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authorPeter Hurley <peter@hurleysoftware.com>2013-11-29 12:56:10 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-11 22:37:55 -0800
commit8aa61f36bb68b7544a7c955658e29556f866bb6a (patch)
treedff9634af64e1dad4314593841be276553429556 /drivers/tty
parent003bd1d4842bb9a34cbd1513e19183e94323931f (diff)
n_tty: Fix missing newline echo
commit 39434abd942c8e4b9c14c06a03b3245beaf8467f upstream. When L_ECHONL is on, newlines are echoed regardless of the L_ECHO state; if set, ensure accumulated echoes are flushed before finishing the current input processing and before more output. Reported-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/n_tty.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index ff582933e94c..4d6f430087d0 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -810,7 +810,8 @@ static void process_echoes(struct tty_struct *tty)
struct n_tty_data *ldata = tty->disc_data;
size_t echoed;
- if (!L_ECHO(tty) || ldata->echo_commit == ldata->echo_tail)
+ if ((!L_ECHO(tty) && !L_ECHONL(tty)) ||
+ ldata->echo_commit == ldata->echo_tail)
return;
mutex_lock(&ldata->output_lock);
@@ -825,7 +826,8 @@ static void flush_echoes(struct tty_struct *tty)
{
struct n_tty_data *ldata = tty->disc_data;
- if (!L_ECHO(tty) || ldata->echo_commit == ldata->echo_head)
+ if ((!L_ECHO(tty) && !L_ECHONL(tty)) ||
+ ldata->echo_commit == ldata->echo_head)
return;
mutex_lock(&ldata->output_lock);