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SubjectRe: [PATCH] hwmon: (dell-smm) Disable fan support for Dell XPS13 9333
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Date
On 06/06/2018 08:21 AM, Pali Rohár 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@elchenberg.name>
>> ---
>> 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"),
>> + },
>> + },
>> { }
>> };
>>
>

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