Applied. thanks, -Len On Monday 04 February 2008 18:24, Roel Kluin wrote: > Roland Dreier wrote: > > > /* safety net should the EC not support AUTO > > > * or FULLSPEED mode bits and just ignore them */ > > > if (level & TP_EC_FAN_FULLSPEED) > > > level |= 7; /* safety min speed 7 */ > > > else if (level & TP_EC_FAN_FULLSPEED) > > > level |= 4; /* safety min speed 4 */ > > > > > > Note the duplicate test 'if (level & TP_EC_FAN_FULLSPEED)'. should > > > this be replaced by > > > > Actually I suspect one of the two tests should be against TP_EC_FAN_AUTO > > (based on the comment). > > > > Thanks Roland, for your info > > based on the comments in commit eaa7571b2d1a08873e4bdd8e6db3431df61cd9ad, > I think this should be modified like below: > > ACPI: thinkpad-acpi: add a safety net for TPEC fan control mode > The Linux ThinkPad community is not positive that all ThinkPads that do > HFSP EC fan control do implement full-speed and auto modes, some of the > earlier ones supporting HFSP might not. > > If the EC ignores the AUTO or FULL-SPEED bits, it will pay attention to the > lower three bits that set the fan level. And as thinkpad-acpi was leaving > these set to zero, it would stop(!) the fan, which is Not A Good Thing. > So, as a safety net, we now make sure to also set the fan level part of the > HFSP register to speed 7 for full-speed, and a minimum of speed 4 for auto > mode. > -- > second TP_EC_FAN_FULLSPEED should be P_EC_FAN_AUTO > > > Signed-off-by: Roel Kluin <12o3l@xxxxxxxxxx> > --- > diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c > index cf56647..3c323fe 100644 > --- a/drivers/misc/thinkpad_acpi.c > +++ b/drivers/misc/thinkpad_acpi.c > @@ -4138,7 +4138,7 @@ static int fan_set_level(int level) > * or FULLSPEED mode bits and just ignore them */ > if (level & TP_EC_FAN_FULLSPEED) > level |= 7; /* safety min speed 7 */ > - else if (level & TP_EC_FAN_FULLSPEED) > + else if (level & TP_EC_FAN_AUTO) > level |= 4; /* safety min speed 4 */ > > if (!acpi_ec_write(fan_status_offset, level)) > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
