[PATCH -next 06/10] tty: Remove !tty condition from __proc_set_tty()
From: Peter Hurley <hidden>
Date: 2014-10-16 19:00:44
Also in:
lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
The tty parameter to __proc_set_tty() cannot be NULL; all call sites have already dereferenced tty. Signed-off-by: Peter Hurley <redacted> --- drivers/tty/tty_io.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index c224488..e33edfa 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c@@ -506,19 +506,18 @@ void proc_clear_tty(struct task_struct *p) static void __proc_set_tty(struct tty_struct *tty) { - if (tty) { - unsigned long flags; - /* We should not have a session or pgrp to put here but.... */ - spin_lock_irqsave(&tty->ctrl_lock, flags); - put_pid(tty->session); - put_pid(tty->pgrp); - tty->pgrp = get_pid(task_pgrp(current)); - spin_unlock_irqrestore(&tty->ctrl_lock, flags); - tty->session = get_pid(task_session(current)); - if (current->signal->tty) { - printk(KERN_DEBUG "tty not NULL!!\n"); - tty_kref_put(current->signal->tty); - } + unsigned long flags; + + /* We should not have a session or pgrp to put here but.... */ + spin_lock_irqsave(&tty->ctrl_lock, flags); + put_pid(tty->session); + put_pid(tty->pgrp); + tty->pgrp = get_pid(task_pgrp(current)); + spin_unlock_irqrestore(&tty->ctrl_lock, flags); + tty->session = get_pid(task_session(current)); + if (current->signal->tty) { + printk(KERN_DEBUG "tty not NULL!!\n"); + tty_kref_put(current->signal->tty); } put_pid(current->signal->tty_old_pgrp); current->signal->tty = tty_kref_get(tty);
--
2.1.1