Author: kib
Date: Mon Aug 20 12:07:10 2012
New Revision: 239414
URL: http://svn.freebsd.org/changeset/base/239414

Log:
  MFC r232197 (on behalf of phk):
  Also call the low-level driver if ->c_iflag & (IXON|IXOFF|IXANY) changes.
  
  Uftdi(4) examines (c_iflag & (IXON|IXOFF)) to control hw XON-XOFF support.
  This is obviously no good, if changes to those bits are not communicated
  down the stack.

Modified:
  stable/9/sys/kern/tty.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/tty.c
==============================================================================
--- stable/9/sys/kern/tty.c     Mon Aug 20 11:51:49 2012        (r239413)
+++ stable/9/sys/kern/tty.c     Mon Aug 20 12:07:10 2012        (r239414)
@@ -1498,6 +1498,8 @@ tty_generic_ioctl(struct tty *tp, u_long
                 */
                if ((t->c_cflag & CIGNORE) == 0 &&
                    (tp->t_termios.c_cflag != t->c_cflag ||
+                   ((tp->t_termios.c_iflag ^ t->c_iflag) &
+                   (IXON|IXOFF|IXANY)) ||
                    tp->t_termios.c_ispeed != t->c_ispeed ||
                    tp->t_termios.c_ospeed != t->c_ospeed)) {
                        error = ttydevsw_param(tp, t);
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