FAILED: patch "[PATCH] spi: mpc52xx: fix use-after-free on registration failure" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-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-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x f62c060272b9d7423b1650b844e8e4e7b8f9f925
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026051503-raider-resolved-9f9d@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From f62c060272b9d7423b1650b844e8e4e7b8f9f925 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Tue, 21 Apr 2026 14:58:00 +0200
Subject: [PATCH] spi: mpc52xx: fix use-after-free on registration failure

Make sure to disable and free the interrupts in case controller registration fails to avoid a potential use-after-free and resource leak.

This issue was flagged by Sashiko when reviewing a controller deregistration fix.

index c8c8e6bdf421..924d820448fb 100644
@@ -498,6 +498,9 @@ static int mpc52xx_spi_probe(struct platform_device *op)
 
  err_register:
 	dev_err(&ms->host->dev, "initialization failed\n");
+	free_irq(ms->irq0, ms);
+	free_irq(ms->irq1, ms);
+	cancel_work_sync(&ms->work);
  err_gpio:
 	while (i-- > 0)
 		gpiod_put(ms->gpio_cs[i]);