HID: refactor mapping to input subsystem for quirky devices

[linux-2.6-omap-h63xx.git] / drivers / char / tty_ioctl.c

diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index e02d59245a17ecf6b1d78ffd66f5d68c8ead261d..d4b6d64e858b5e4ec18255a992ce0e57a0cbd92b 100644 (file)
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -364,6 +364,25 @@ void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old)
 
 EXPORT_SYMBOL(tty_termios_copy_hw);
 
+/**
+ *     tty_termios_hw_change   -       check for setting change
+ *     @a: termios
+ *     @b: termios to compare
+ *
+ *     Check if any of the bits that affect a dumb device have changed
+ *     between the two termios structures, or a speed change is needed.
+ */
+
+int tty_termios_hw_change(struct ktermios *a, struct ktermios *b)
+{
+       if (a->c_ispeed != b->c_ispeed || a->c_ospeed != b->c_ospeed)
+               return 1;
+       if ((a->c_cflag ^ b->c_cflag) & ~(HUPCL | CREAD | CLOCAL))
+               return 1;
+       return 0;
+}
+EXPORT_SYMBOL(tty_termios_hw_change);
+
 /**
  *     change_termios          -       update termios values
  *     @tty: tty to update