[03/21] powerpc/pci: Call pcie_bus_configure_settings()

Submitted by Benjamin Herrenschmidt on Sept. 10, 2011, 2:19 p.m.

Details

Message ID 1315664408-16797-3-git-send-email-benh@kernel.crashing.org
State Superseded
Headers show

Commit Message

Benjamin Herrenschmidt Sept. 10, 2011, 2:19 p.m.
This new function is used to properly setup the PCI Express Max Payload Size
(and in some circumstances Max Read Request Size).

Some systems will not operate properly if these aren't set correctly and
the firmware doesn't always do it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/pci-common.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

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diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 32656f1..1bd47f3 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1730,6 +1730,17 @@  void __devinit pcibios_scan_phb(struct pci_controller *hose)
 
 	if (mode == PCI_PROBE_NORMAL)
 		hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
+
+	/* Configure PCI Express settings */
+	if (bus) {
+		struct pci_bus *child;
+		list_for_each_entry(child, &bus->children, node) {
+			struct pci_dev *self = child->self;
+			if (!self)
+				continue;
+			pcie_bus_configure_settings(child, self->pcie_mpss);
+		}
+	}
 }
 
 static void fixup_hide_host_resource_fsl(struct pci_dev *dev)