On Friday 27 September 2019 23:19:03 Pacien TRAN-GIRARD wrote: > This patch adds a quirk disabling keyboard backlight support for the > Dell Inspiron 1012 and 1018. > > Those models wrongly report supporting keyboard backlight control > features (through SMBIOS tokens) even though they're not equipped with > a backlit keyboard. This led to broken controls being exposed > through sysfs by this driver which froze the system when used. > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=107651 > Signed-off-by: Pacien TRAN-GIRARD <pacien.trangirard@xxxxxxxxxx> > --- Thank you for update! Now it is clear what is the problem and you can add my Reviewed-by: Pali Rohár <pali.rohar@xxxxxxxxx> > drivers/platform/x86/dell-laptop.c | 26 ++++++++++++++++++++++++++ > 1 file changed, 26 insertions(+) > > diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c > index d27be2836bc2..74e988f839e8 100644 > --- a/drivers/platform/x86/dell-laptop.c > +++ b/drivers/platform/x86/dell-laptop.c > @@ -33,6 +33,7 @@ > > struct quirk_entry { > bool touchpad_led; > + bool kbd_led_not_present; > bool kbd_led_levels_off_1; > bool kbd_missing_ac_tag; > > @@ -73,6 +74,10 @@ static struct quirk_entry quirk_dell_latitude_e6410 = { > .kbd_led_levels_off_1 = true, > }; > > +static struct quirk_entry quirk_dell_inspiron_1012 = { > + .kbd_led_not_present = true, > +}; > + > static struct platform_driver platform_driver = { > .driver = { > .name = "dell-laptop", > @@ -310,6 +315,24 @@ static const struct dmi_system_id dell_quirks[] __initconst = { > }, > .driver_data = &quirk_dell_latitude_e6410, > }, > + { > + .callback = dmi_matched, > + .ident = "Dell Inspiron 1012", > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"), > + }, > + .driver_data = &quirk_dell_inspiron_1012, > + }, > + { > + .callback = dmi_matched, > + .ident = "Dell Inspiron 1018", > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1018"), > + }, > + .driver_data = &quirk_dell_inspiron_1012, > + }, > { } > }; > > @@ -1493,6 +1516,9 @@ static void kbd_init(void) > { > int ret; > > + if (quirks && quirks->kbd_led_not_present) > + return; > + > ret = kbd_init_info(); > kbd_init_tokens(); > -- Pali Rohár pali.rohar@xxxxxxxxx
