diff options
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/serial.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h index 33dcd8576696..32acbae28d24 100644 --- a/include/linux/usb/serial.h +++ b/include/linux/usb/serial.h @@ -54,6 +54,8 @@ * @write_wait: a wait_queue_head_t used by the port. * @work: work queue entry for the line discipline waking up. * @open_count: number of times this port has been opened. + * @throttled: nonzero if the read urb is inactive to throttle the device + * @throttle_req: nonzero if the tty wants to throttle us * * This structure is used by the usb-serial core and drivers for the specific * ports of a device. @@ -88,6 +90,8 @@ struct usb_serial_port { wait_queue_head_t write_wait; struct work_struct work; int open_count; + char throttled; + char throttle_req; struct device dev; }; #define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev) @@ -269,6 +273,8 @@ extern int usb_serial_generic_write_room (struct usb_serial_port *port); extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port); extern void usb_serial_generic_read_bulk_callback (struct urb *urb); extern void usb_serial_generic_write_bulk_callback (struct urb *urb); +extern void usb_serial_generic_throttle (struct usb_serial_port *port); +extern void usb_serial_generic_unthrottle (struct usb_serial_port *port); extern void usb_serial_generic_shutdown (struct usb_serial *serial); extern int usb_serial_generic_register (int debug); extern void usb_serial_generic_deregister (void); |