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authorMatthias Goebl <matthias.goebl@goebl.net>2008-01-04 02:19:30 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-04 03:55:40 -0800
commit00409bb045887ec5e7b9e351bc080c38ab6bfd33 (patch)
tree829ec62282d291df72e0e1ab653bc4b5eb2da86e
parent134d99e302618eeb102c2a5be1f9e98696288bdd (diff)
downloadlinux-00409bb045887ec5e7b9e351bc080c38ab6bfd33.tar.bz2
[ISDN] i4l: 'NO CARRIER' message lost after ldisc flush
The ISDN tty layer doesn't produce a 'NO CARRIER' message after hangup. I suppose it broke when tty_buffer_flush() has been added to tty_ldisc_flush() in the commit below. For isdn_tty_modem_result(RESULT_NO_CARRIER..) the message inserted via isdn_tty_at_cout() -> tty_insert_flip_char() is flushed immediately by tty_ldisc_flush() -> tty_buffer_flush(). More annoyingly, the audio abort sequence DLE-ETX is also lost. This patch fixes only active audio connections, because I assume that nobody changes the line discipline for audio. For non-audio connections the problem remains. Maybe we can remove the tty_ldisc_flush() in isdn_tty_modem_result() at all because it's done at tty_close? On Mon, May 07, 2007 at 04:05:57PM -0500, Paul Fulghum wrote: > Flush the tty flip buffer when the line discipline > input queue is flushed, including the user call > tcflush(TCIFLUSH/TCIOFLUSH). This prevents unexpected > stale data after a user application calls tcflush(). > > Cc: Alan Cox <alan@lxorguk.org.uk> > Cc: Antonino Ingargiola <tritemio@gmail.com> > Signed-off-by: Paul Fulghum <paulkf@microgate.com> > > --- a/drivers/char/tty_io.c 2007-05-04 05:46:55.000000000 -0500 > +++ b/drivers/char/tty_io.c 2007-05-05 03:23:46.000000000 -0500 > @@ -1240,6 +1263,7 @@ void tty_ldisc_flush(struct tty_struct * > ld->flush_buffer(tty); > tty_ldisc_deref(ld); > } > + tty_buffer_flush(tty); [..] Signed-off-by: Matthias Goebl <matthias.goebl@goebl.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/isdn/i4l/isdn_tty.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index 4e5f87c1e714..24679a3f5596 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -2645,7 +2645,12 @@ isdn_tty_modem_result(int code, modem_info * info)
if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
return;
}
+#ifdef CONFIG_ISDN_AUDIO
+ if ( !info->vonline )
+ tty_ldisc_flush(info->tty);
+#else
tty_ldisc_flush(info->tty);
+#endif
if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
(!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
(info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {