Re: [PATCH] hwmon: (dell-smm) Add XPS 15 L502X to fan control blacklist

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On Mon, Jan 25, 2021 at 11:05:40AM +0100, Pali Rohár wrote:
> On Saturday 23 January 2021 18:46:08 Thomas Hebb wrote:
> > It has been reported[0] that the Dell XPS 15 L502X exhibits similar
> > freezing behavior to the other systems[1] on this blacklist. The issue
> > was exposed by a prior change of mine to automatically load
> > dell_smm_hwmon on a wider set of XPS models. To fix the regression, add
> > this model to the blacklist.
> > 
> > [0] https://bugzilla.kernel.org/show_bug.cgi?id=211081
> > [1] https://bugzilla.kernel.org/show_bug.cgi?id=195751
> > 
> > Fixes: b8a13e5e8f37 ("hwmon: (dell-smm) Use one DMI match for all XPS models")
> > Cc: stable@xxxxxxxxxxxxxxx
> > Reported-by: Bob Hepple <bob.hepple@xxxxxxxxx>
> > Tested-by: Bob Hepple <bob.hepple@xxxxxxxxx>
> > Signed-off-by: Thomas Hebb <tommyhebb@xxxxxxxxx>
> > ---
> > 
> >  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 ec448f5f2dc3..73b9db9e3aab 100644
> > --- a/drivers/hwmon/dell-smm-hwmon.c
> > +++ b/drivers/hwmon/dell-smm-hwmon.c
> > @@ -1159,6 +1159,13 @@ static struct dmi_system_id i8k_blacklist_fan_support_dmi_table[] __initdata = {
> >  			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
> >  		},
> >  	},
> > +	{
> > +		.ident = "Dell XPS 15 L502X",
> > +		.matches = {
> > +			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
> > +			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L502X"),
> 
> Hello! Are you sure that it is required to completely disable fan
> support? And not only access to fan type label for which is different
> blaclist i8k_blacklist_fan_type_dmi_table?
> 

I'll drop this patch from my branch. Please send a Reviewed-by: or Acked-by: tag
if/when I should apply it.

Thanks,
Guenter



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