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authorArnd Bergmann <arnd@arndb.de>2016-03-02 16:24:04 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-03-03 20:37:41 -0800
commit8dac5300c251263cc91f49713d64b5ca85a76d53 (patch)
treeae06a1c688f77d73d3a009ebe37ede651ef0bf1e /drivers/usb
parentc88d4df217f9a32415d63c1259a45da7f50ac38e (diff)
downloadblackbird-op-linux-8dac5300c251263cc91f49713d64b5ca85a76d53.tar.gz
blackbird-op-linux-8dac5300c251263cc91f49713d64b5ca85a76d53.zip
usb: xhci-mtk: use __maybe_unused to hide pm functions
The mediatek XHCI glue driver uses SET_SYSTEM_SLEEP_PM_OPS() to conditionally set the correct suspend/resume options, and also puts both the dev_pm_ops and the functions inside of an #ifdef testing for CONFIG_PM_SLEEP, but those functions then call other code that becomes unused: drivers/usb/host/xhci-mtk.c:135:12: error: 'xhci_mtk_host_disable' defined but not used [-Werror=unused-function] drivers/usb/host/xhci-mtk.c:313:13: error: 'usb_wakeup_enable' defined but not used [-Werror=unused-function] drivers/usb/host/xhci-mtk.c:321:13: error: 'usb_wakeup_disable' defined but not used [-Werror=unused-function] This replaces the #ifdef with __maybe_unused annotations so the compiler knows it can silently drop them instead of warning. For the DEV_PM_OPS definition, we can use an IS_ENABLED() check to avoid defining the structure when CONFIG_PM is not set without the #ifdef. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/xhci-mtk.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 9532f5aef71b..79959f17c38c 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -695,7 +695,6 @@ static int xhci_mtk_remove(struct platform_device *dev)
return 0;
}
-#ifdef CONFIG_PM_SLEEP
/*
* if ip sleep fails, and all clocks are disabled, access register will hang
* AHB bus, so stop polling roothubs to avoid regs access on bus suspend.
@@ -703,7 +702,7 @@ static int xhci_mtk_remove(struct platform_device *dev)
* to wake up system immediately after system suspend complete if ip sleep
* fails, it is what we wanted.
*/
-static int xhci_mtk_suspend(struct device *dev)
+static int __maybe_unused xhci_mtk_suspend(struct device *dev)
{
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
@@ -722,7 +721,7 @@ static int xhci_mtk_suspend(struct device *dev)
return 0;
}
-static int xhci_mtk_resume(struct device *dev)
+static int __maybe_unused xhci_mtk_resume(struct device *dev)
{
struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
struct usb_hcd *hcd = mtk->hcd;
@@ -744,10 +743,7 @@ static int xhci_mtk_resume(struct device *dev)
static const struct dev_pm_ops xhci_mtk_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
};
-#define DEV_PM_OPS (&xhci_mtk_pm_ops)
-#else
-#define DEV_PM_OPS NULL
-#endif /* CONFIG_PM */
+#define DEV_PM_OPS IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL
#ifdef CONFIG_OF
static const struct of_device_id mtk_xhci_of_match[] = {
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