewed-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211005112057.2700888-1-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 575fa89a783f951a5b1e2b4a904348735b983c3f..1bf494b649bd24c834c26acaf984704e91203974 100644 (file)
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -1787,7 +1787,6 @@ static int tegra_xusb_remove(struct platform_device *pdev)
        return 0;
 }
 
-#if IS_ENABLED(CONFIG_PM) || IS_ENABLED(CONFIG_PM_SLEEP)
 static bool xhci_hub_ports_suspended(struct xhci_hub *hub)
 {
        struct device *dev = hub->hcd->self.controller;
@@ -2102,7 +2101,7 @@ out:
        return err;
 }
 
-static int tegra_xusb_suspend(struct device *dev)
+static __maybe_unused int tegra_xusb_suspend(struct device *dev)
 {
        struct tegra_xusb *tegra = dev_get_drvdata(dev);
        int err;
@@ -2144,7 +2143,7 @@ out:
        return err;
 }
 
-static int tegra_xusb_resume(struct device *dev)
+static __maybe_unused int tegra_xusb_resume(struct device *dev)
 {
        struct tegra_xusb *tegra = dev_get_drvdata(dev);
        int err;
@@ -2174,10 +2173,8 @@ static int tegra_xusb_resume(struct device *dev)
 
        return 0;
 }
-#endif
 
-#ifdef CONFIG_PM
-static int tegra_xusb_runtime_suspend(struct device *dev)
+static __maybe_unused int tegra_xusb_runtime_suspend(struct device *dev)
 {
        struct tegra_xusb *tegra = dev_get_drvdata(dev);
        int ret;
@@ -2190,7 +2187,7 @@ static int tegra_xusb_runtime_suspend(struct device *dev)
        return ret;
 }
 
-static int tegra_xusb_runtime_resume(struct device *dev)
+static __maybe_unused int tegra_xusb_runtime_resume(struct device *dev)
 {
        struct tegra_xusb *tegra = dev_get_drvdata(dev);
        int err;
@@ -2201,7 +2198,6 @@ static int tegra_xusb_runtime_resume(struct device *dev)
 
        return err;
 }
-#endif
 
 static const struct dev_pm_ops tegra_xusb_pm_ops = {
        SET_RUNTIME_PM_OPS(tegra_xusb_runtime_suspend,