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n_tty: Fix missing newline echo 

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.

Cc: <stable@vger.kernel.org> # 3.12.x
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>
This commit is contained in:
Peter Hurley 2013-11-29 12:56:10 -05:00 committed by Greg Kroah-Hartman
parent c42b4e6501
commit 39434abd94
1 changed files with 4 additions and 2 deletions
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6
drivers/tty/n_tty.c
View File

@ -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);