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-rw-r--r--include/linux/tty_driver.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index e1065ac0d92..16d27944c32 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -168,6 +168,18 @@
*
* Optional: If not provided then the write method is called under
* the atomic write lock to keep it serialized with the ldisc.
+ *
+ * int (*resize)(struct tty_struct *tty, struct tty_struct *real_tty,
+ * unsigned int rows, unsigned int cols);
+ *
+ * Called when a termios request is issued which changes the
+ * requested terminal geometry.
+ *
+ * Optional: the default action is to update the termios structure
+ * without error. This is usually the correct behaviour. Drivers should
+ * not force errors here if they are not resizable objects (eg a serial
+ * line). See tty_do_resize() if you need to wrap the standard method
+ * in your own logic - the usual case.
*/
#include <linux/fs.h>
@@ -206,6 +218,8 @@ struct tty_operations {
int (*tiocmget)(struct tty_struct *tty, struct file *file);
int (*tiocmset)(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
+ int (*resize)(struct tty_struct *tty, struct tty_struct *real_tty,
+ struct winsize *ws);
#ifdef CONFIG_CONSOLE_POLL
int (*poll_init)(struct tty_driver *driver, int line, char *options);
int (*poll_get_char)(struct tty_driver *driver, int line);