The patch below does not apply to the 6.12-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-6.12.y git checkout FETCH_HEAD git cherry-pick -x 24ec03cc55126b7b3adf102f4b3d9f716532b329 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025122929-reoccupy-raking-f984@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 24ec03cc55126b7b3adf102f4b3d9f716532b329 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko andriy.shevchenko@linux.intel.com Date: Thu, 27 Nov 2025 17:36:50 +0100 Subject: [PATCH] serial: core: Restore sysfs fwnode information

The change that restores sysfs fwnode information does it only for OF cases. Update the fix to cover all possible types of fwnodes.

Fixes: d36f0e9a0002 ("serial: core: restore of_node information in sysfs") Cc: stable stable@kernel.org Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Link: https://patch.msgid.link/20251127163650.2942075-1-andriy.shevchenko@linux.in... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

diff --git a/drivers/tty/serial/serial_base_bus.c b/drivers/tty/serial/serial_base_bus.c index 22749ab0428a..8e891984cdc0 100644 --- a/drivers/tty/serial/serial_base_bus.c +++ b/drivers/tty/serial/serial_base_bus.c @@ -13,7 +13,7 @@ #include <linux/device.h> #include <linux/idr.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/property.h> #include <linux/serial_core.h> #include <linux/slab.h> #include <linux/spinlock.h> @@ -60,6 +60,7 @@ void serial_base_driver_unregister(struct device_driver *driver) driver_unregister(driver); }

+/* On failure the caller must put device @dev with put_device() */ static int serial_base_device_init(struct uart_port *port, struct device *dev, struct device *parent_dev, @@ -73,7 +74,8 @@ static int serial_base_device_init(struct uart_port *port, dev->parent = parent_dev; dev->bus = &serial_base_bus_type; dev->release = release; - device_set_of_node_from_dev(dev, parent_dev); + + device_set_node(dev, fwnode_handle_get(dev_fwnode(parent_dev)));

if (!serial_base_initialized) { dev_dbg(port->dev, "uart_add_one_port() called before arch_initcall()?\n"); @@ -94,7 +96,7 @@ static void serial_base_ctrl_release(struct device *dev) { struct serial_ctrl_device *ctrl_dev = to_serial_base_ctrl_device(dev);

- of_node_put(dev->of_node); + fwnode_handle_put(dev_fwnode(dev)); kfree(ctrl_dev); }

@@ -142,7 +144,7 @@ static void serial_base_port_release(struct device *dev) { struct serial_port_device *port_dev = to_serial_base_port_device(dev);

- of_node_put(dev->of_node); + fwnode_handle_put(dev_fwnode(dev)); kfree(port_dev); }