Re: [patch 2.6.13-rc2] pci: restore BAR values from pci_set_power_state for D3hot->D0

["John W. Linville" <linville@tuxdriver.com>]

On Tue, Jul 26, 2005 at 04:49:34PM -0700, Greg KH wrote:
> On Fri, Jul 08, 2005 at 02:34:56PM -0400, John W. Linville wrote:
> > @@ -301,6 +335,16 @@ pci_set_power_state(struct pci_dev *dev,
> >  		udelay(200);
> >  	dev->current_state = state;
> >  
> > +	/* According to section 5.4.1 of the "PCI BUS POWER MANAGEMENT
> > +	 * INTERFACE SPECIFICATION, REV. 1.2", a device transitioning
> > +	 * from D3hot to D0 _may_ perform an internal reset, thereby
> > +	 * going to "D0 Uninitialized" rather than "D0 Initialized".
> > +	 * In that case, we need to restore at least the BARs so that
> > +	 * the device will be accessible to its driver.
> > +	 */
> > +	if (need_restore)
> > +		pci_restore_bars(dev);
> > +
> 
> This code doesn't even build, as need_restore isn't a global variable.

Hmmm...you must be missing this hunk from the patch posted on July 8?

@@ -239,7 +270,7 @@ pci_find_parent_resource(const struct pc
 int
 pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 {
-	int pm;
+	int pm, need_restore = 0;
	u16 pmcsr, pmc;

	/* bound the state we're entering */

 
> Care to redo this patch (and merge it with your other one) and resend
> it?

I'll be happy to do so, and include the other comment tweaks that
Grant requested.  I should get to it tomorrow morning.

Thanks,

John
-- 
John W. Linville
linville@tuxdriver.com