linux-kernel - Re: [PATCH v2 4/9] platform/x86/intel/ifs: Gen2 Scan test support

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Date:   Tue, 26 Sep 2023 13:20:34 +0300 (EEST)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     "Joseph, Jithu" <jithu.joseph@...el.com>
cc:     Hans de Goede <hdegoede@...hat.com>, markgross@...nel.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        rostedt@...dmis.org, ashok.raj@...el.com, tony.luck@...el.com,
        LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org, patches@...ts.linux.dev,
        ravi.v.shankar@...el.com, pengfei.xu@...el.com
Subject: Re: [PATCH v2 4/9] platform/x86/intel/ifs: Gen2 Scan test support

On Mon, 25 Sep 2023, Joseph, Jithu wrote:
> On 9/25/2023 8:39 AM, Ilpo Järvinen wrote:
> > On Fri, 22 Sep 2023, Jithu Joseph wrote:
> > 
> 
> ...
> 
> >>  
> >> -	activate.rsvd = 0;
> >>  	activate.delay = IFS_THREAD_WAIT;
> >>  	activate.sigmce = 0;
> >> -	activate.start = 0;
> >> -	activate.stop = ifsd->valid_chunks - 1;
> >> +	to_start = 0;
> >> +	to_stop = ifsd->valid_chunks - 1;
> >> +
> >> +	if (ifsd->generation) {
> >> +		activate.gen2.start = to_start;
> >> +		activate.gen2.stop = to_stop;
> >> +	} else {
> >> +		activate.gen0.start = to_start;
> >> +		activate.gen0.stop = to_stop;
> >> +	}
> > 
> > Is it okay to not do activate.gen0.rsvd = 0 anymore? If you know it is, it 
> > would be nice to record that fact into the changelog so that it can be 
> > found in the history.
> 
> I did test on a gen0 to check if there is a problem due to this (and it seemed fine).
> I will make a note in changelog as you suggest

Actually, I realized activate is a variable in stack and those bits are
uninitilized without that assignment so don't remove it.

-- 
 i.