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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/usb/serial.h
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@@ -17,17 +17,14 @@
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 #include <linux/kref.h>
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 #include <linux/mutex.h>
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 #include <linux/serial.h>
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-#include <linux/sysrq.h>
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 #include <linux/kfifo.h>
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21
 
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 /* The maximum number of ports one device can grab at once */
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 #define MAX_NUM_PORTS		16
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-/* parity check flag */
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-#define RELEVANT_IFLAG(iflag)	(iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
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-
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 /* USB serial flags */
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 #define USB_SERIAL_WRITE_BUSY	0
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+#define USB_SERIAL_THROTTLED	1
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 /**
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  * usb_serial_port: structure for the specific ports of a device.
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@@ -67,8 +64,6 @@
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  * @flags: usb serial port flags
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  * @write_wait: a wait_queue_head_t used by the port.
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  * @work: work queue entry for the line discipline waking up.
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- * @throttled: nonzero if the read urb is inactive to throttle the device
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- * @throttle_req: nonzero if the tty wants to throttle us
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  * @dev: pointer to the serial device
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  *
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  * This structure is used by the usb-serial core and drivers for the specific
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@@ -115,8 +110,6 @@
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 	unsigned long		flags;
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 	wait_queue_head_t	write_wait;
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 	struct work_struct	work;
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-	char			throttled;
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-	char			throttle_req;
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 	unsigned long		sysrq; /* sysrq timeout */
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 	struct device		dev;
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 };
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@@ -219,7 +212,7 @@
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  *	Return 0 to continue on with the initialization sequence.  Anything
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  *	else will abort it.
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  * @attach: pointer to the driver's attach function.
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- *	This will be called when the struct usb_serial structure is fully set
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+ *	This will be called when the struct usb_serial structure is fully
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  *	set up.  Do any local initialization of the device, or any private
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  *	memory structure allocation at this point in time.
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  * @disconnect: pointer to the driver's disconnect function.  This will be
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@@ -285,6 +278,8 @@
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 	int  (*write_room)(struct tty_struct *tty);
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 	int  (*ioctl)(struct tty_struct *tty,
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 		      unsigned int cmd, unsigned long arg);
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+	int  (*get_serial)(struct tty_struct *tty, struct serial_struct *ss);
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+	int  (*set_serial)(struct tty_struct *tty, struct serial_struct *ss);
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 	void (*set_termios)(struct tty_struct *tty,
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 			struct usb_serial_port *port, struct ktermios *old);
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 	void (*break_ctl)(struct tty_struct *tty, int break_state);
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@@ -320,19 +315,19 @@
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 #define to_usb_serial_driver(d) \
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 	container_of(d, struct usb_serial_driver, driver)
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317
 
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-extern int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[],
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+int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[],
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 		const char *name, const struct usb_device_id *id_table);
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-extern void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[]);
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-extern void usb_serial_port_softint(struct usb_serial_port *port);
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+void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[]);
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+void usb_serial_port_softint(struct usb_serial_port *port);
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-extern int usb_serial_suspend(struct usb_interface *intf, pm_message_t message);
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-extern int usb_serial_resume(struct usb_interface *intf);
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+int usb_serial_suspend(struct usb_interface *intf, pm_message_t message);
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+int usb_serial_resume(struct usb_interface *intf);
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 /* USB Serial console functions */
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 #ifdef CONFIG_USB_SERIAL_CONSOLE
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-extern void usb_serial_console_init(int minor);
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-extern void usb_serial_console_exit(void);
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-extern void usb_serial_console_disconnect(struct usb_serial *serial);
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+void usb_serial_console_init(int minor);
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+void usb_serial_console_exit(void);
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+void usb_serial_console_disconnect(struct usb_serial *serial);
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 #else
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 static inline void usb_serial_console_init(int minor) { }
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 static inline void usb_serial_console_exit(void) { }
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@@ -340,45 +335,49 @@
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 #endif
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 /* Functions needed by other parts of the usbserial core */
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-extern struct usb_serial_port *usb_serial_port_get_by_minor(unsigned int minor);
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-extern void usb_serial_put(struct usb_serial *serial);
