Patch "gpio: sim: lock hog configfs items if present" has been added to the 6.12-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    gpio: sim: lock hog configfs items if present

to the 6.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpio-sim-lock-hog-configfs-items-if-present.patch
and it can be found in the queue-6.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit cb74157dc98c075c5bb905ad002c7f6d7424423a
Author: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Date:   Mon Feb 3 12:01:23 2025 +0100

    gpio: sim: lock hog configfs items if present
    
    [ Upstream commit 015b7dae084fa95465ff89f6cbf15fe49906a370 ]
    
    Depending on the user config, the leaf entry may be the hog directory,
    not line. Check it and lock the correct item.
    
    Fixes: 8bd76b3d3f3a ("gpio: sim: lock up configfs that an instantiated device depends on")
    Tested-by: Koichiro Den <koichiro.den@xxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20250203110123.87701-1-brgl@xxxxxxxx
    Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index deedacdeb2395..f83a8b5a51d0d 100644
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -1036,20 +1036,23 @@ gpio_sim_device_lockup_configfs(struct gpio_sim_device *dev, bool lock)
 	struct configfs_subsystem *subsys = dev->group.cg_subsys;
 	struct gpio_sim_bank *bank;
 	struct gpio_sim_line *line;
+	struct config_item *item;
 
 	/*
-	 * The device only needs to depend on leaf line entries. This is
+	 * The device only needs to depend on leaf entries. This is
 	 * sufficient to lock up all the configfs entries that the
 	 * instantiated, alive device depends on.
 	 */
 	list_for_each_entry(bank, &dev->bank_list, siblings) {
 		list_for_each_entry(line, &bank->line_list, siblings) {
+			item = line->hog ? &line->hog->item
+					 : &line->group.cg_item;
+
 			if (lock)
-				WARN_ON(configfs_depend_item_unlocked(
-						subsys, &line->group.cg_item));
+				WARN_ON(configfs_depend_item_unlocked(subsys,
+								      item));
 			else
-				configfs_undepend_item_unlocked(
-						&line->group.cg_item);
+				configfs_undepend_item_unlocked(item);
 		}
 	}
 }