usb: roles: Introduce stubs for the exiting functions in role.h (97760765) · Commits · 戴 / test

This patch adds stubs for the exiting functions while CONFIG_USB_ROLE_SWITCH does not enabled. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: John Stultz <john.stultz@linaro.org> Reviewed-by:

Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by:

Yu Chen <chenyu56@huawei.com> Signed-off-by:

Chunfeng Yun <chunfeng.yun@mediatek.com> Link: https://lore.kernel.org/r/1567070558-29417-6-git-send-email-chunfeng.yun@mediatek.com Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/usb/role.h

+30 −0

Original line number	Diff line number	Diff line
		@@ -42,6 +42,8 @@ struct usb_role_switch_desc {
		bool allow_userspace_control;
		};


		#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
		int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role);
		enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw);
		struct usb_role_switch usb_role_switch_get(struct device dev);
		@@ -51,5 +53,33 @@ struct usb_role_switch *
		usb_role_switch_register(struct device *parent,
		const struct usb_role_switch_desc *desc);
		void usb_role_switch_unregister(struct usb_role_switch *sw);
		#else
		static inline int usb_role_switch_set_role(struct usb_role_switch *sw,
		enum usb_role role)
		{
		return 0;
		}

		static inline enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)
		{
		return USB_ROLE_NONE;
		}

		static inline struct usb_role_switch usb_role_switch_get(struct device dev)
		{
		return ERR_PTR(-ENODEV);
		}

		static inline void usb_role_switch_put(struct usb_role_switch *sw) { }

		static inline struct usb_role_switch *
		usb_role_switch_register(struct device *parent,
		const struct usb_role_switch_desc *desc)
		{
		return ERR_PTR(-ENODEV);
		}

		static inline void usb_role_switch_unregister(struct usb_role_switch *sw) { }
		#endif

		#endif /* __LINUX_USB_ROLE_H */

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