On Fri, Jul 11, 2014 at 11:00 AM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: > > I explained why I think it is dangerous in the paragraph "With > 'r->flags = 0', ..." above. This a question of how the hardware > behaves, so if you think I'm wrong, you need to point out something in > the spec that says the hardware works differently than how I think it > does. If the BAR have all 0, cpu can not access it as hw will forward access to ram controller according to routing table. Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html