PCI: pcie: Ensure hotplug ports have a minimum number of resources
In general a BIOS may goof or we may hotplug in a hotplug controller.
In either case the kernel needs to reserve resources for plugging
in more devices in the future instead of creating a minimal resource
assignment.
We already do this for cardbus bridges I am just adding a variant
for pcie bridges.
v2: Make testing for pcie hotplug bridges based on a flag.
So far we only set the flag for pcie but a header_quirk
could easily be added for the non-standard pci hotplug
bridges.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/include/linux/pci.h b/include/linux/pci.h
index d756683..d80ed87 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -278,6 +278,7 @@
unsigned int is_physfn:1;
unsigned int is_virtfn:1;
unsigned int reset_fn:1;
+ unsigned int is_hotplug_bridge:1;
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */
@@ -1245,6 +1246,9 @@
extern unsigned long pci_cardbus_io_size;
extern unsigned long pci_cardbus_mem_size;
+extern unsigned long pci_hotplug_io_size;
+extern unsigned long pci_hotplug_mem_size;
+
int pcibios_add_platform_entries(struct pci_dev *dev);
void pcibios_disable_device(struct pci_dev *dev);
int pcibios_set_pcie_reset_state(struct pci_dev *dev,