linux-kernel - Re: [V2 PATCH 3/4] scsi:stex.c Add reboot support

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Message-ID: <20141115010342.GA5933@kroah.com>
Date:	Fri, 14 Nov 2014 17:03:42 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Charles Chiou <ch1102chiou@...il.com>, JBottomley@...allels.com,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: Re: [V2 PATCH 3/4] scsi:stex.c Add reboot support

On Wed, Nov 12, 2014 at 09:27:50AM -0800, Christoph Hellwig wrote:
> > +static int stex_reboot_callback(struct notifier_block *self,
> > +							  unsigned long val,
> > +							  void *data)
> > +{
> > +	if (val == SYS_RESTART)
> > +		isRestart = 1;
> > +	return NOTIFY_OK;
> > +}
> > 
> > @@ -1832,7 +1859,14 @@ static void stex_shutdown(struct pci_dev *pdev)
> >  {
> >  	struct st_hba *hba = pci_get_drvdata(pdev);
> > 
> > -	stex_hba_stop(hba);
> > +	if (hba->yellowstone == 1)
> > +		stex_hba_stop(hba, ST_IGNORED);
> > +	else {
> > +		if (isRestart)
> > +			stex_hba_stop(hba, ST_S6);
> > +		else
> > +			stex_hba_stop(hba, ST_S5);
> > +	}
> 
> This sort of check for reboot vs restart isn't really something
> we want in drivers.  I don't really know how we could find this
> out assuming we even want drivers to behave differently.
> 
> Maybe Greg or someone on lkml has an idea how to best handle this case.

What is "this case"?

And yes, I agree, we shouldn't care, in drivers, about reboot vs.
restart, as they should both be the same thing, along with "disconnect",
right?

thanks,

greg k-h
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