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Subject[PATCH 5/5] PCI MMConfig: Reserve resources but only when we're sure about them.
Put back the resource reservation as per
4c6e052adfe285ede5884e4e8c4d33af33932c13 but use it *only* when the
range(s) come from a chipset probe instead of the bios.

Signed-off-by: Olivier Galibert <galibert@pobox.com>
---
arch/i386/pci/mmconfig-shared.c | 33 +++++++++++++++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/arch/i386/pci/mmconfig-shared.c b/arch/i386/pci/mmconfig-shared.c
index 302d495..0da1e3b 100644
--- a/arch/i386/pci/mmconfig-shared.c
+++ b/arch/i386/pci/mmconfig-shared.c
@@ -159,6 +159,37 @@ static int __init pci_mmcfg_check_hostbridge(void)
return name != NULL;
}

+static __init void pci_mmcfg_insert_resources(void)
+{
+#define PCI_MMCFG_RESOURCE_NAME_LEN 19
+ int i;
+ struct resource *res;
+ char *names;
+ unsigned num_buses;
+
+ res = kcalloc(PCI_MMCFG_RESOURCE_NAME_LEN + sizeof(*res),
+ pci_mmcfg_config_num, GFP_KERNEL);
+
+ if (!res) {
+ printk(KERN_ERR "PCI: Unable to allocate MMCONFIG resources\n");
+ return;
+ }
+
+ names = (void *)&res[pci_mmcfg_config_num];
+ for (i = 0; i < pci_mmcfg_config_num; i++, res++) {
+ num_buses = pci_mmcfg_config[i].end_bus_number -
+ pci_mmcfg_config[i].start_bus_number + 1;
+ res->name = names;
+ snprintf(names, PCI_MMCFG_RESOURCE_NAME_LEN, "PCI MMCONFIG %u",
+ pci_mmcfg_config[i].pci_segment_group_number);
+ res->start = pci_mmcfg_config[i].base_address;
+ res->end = res->start + (num_buses << 20) - 1;
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+ insert_resource(&iomem_resource, res);
+ names += PCI_MMCFG_RESOURCE_NAME_LEN;
+ }
+}
+
void __init pci_mmcfg_init(int type)
{
int known_bridge = 0;
@@ -192,6 +223,8 @@ void __init pci_mmcfg_init(int type)
if (pci_mmcfg_arch_init()) {
if (type == 1)
unreachable_devices();
+ if (known_bridge)
+ pci_mmcfg_insert_resources();
pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
}
}
--
1.4.4.1.g278f
-
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