linux-kernel - [RFC][PATCH v2 16/31] timers: mISDN: Use del_timer

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Date:   Thu, 27 Oct 2022 11:05:41 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Karsten Keil <isdn@...ux-pingi.de>, netdev@...r.kernel.org
Subject: [RFC][PATCH v2 16/31] timers: mISDN: Use del_timer_shutdown() before freeing timer

From: "Steven Rostedt (Google)" <rostedt@...dmis.org>

Before a timer is freed, del_timer_shutdown() must be called.

Link: https://lore.kernel.org/all/20220407161745.7d6754b3@gandalf.local.home/

Cc: Karsten Keil <isdn@...ux-pingi.de>
Cc: netdev@...r.kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 drivers/isdn/hardware/mISDN/hfcmulti.c | 2 +-
 drivers/isdn/mISDN/l1oip_core.c        | 4 ++--
 drivers/isdn/mISDN/timerdev.c          | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 4f7eaa17fb27..8a212c17a093 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -4544,7 +4544,7 @@ release_port(struct hfc_multi *hc, struct dchannel *dch)
 	spin_lock_irqsave(&hc->lock, flags);
 
 	if (dch->timer.function) {
-		del_timer(&dch->timer);
+		del_timer_shutdown(&dch->timer);
 		dch->timer.function = NULL;
 	}
 
diff --git a/drivers/isdn/mISDN/l1oip_core.c b/drivers/isdn/mISDN/l1oip_core.c
index a77195e378b7..2d4b19e7d48b 100644
--- a/drivers/isdn/mISDN/l1oip_core.c
+++ b/drivers/isdn/mISDN/l1oip_core.c
@@ -1236,8 +1236,8 @@ release_card(struct l1oip *hc)
 
 	hc->shutdown = true;
 
-	del_timer_sync(&hc->keep_tl);
-	del_timer_sync(&hc->timeout_tl);
+	del_timer_shutdown(&hc->keep_tl);
+	del_timer_shutdown(&hc->timeout_tl);
 
 	cancel_work_sync(&hc->workq);
 
diff --git a/drivers/isdn/mISDN/timerdev.c b/drivers/isdn/mISDN/timerdev.c
index abdf36ac3bee..9d69efb8a1bc 100644
--- a/drivers/isdn/mISDN/timerdev.c
+++ b/drivers/isdn/mISDN/timerdev.c
@@ -74,7 +74,7 @@ mISDN_close(struct inode *ino, struct file *filep)
 	while (!list_empty(list)) {
 		timer = list_first_entry(list, struct mISDNtimer, list);
 		spin_unlock_irq(&dev->lock);
-		del_timer_sync(&timer->tl);
+		del_timer_shutdown(&timer->tl);
 		spin_lock_irq(&dev->lock);
 		/* it might have been moved to ->expired */
 		list_del(&timer->list);
@@ -204,7 +204,7 @@ misdn_del_timer(struct mISDNtimerdev *dev, int id)
 			list_del_init(&timer->list);
 			timer->id = -1;
 			spin_unlock_irq(&dev->lock);
-			del_timer_sync(&timer->tl);
+			del_timer_shutdown(&timer->tl);
 			kfree(timer);
 			return id;
 		}
-- 
2.35.1