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platform/x86: asus-wmi: Move i8042 filter install to shared asus-wmi code

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[ 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@rempel-privat.de>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20231120154235.610808-2-hdegoede@redhat.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hans de Goede 2023-11-20 16:42:33 +01:00 • committed by Ksawlii
parent c6cb40bcad
commit f660e1f606
3 changed files with 9 additions and 12 deletions
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2
drivers/platform/x86/Kconfig
View file

@ -243,6 +243,7 @@ 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
@ -256,7 +257,6 @@ 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...

11
drivers/platform/x86/asus-nb-wmi.c
View file

@ -490,8 +490,6 @@ 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);
@ -506,15 +504,6 @@ 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[] = {

8
drivers/platform/x86/asus-wmi.c
View file

@ -2779,6 +2779,12 @@ 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);
@ -2810,6 +2816,8 @@ 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);