This is a note to let you know that I've just added the patch titled
platform/x86: ideapad-laptop: introduce a generic notification chain
to the 6.10-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:
platform-x86-ideapad-laptop-introduce-a-generic-noti.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e20de6a808688b6802b00d2180a71ac767b90726
Author: Gergo Koteles <soyer@xxxxxx>
Date: Thu Jul 25 11:21:07 2024 +0200
platform/x86: ideapad-laptop: introduce a generic notification chain
[ Upstream commit 613e3900c24bb1379d994f44d75d31c3223cc263 ]
There are several cases where a notification chain can simplify Lenovo
WMI drivers.
Add a generic notification chain into ideapad-laptop.
Signed-off-by: Gergo Koteles <soyer@xxxxxx>
Link: https://lore.kernel.org/r/c5a43efae8a32bd034c3d19c0a686941347575a7.1721898747.git.soyer@xxxxxx
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Stable-dep-of: 7cc06e729460 ("platform/x86: ideapad-laptop: add a mutex to synchronize VPC commands")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index fcf13d88fd6ed..38d98ee558d32 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -1599,6 +1599,39 @@ static void ideapad_sync_touchpad_state(struct ideapad_private *priv, bool send_
priv->r_touchpad_val = value;
}
+static int ideapad_laptop_nb_notify(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ switch (action) {
+ }
+
+ return 0;
+}
+
+static struct notifier_block ideapad_laptop_notifier = {
+ .notifier_call = ideapad_laptop_nb_notify,
+};
+
+static BLOCKING_NOTIFIER_HEAD(ideapad_laptop_chain_head);
+
+int ideapad_laptop_register_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&ideapad_laptop_chain_head, nb);
+}
+EXPORT_SYMBOL_NS_GPL(ideapad_laptop_register_notifier, IDEAPAD_LAPTOP);
+
+int ideapad_laptop_unregister_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&ideapad_laptop_chain_head, nb);
+}
+EXPORT_SYMBOL_NS_GPL(ideapad_laptop_unregister_notifier, IDEAPAD_LAPTOP);
+
+void ideapad_laptop_call_notifier(unsigned long action, void *data)
+{
+ blocking_notifier_call_chain(&ideapad_laptop_chain_head, action, data);
+}
+EXPORT_SYMBOL_NS_GPL(ideapad_laptop_call_notifier, IDEAPAD_LAPTOP);
+
static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
{
struct ideapad_private *priv = data;
@@ -1983,6 +2016,8 @@ static int ideapad_acpi_add(struct platform_device *pdev)
if (err)
goto shared_init_failed;
+ ideapad_laptop_register_notifier(&ideapad_laptop_notifier);
+
return 0;
shared_init_failed:
@@ -2015,6 +2050,8 @@ static void ideapad_acpi_remove(struct platform_device *pdev)
struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
int i;
+ ideapad_laptop_unregister_notifier(&ideapad_laptop_notifier);
+
ideapad_shared_exit(priv);
acpi_remove_notify_handler(priv->adev->handle,
diff --git a/drivers/platform/x86/ideapad-laptop.h b/drivers/platform/x86/ideapad-laptop.h
index 4498a96de5976..3eb0dcd6bf7ba 100644
--- a/drivers/platform/x86/ideapad-laptop.h
+++ b/drivers/platform/x86/ideapad-laptop.h
@@ -12,6 +12,11 @@
#include <linux/acpi.h>
#include <linux/jiffies.h>
#include <linux/errno.h>
+#include <linux/notifier.h>
+
+int ideapad_laptop_register_notifier(struct notifier_block *nb);
+int ideapad_laptop_unregister_notifier(struct notifier_block *nb);
+void ideapad_laptop_call_notifier(unsigned long action, void *data);
enum {
VPCCMD_R_VPC1 = 0x10,
