PCI hotplug: Change link order of pciehp & acpiphp

Some hardware exposes PCIE slots in such a way that they can be claimed
by either the acpiphp or pciehp driver. pciehp is the preferred driver
if the firmware allows the OS to claim control via the _OSC method so
should be loaded first - if it fails to bind (either due to a missing
_OSC method or the firmware refusing to hand off control) then we can
fall back to acpiphp or a vendor-specific driver.

This patch simply changes the link order to ensure that pciehp will be
initialised before acpiphp if both are statically built into the kernel.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/hotplug/Makefile b/drivers/pci/hotplug/Makefile
index e31fb91..2aa117c 100644 (file)
--- a/drivers/pci/hotplug/Makefile
+++ b/drivers/pci/hotplug/Makefile
@@ -5,11 +5,15 @@
 obj-$(CONFIG_HOTPLUG_PCI)              += pci_hotplug.o
 obj-$(CONFIG_HOTPLUG_PCI_COMPAQ)       += cpqphp.o
 obj-$(CONFIG_HOTPLUG_PCI_IBM)          += ibmphp.o
+
+# pciehp should be linked before acpiphp in order to allow the native driver
+# to attempt to bind first. We can then fall back to generic support.
+
+obj-$(CONFIG_HOTPLUG_PCI_PCIE)         += pciehp.o
 obj-$(CONFIG_HOTPLUG_PCI_ACPI)         += acpiphp.o
 obj-$(CONFIG_HOTPLUG_PCI_ACPI_IBM)     += acpiphp_ibm.o
 obj-$(CONFIG_HOTPLUG_PCI_CPCI_ZT5550)  += cpcihp_zt5550.o
 obj-$(CONFIG_HOTPLUG_PCI_CPCI_GENERIC) += cpcihp_generic.o
-obj-$(CONFIG_HOTPLUG_PCI_PCIE)         += pciehp.o
 obj-$(CONFIG_HOTPLUG_PCI_SHPC)         += shpchp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA)          += rpaphp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR)    += rpadlpar_io.o