linux-kernel - [PATCH 24/36] PCI: Only treat non-pef mmio64 as pref if host-bridge has

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Date:	Mon,  6 Jul 2015 16:39:14 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	David Miller <davem@...emloft.net>,
	David Ahern <david.ahern@...cle.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Wei Yang <weiyang@...ux.vnet.ibm.com>, TJ <linux@....tj>,
	Yijing Wang <wangyijing@...wei.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 24/36] PCI: Only treat non-pef mmio64 as pref if host-bridge has_mem64

If host bridge does not have mmio64 above 4G, We don't need to
treat device non-pref mmio64 as as pref mmio64.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 drivers/pci/setup-bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index ab7bafe..e8e9029 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1010,7 +1010,7 @@ int pci_claim_bridge_resource(struct pci_dev *bridge, int i)
 static bool pci_up_path_over_pref_mem64(struct pci_bus *bus)
 {
 	if (pci_is_root_bus(bus))
-		return true;
+		return to_pci_host_bridge(bus->bridge)->has_mem64;
 
 	if (bus->self && !(bus->self->resource[PCI_BRIDGE_RESOURCES + 2].flags &
 			   IORESOURCE_MEM_64))
-- 
1.8.4.5

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