6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans de Goede <hdegoede@xxxxxxxxxx>
[ Upstream commit b52cbca22cbf6c9d2700c1e576d0ddcc670e49d5 ]
asus-nb-wmi calls i8042_install_filter() in some cases, but it never
calls i8042_remove_filter(). This means that a dangling pointer to
the filter function is left after rmmod leading to crashes.
Fix this by moving the i8042-filter installation to the shared
asus-wmi code and also remove it from the shared code on driver unbind.
Fixes: b5643539b825 ("platform/x86: asus-wmi: Filter buggy scan codes on ASUS Q500A")
Cc: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231120154235.610808-2-hdegoede@xxxxxxxxxx
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/platform/x86/Kconfig | 2 +-
drivers/platform/x86/asus-nb-wmi.c | 11 -----------
drivers/platform/x86/asus-wmi.c | 8 ++++++++
3 files changed, 9 insertions(+), 12 deletions(-)
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 2a10705433911..07eea525091b0 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -263,6 +263,7 @@ config ASUS_WMI
depends on RFKILL || RFKILL = n
depends on HOTPLUG_PCI
depends on ACPI_VIDEO || ACPI_VIDEO = n
+ depends on SERIO_I8042 || SERIO_I8042 = n
select INPUT_SPARSEKMAP
select LEDS_CLASS
select NEW_LEDS
@@ -279,7 +280,6 @@ config ASUS_WMI
config ASUS_NB_WMI
tristate "Asus Notebook WMI Driver"
depends on ASUS_WMI
- depends on SERIO_I8042 || SERIO_I8042 = n
help
This is a driver for newer Asus notebooks. It adds extra features
like wireless radio and bluetooth control, leds, hotkeys, backlight...
diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index df1db54d4e183..af3da303e2b15 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -501,8 +501,6 @@ static const struct dmi_system_id asus_quirks[] = {
static void asus_nb_wmi_quirks(struct asus_wmi_driver *driver)
{
- int ret;
-
quirks = &quirk_asus_unknown;
dmi_check_system(asus_quirks);
@@ -517,15 +515,6 @@ static void asus_nb_wmi_quirks(struct asus_wmi_driver *driver)
if (tablet_mode_sw != -1)
quirks->tablet_switch_mode = tablet_mode_sw;
-
- if (quirks->i8042_filter) {
- ret = i8042_install_filter(quirks->i8042_filter);
- if (ret) {
- pr_warn("Unable to install key filter\n");
- return;
- }
- pr_info("Using i8042 filter function for receiving events\n");
- }
}
static const struct key_entry asus_nb_wmi_keymap[] = {
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 19bfd30861aa8..9c6321c2fc3c5 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -4437,6 +4437,12 @@ static int asus_wmi_add(struct platform_device *pdev)
goto fail_wmi_handler;
}
+ if (asus->driver->quirks->i8042_filter) {
+ err = i8042_install_filter(asus->driver->quirks->i8042_filter);
+ if (err)
+ pr_warn("Unable to install key filter - %d\n", err);
+ }
+
asus_wmi_battery_init(asus);
asus_wmi_debugfs_init(asus);
@@ -4471,6 +4477,8 @@ static int asus_wmi_remove(struct platform_device *device)
struct asus_wmi *asus;
asus = platform_get_drvdata(device);
+ if (asus->driver->quirks->i8042_filter)
+ i8042_remove_filter(asus->driver->quirks->i8042_filter);
wmi_remove_notify_handler(asus->driver->event_guid);
asus_wmi_backlight_exit(asus);
asus_wmi_input_exit(asus);
--
2.42.0
