From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Hurley Subject: [PATCH -next 06/10] tty: Remove !tty condition from __proc_set_tty() Date: Thu, 16 Oct 2014 14:59:46 -0400 Message-ID: <1413485990-16855-7-git-send-email-peter@hurleysoftware.com> References: <1413485990-16855-1-git-send-email-peter@hurleysoftware.com> Return-path: In-Reply-To: <1413485990-16855-1-git-send-email-peter@hurleysoftware.com> Sender: linux-kernel-owner@vger.kernel.org To: Greg Kroah-Hartman Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Jiri Slaby , One Thousand Gnomes , Peter Hurley List-Id: linux-serial@vger.kernel.org The tty parameter to __proc_set_tty() cannot be NULL; all call sites have already dereferenced tty. Signed-off-by: Peter Hurley --- 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