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-extern int usb_serial_generic_open(struct tty_struct *tty,
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-	struct usb_serial_port *port);
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-extern int usb_serial_generic_write_start(struct usb_serial_port *port,
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-							gfp_t mem_flags);
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-extern int usb_serial_generic_write(struct tty_struct *tty,
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-	struct usb_serial_port *port, const unsigned char *buf, int count);
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-extern void usb_serial_generic_close(struct usb_serial_port *port);
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-extern int usb_serial_generic_resume(struct usb_serial *serial);
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-extern int usb_serial_generic_write_room(struct tty_struct *tty);
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-extern int usb_serial_generic_chars_in_buffer(struct tty_struct *tty);
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-extern void usb_serial_generic_wait_until_sent(struct tty_struct *tty,
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-								long timeout);
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-extern void usb_serial_generic_read_bulk_callback(struct urb *urb);
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-extern void usb_serial_generic_write_bulk_callback(struct urb *urb);
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-extern void usb_serial_generic_throttle(struct tty_struct *tty);
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-extern void usb_serial_generic_unthrottle(struct tty_struct *tty);
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-extern int usb_serial_generic_tiocmiwait(struct tty_struct *tty,
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-							unsigned long arg);
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-extern int usb_serial_generic_get_icount(struct tty_struct *tty,
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-					struct serial_icounter_struct *icount);
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-extern int usb_serial_generic_register(void);
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-extern void usb_serial_generic_deregister(void);
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-extern int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port,
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-						 gfp_t mem_flags);
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-extern void usb_serial_generic_process_read_urb(struct urb *urb);
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-extern int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,
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-						void *dest, size_t size);
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-extern int usb_serial_handle_sysrq_char(struct usb_serial_port *port,
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-					unsigned int ch);
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-extern int usb_serial_handle_break(struct usb_serial_port *port);
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-extern void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port,
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-					 struct tty_struct *tty,
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-					 unsigned int status);
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+struct usb_serial_port *usb_serial_port_get_by_minor(unsigned int minor);
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+void usb_serial_put(struct usb_serial *serial);
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+int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port);
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+int usb_serial_generic_write_start(struct usb_serial_port *port, gfp_t mem_flags);
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+int usb_serial_generic_write(struct tty_struct *tty, struct usb_serial_port *port,
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+		const unsigned char *buf, int count);
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+void usb_serial_generic_close(struct usb_serial_port *port);
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+int usb_serial_generic_resume(struct usb_serial *serial);
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+int usb_serial_generic_write_room(struct tty_struct *tty);
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+int usb_serial_generic_chars_in_buffer(struct tty_struct *tty);
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+void usb_serial_generic_wait_until_sent(struct tty_struct *tty, long timeout);
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+void usb_serial_generic_read_bulk_callback(struct urb *urb);
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+void usb_serial_generic_write_bulk_callback(struct urb *urb);
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+void usb_serial_generic_throttle(struct tty_struct *tty);
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+void usb_serial_generic_unthrottle(struct tty_struct *tty);
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+int usb_serial_generic_tiocmiwait(struct tty_struct *tty, unsigned long arg);
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+int usb_serial_generic_get_icount(struct tty_struct *tty, struct serial_icounter_struct *icount);
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+int usb_serial_generic_register(void);
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+void usb_serial_generic_deregister(void);
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+int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port, gfp_t mem_flags);
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+void usb_serial_generic_process_read_urb(struct urb *urb);
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+int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port, void *dest, size_t size);
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+
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+#if defined(CONFIG_USB_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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+int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch);
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+int usb_serial_handle_break(struct usb_serial_port *port);
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+#else
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+static inline int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)
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+{
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+	return 0;
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+}
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+static inline int usb_serial_handle_break(struct usb_serial_port *port)
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+{
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+	return 0;
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+}
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+#endif
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+
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+void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port,
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+		struct tty_struct *tty, unsigned int status);
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-extern int usb_serial_bus_register(struct usb_serial_driver *device);
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-extern void usb_serial_bus_deregister(struct usb_serial_driver *device);
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+int usb_serial_bus_register(struct usb_serial_driver *device);
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+void usb_serial_bus_deregister(struct usb_serial_driver *device);
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 extern struct bus_type usb_serial_bus_type;
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 extern struct tty_driver *usb_serial_tty_driver;