diff options
Diffstat (limited to 'include/linux/tty_port.h')
| -rw-r--r-- | include/linux/tty_port.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/tty_port.h b/include/linux/tty_port.h index 660c254f1efe..23cad403bb8f 100644 --- a/include/linux/tty_port.h +++ b/include/linux/tty_port.h @@ -6,10 +6,10 @@ #include <linux/kref.h> #include <linux/mutex.h> #include <linux/tty_buffer.h> +#include <linux/tty_driver.h> #include <linux/wait.h> struct attribute_group; -struct tty_driver; struct tty_port; struct tty_struct; @@ -138,6 +138,7 @@ struct tty_port { kernel */ void tty_port_init(struct tty_port *port); +void tty_port_link_wq(struct tty_port *port, struct workqueue_struct *flip_wq); void tty_port_link_device(struct tty_port *port, struct tty_driver *driver, unsigned index); struct device *tty_port_register_device(struct tty_port *port, @@ -165,6 +166,18 @@ static inline struct tty_port *tty_port_get(struct tty_port *port) return NULL; } +/* + * Never overwrite the workqueue set by tty_port_link_wq(). + * No effect when %TTY_DRIVER_NO_WORKQUEUE is set, as driver->flip_wq is + * %NULL. + */ +static inline void tty_port_link_driver_wq(struct tty_port *port, + struct tty_driver *driver) +{ + if (!port->buf.flip_wq) + tty_port_link_wq(port, driver->flip_wq); +} + /* If the cts flow control is enabled, return true. */ static inline bool tty_port_cts_enabled(const struct tty_port *port) { |