linux-kernel - Re: [PATCH 9/9] pci: set PCI_PREF_RANGE_TYPE_64 in pci_bridge_check

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Message-ID: <20100121220910.GL17684@ldl.fc.hp.com>
Date:	Thu, 21 Jan 2010 15:09:10 -0700
From:	Alex Chiang <achiang@...com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 9/9] pci: set PCI_PREF_RANGE_TYPE_64 in
	pci_bridge_check_ranges

* Yinghai Lu <yinghai@...nel.org>:
> On 01/21/2010 01:32 PM, Alex Chiang wrote:
> >> @@ -359,8 +359,11 @@ static void pci_bridge_check_ranges(struct pci_bus *bus)
> >>  	}
> >>  	if (pmem) {
> >>  		b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH;
> >> -		if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64)
> >> +		if ((pmem & PCI_PREF_RANGE_TYPE_MASK) ==
> >> +		    PCI_PREF_RANGE_TYPE_64) {
> >>  			b_res[2].flags |= IORESOURCE_MEM_64;
> >> +			b_res[2].flags |= PCI_PREF_RANGE_TYPE_64;
> here set PCI_PREF_RANGE_TYPE_64 too.
> >> +		}
> >>  	}
> > 
> > My copy of pci_read_bridge_bases() in jbarnes's linux-next tree
> > doesn't do anything like that.
> > 
> >  284 void __devinit pci_read_bridge_bases(struct pci_bus *child)
> >  285 {
> >  ...
> >  369         if (base <= limit) {
> >  370                 res->flags = (mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) |
> >  371                                          IORESOURCE_MEM | IORESOURCE_PREFETCH;
> so it could save PCI_PREF_RANGE_TYPE_64 here.
> >  372                 if (res->flags & PCI_PREF_RANGE_TYPE_64)
> >  373                         res->flags |= IORESOURCE_MEM_64;
> >  374                 res->start = base;
> >  375                 res->end = limit + 0xfffff;
> >  376                 dev_printk(KERN_DEBUG, &dev->dev, "  bridge window %pR\n", res);
> >  377         }

Hm, ok. Thanks for pointing it out.

/ac
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