Re: [PATCH] hwmon: (dell-smm) Disable fan support for Dell XPS13 9333

[Guenter Roeck]

On 06/06/2018 08:21 AM, Pali RohÃr wrote:
> On Tuesday 05 June 2018 19:38:32 Helge Eichelberg wrote:
> > Calling fan related SMM functions implemented by Dell BIOS firmware on Dell
> > XPS13 9333 freeze kernel for about 500ms. Until Dell fixes it we need to
> > disable fan support for Dell XPS13 9333.
>
> Hi! Have you reported this firmware bug to Dell?
>
> Also we should probably match also BIOS version and do not apply this
> blacklist quirk for BIOS versions in which Dell fixed it.

Is it known to have been fixed ? If so, why report it to Dell ?

If the problem is not known to be fixed, we have no BIOS version to match against.

Guenter

> > Via "force" module param fan support can be enabled.
> >
> > Link: https://bugzilla.kernel.org/show_bug.cgi?id=195751
> > Signed-off-by: Helge Eichelberg <kernelorg@xxxxxxxxxxxxxxx>
> > ---
> >   drivers/hwmon/dell-smm-hwmon.c | 7 +++++++
> >   1 file changed, 7 insertions(+)
> >
> > diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
> > index bf3bb7e1adab..9d3ef879dc51 100644
> > --- a/drivers/hwmon/dell-smm-hwmon.c
> > +++ b/drivers/hwmon/dell-smm-hwmon.c
> > @@ -1074,6 +1074,13 @@ static struct dmi_system_id i8k_blacklist_fan_support_dmi_table[] __initdata = {
> >   			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
> >   		},
> >   	},
> > +	{
> > +		.ident = "Dell XPS13 9333",
> > +		.matches = {
> > +			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
> > +			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
> > +		},
> > +	},
> >   	{ }
> >   };
> >