diff options
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/serial.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h index ab0a32a90629..5866f19d3c7b 100644 --- a/include/linux/usb/serial.h +++ b/include/linux/usb/serial.h @@ -305,9 +305,17 @@ struct usb_serial_driver { void (*write_bulk_callback)(struct urb *urb); /* Called by the generic read bulk callback */ void (*process_read_urb)(struct urb *urb); + /* + * Called with port->lock held before preparing another write URB. + * Drivers returning false must restart the generic write path when + * writes may proceed again. + */ + bool (*write_ready)(struct usb_serial_port *port); /* Called by the generic write implementation */ int (*prepare_write_buffer)(struct usb_serial_port *port, void *dest, size_t size); + /* Called with port->lock held to roll back a failed write submission */ + void (*write_rollback)(struct usb_serial_port *port, int count); }; #define to_usb_serial_driver(d) \ container_of(d, struct usb_serial_driver, driver) |