On Tuesday 05 July 2016 13:51:42 Mika Westerberg wrote:
> On Tue, Jul 05, 2016 at 01:30:23PM +0200, Pali Rohár wrote:
> > On Tuesday 05 July 2016 12:14:55 Mika Westerberg wrote:
> > > The whole point of this patch is that we expect that nobody never
> > > uses that OpRegion. I'm 99% sure you don't find a single machine
> > > where it is actually in use.
> >
> > HP EliteBook 8460p uses it for sure! Here are DSDT snips:
> > Method (\_SB.PCI0.LPCB.SMAB, 3, Serialized)
> > {
> >
> > If (LEqual (And (Arg0, 0x01), 0x00))
> > {
> >
> > Store (0x01, Local0)
> > Store (\_SB.PCI0.SBUS.SWRB (Arg0, Arg1,
> > Arg2), Local1) If (Local1)
> > {
> >
> > Store (0x00, Local0)
> >
> > }
> >
> > }
> > Else
> > {
> >
> > Store (\_SB.PCI0.SBUS.SRDB (Arg0, Arg1),
> > Local0)
> >
> > }
> >
> > Return (Local0)
> >
> > }
>
> Crap, well that is in that 1% then ;-)
I bet that every HP notebook with accelerometer which is used by
hp_accel.ko driver is affected by this problem. And then it will be more
then 1% :-)
> > ...
> >
> > Method (ALRD, 1, Serialized)
> > {
> >
> > Store (\_SB.PCI0.LPCB.SMAB (0x33, Arg0, 0x00),
> > Local0) Return (Local0)
> >
> > }
> >
> > Method (ALWR, 2, Serialized)
> > {
> >
> > Store (\_SB.PCI0.LPCB.SMAB (0x32, Arg0, Arg1),
> > Local0) Return (Local0)
> >
> > }
> >
> > And ALRD and ALWR methods are used by hp_accel.ko kernel driver.
>
> So are you able to test what happens when you unload the driver?
As I wrote in previous email, I do not own these EliteBooks anymore, so
cannot test it. Just have DSDT dump...
--
Pali Rohár
pali.rohar@xxxxxxxxx
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