linux-kernel - RE: [char-misc 3.11 V2] mei: me: fix hardware reset flow

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Message-ID: <5B8DA87D05A7694D9FA63FD143655C1B1AE783C8@HASMSX106.ger.corp.intel.com>
Date:	Tue, 30 Jul 2013 14:28:55 +0000
From:	"Winkler, Tomas" <tomas.winkler@...el.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	"arnd@...db.de" <arnd@...db.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Shuah Khan <shuah.kh@...sung.com>,
	"Konstantin Khlebnikov" <khlebnikov@...nvz.org>
Subject: RE: [char-misc 3.11 V2] mei: me: fix hardware reset flow


> Subject: Re: [char-misc 3.11 V2] mei: me: fix hardware reset flow
> 
> On Tue, Jul 30, 2013 at 02:11:51PM +0300, Tomas Winkler wrote:
> > Both H_IS and H_IE needs to be set to receive H_RDY interrupt
> >
> > 1. Assert H_IS to clear the interrupts during hw reset and use
> > mei_me_reg_write instead of mei_hcsr_set as the later strips down the
> > H_IS
> >
> > 2. fix interrupt disablement embarrassing typo
> >   hcsr |= ~H_IE -> hcsr &= ~H_IE;
> > this will remove the unwanted interrupt on power down
> >
> > 3. remove useless debug print outs
> >
> > Cc: Shuah Khan <shuah.kh@...sung.com>
> > Cc: Konstantin Khlebnikov <khlebnikov@...nvz.org>
> > Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> > ---
> >
> > V2: Fixed typo in Shuah email
> >
> > Hope this finally resolve the ME reset issue for all
> 
> Can I get a "Tested-by:" from someone to ensure that it really does solve the
> problem?

Yes,  please wait for ack/test results. It works for me but unfortunately I cannot go over all  9 gens of  PCH and all their proliferations  where ME resides. 
I'm putting some effort to have better legacy HW testing coverage but I'm not there yet.

Thanks
Tomas 


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