FAILED: patch "[PATCH] gpio: mpsse: fix reference leak in gpio_mpsse_probe() error" failed to apply to 6.18-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 6.18-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 <stable@vger.kernel.org>.

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-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x 1e876e5a0875e71e34148c9feb2eedd3bf6b2b43
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026011202-scheming-operating-3cbb@gregkh' --subject-prefix 'PATCH 6.18.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From 1e876e5a0875e71e34148c9feb2eedd3bf6b2b43 Mon Sep 17 00:00:00 2001
From: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Date: Fri, 26 Dec 2025 11:34:10 +0530
Subject: [PATCH] gpio: mpsse: fix reference leak in gpio_mpsse_probe() error
 paths

The reference obtained by calling usb_get_dev() is not released in the
gpio_mpsse_probe() error paths. Fix that by using device managed helper
functions. Also remove the usb_put_dev() call in the disconnect function
since now it will be released automatically.

Cc: stable@vger.kernel.org
Fixes: c46a74ff05c0 ("gpio: add support for FTDI's MPSSE as GPIO")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Link: https://lore.kernel.org/r/20251226060414.20785-1-nihaal@cse.iitm.ac.in
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

diff --git a/drivers/gpio/gpio-mpsse.c b/drivers/gpio/gpio-mpsse.c
index ace652ba4df1..12191aeb6566 100644
--- a/drivers/gpio/gpio-mpsse.c
+++ b/drivers/gpio/gpio-mpsse.c
@@ -548,6 +548,13 @@ static void gpio_mpsse_ida_remove(void *data)
 	ida_free(&gpio_mpsse_ida, priv->id);
 }
 
+static void gpio_mpsse_usb_put_dev(void *data)
+{
+	struct mpsse_priv *priv = data;
+
+	usb_put_dev(priv->udev);
+}
+
 static int mpsse_init_valid_mask(struct gpio_chip *chip,
 				 unsigned long *valid_mask,
 				 unsigned int ngpios)
@@ -592,6 +599,10 @@ static int gpio_mpsse_probe(struct usb_interface *interface,
 	INIT_LIST_HEAD(&priv->workers);
 
 	priv->udev = usb_get_dev(interface_to_usbdev(interface));
+	err = devm_add_action_or_reset(dev, gpio_mpsse_usb_put_dev, priv);
+	if (err)
+		return err;
+
 	priv->intf = interface;
 	priv->intf_id = interface->cur_altsetting->desc.bInterfaceNumber;
 
@@ -713,7 +724,6 @@ static void gpio_mpsse_disconnect(struct usb_interface *intf)
 
 	priv->intf = NULL;
 	usb_set_intfdata(intf, NULL);
-	usb_put_dev(priv->udev);
 }
 
 static struct usb_driver gpio_mpsse_driver = {