lkml.org 
[lkml]   [2014]   [Oct]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH -next 9/9] n_tty: Only process packet mode data in raw mode
Date
Packet mode can only be set for a pty master, and a pty master is
always in raw mode since its termios cannot be changed.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
drivers/tty/n_tty.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 602dbc2..379f60c 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2228,16 +2228,6 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
}
__set_current_state(TASK_RUNNING);

- /* Deal with packet mode. */
- if (packet && b == buf) {
- if (tty_put_user(tty, TIOCPKT_DATA, b++)) {
- retval = -EFAULT;
- b--;
- break;
- }
- nr--;
- }
-
if (ldata->icanon && !L_EXTPROC(tty)) {
retval = canon_copy_from_read_buf(tty, &b, &nr);
if (retval == -EAGAIN) {
@@ -2247,6 +2237,17 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
break;
} else {
int uncopied;
+
+ /* Deal with packet mode. */
+ if (packet && b == buf) {
+ if (tty_put_user(tty, TIOCPKT_DATA, b++)) {
+ retval = -EFAULT;
+ b--;
+ break;
+ }
+ nr--;
+ }
+
/* The copy function takes the read lock and handles
locking internally for this case */
uncopied = copy_from_read_buf(tty, &b, &nr);
--
2.1.1


\
 
 \ /
  Last update: 2014-10-16 22:01    [W:0.722 / U:0.760 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site