forked from luck/tmp_suning_uos_patched
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>
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@ -695,7 +695,6 @@ static int xhci_mtk_remove(struct platform_device *dev)
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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/*
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* if ip sleep fails, and all clocks are disabled, access register will hang
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* AHB bus, so stop polling roothubs to avoid regs access on bus suspend.
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@ -703,7 +702,7 @@ static int xhci_mtk_remove(struct platform_device *dev)
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* to wake up system immediately after system suspend complete if ip sleep
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* fails, it is what we wanted.
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*/
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static int xhci_mtk_suspend(struct device *dev)
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static int __maybe_unused xhci_mtk_suspend(struct device *dev)
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{
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struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
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struct usb_hcd *hcd = mtk->hcd;
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@ -722,7 +721,7 @@ static int xhci_mtk_suspend(struct device *dev)
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return 0;
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}
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static int xhci_mtk_resume(struct device *dev)
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static int __maybe_unused xhci_mtk_resume(struct device *dev)
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{
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struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
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struct usb_hcd *hcd = mtk->hcd;
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@ -744,10 +743,7 @@ static int xhci_mtk_resume(struct device *dev)
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static const struct dev_pm_ops xhci_mtk_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
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};
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#define DEV_PM_OPS (&xhci_mtk_pm_ops)
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#else
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#define DEV_PM_OPS NULL
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#endif /* CONFIG_PM */
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#define DEV_PM_OPS IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL
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#ifdef CONFIG_OF
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static const struct of_device_id mtk_xhci_of_match[] = {
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