FAILED: patch "[PATCH] comedi: jr3_pci: Fix synchronous deletion of timer" failed to apply to 6.14-stable tree

The patch below does not apply to the 6.14-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.14.y
git checkout FETCH_HEAD
git cherry-pick -x 44d9b3f584c59a606b521e7274e658d5b866c699
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2025042805-agonize-founder-450f@gregkh' --subject-prefix 'PATCH 6.14.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 44d9b3f584c59a606b521e7274e658d5b866c699 Mon Sep 17 00:00:00 2001
From: Ian Abbott <[email protected]>
Date: Tue, 15 Apr 2025 13:39:01 +0100
Subject: [PATCH] comedi: jr3_pci: Fix synchronous deletion of timer

When jr3_pci_detach() is called during device removal, it calls timer_delete_sync() to stop the timer, but the timer expiry function always reschedules the timer, so the synchronization is ineffective.

Call timer_shutdown_sync() instead. It does not matter that the timer expiry function pointer is cleared, because the device is being removed.

index cdc842b32bab..75dce1ff2419 100644
@@ -758,7 +758,7 @@ static void jr3_pci_detach(struct comedi_device *dev)
 	struct jr3_pci_dev_private *devpriv = dev->private;
 
 	if (devpriv)
-		timer_delete_sync(&devpriv->timer);
+		timer_shutdown_sync(&devpriv->timer);
 
 	comedi_pci_detach(dev);
 }

commit 44d9b3f584c59a606b521e7274e658d5b866c699 upstream.

When jr3_pci_detach() is called during device removal, it calls timer_delete_sync() to stop the timer, but the timer expiry function always reschedules the timer, so the synchronization is ineffective.

Call timer_shutdown_sync() instead. It does not matter that the timer expiry function pointer is cleared, because the device is being removed.

---
 drivers/comedi/drivers/jr3_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 951c23fa0369..75dce1ff2419 100644
@@ -758,7 +758,7 @@ static void jr3_pci_detach(struct comedi_device *dev)
 	struct jr3_pci_dev_private *devpriv = dev->private;
 
 	if (devpriv)
-		del_timer_sync(&devpriv->timer);
+		timer_shutdown_sync(&devpriv->timer);
 
 	comedi_pci_detach(dev);
 }

2.47.2