===================================================================
@@ -217,13 +217,14 @@ static void __assign_resources_sorted(st
}
static void pdev_assign_resources_sorted(struct pci_dev *dev,
+ struct resource_list_x *add_head,
struct resource_list_x *fail_head)
{
struct resource_list head;
head.next = NULL;
__dev_sort_resources(dev, &head);
- __assign_resources_sorted(&head, NULL, fail_head);
+ __assign_resources_sorted(&head, add_head, fail_head);
}
@@ -852,17 +853,19 @@ void __ref pci_bus_assign_resources(cons
EXPORT_SYMBOL(pci_bus_assign_resources);
static void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge,
+ struct resource_list_x *add_head,
struct resource_list_x *fail_head)
{
struct pci_bus *b;
- pdev_assign_resources_sorted((struct pci_dev *)bridge, fail_head);
+ pdev_assign_resources_sorted((struct pci_dev *)bridge,
+ add_head, fail_head);
b = bridge->subordinate;
if (!b)
return;
- __pci_bus_assign_resources(b, NULL, fail_head);
+ __pci_bus_assign_resources(b, add_head, fail_head);
switch (bridge->class >> 8) {
case PCI_CLASS_BRIDGE_PCI:
@@ -1129,6 +1132,8 @@ enable_and_dump:
void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge)
{
struct pci_bus *parent = bridge->subordinate;
+ struct resource_list_x add_list; /* list of resources that
+ want additional resources */
int tried_times = 0;
struct resource_list_x head, *list;
int retval;
@@ -1136,11 +1141,12 @@ void pci_assign_unassigned_bridge_resour
IORESOURCE_PREFETCH;
head.next = NULL;
+ add_list.next = NULL;
again:
- pci_bus_size_bridges(parent);
- __pci_bridge_assign_resources(bridge, &head);
-
+ __pci_bus_size_bridges(parent, &add_list);
+ __pci_bridge_assign_resources(bridge, &add_list, &head);
+ BUG_ON(add_list.next);
tried_times++;
if (!head.next)
During pci remove/rescan testing found: [ 541.141614] pci 0000:c0:03.0: PCI bridge to [bus c4-c9] [ 541.141965] pci 0000:c0:03.0: bridge window [io 0x1000-0x0fff] [ 541.159181] pci 0000:c0:03.0: bridge window [mem 0xf0000000-0xf00fffff] [ 541.159540] pci 0000:c0:03.0: bridge window [mem 0xfc180000000-0xfc197ffffff 64bit pref] [ 541.179374] pci 0000:c0:03.0: device not available (can't reserve [io 0x1000-0x0fff]) [ 541.199198] pci 0000:c0:03.0: Error enabling bridge (-22), continuing [ 541.199202] pci 0000:c0:03.0: enabling bus mastering [ 541.199209] pci 0000:c0:03.0: setting latency timer to 64 [ 541.199917] pcieport 0000:c0:03.0: device not available (can't reserve [io 0x1000-0x0fff]) [ 541.199963] pcieport: probe of 0000:c0:03.0 failed with error -22 This bug was uncovered by commit | commit c8adf9a3e873eddaaec11ac410a99ef6b9656938 | Author: Ram Pai <linuxram@us.ibm.com> | Date: Mon Feb 14 17:43:20 2011 -0800 | | PCI: pre-allocate additional resources to devices only after successful allo cation of essential resources. After that commit, pci_hotplug_io_size is changed to additional_io_size from minium size. So it will not get into failed list, and will not be reset there. It turns out we need to add_head for those calling. So those resource get reset properly. after patch, will get right result: [ 621.206655] pci 0000:c0:03.0: PCI bridge to [bus c4-c9] [ 621.206912] pci 0000:c0:03.0: bridge window [io disabled] [ 621.226594] pci 0000:c0:03.0: bridge window [mem 0xf0000000-0xf00fffff] [ 621.226904] pci 0000:c0:03.0: bridge window [mem 0xfc180000000-0xfc197ffffff 64bit pref] [ 621.247012] pci 0000:c0:03.0: enabling bus mastering [ 621.247275] pci 0000:c0:03.0: setting latency timer to 64 [ 621.267656] pcieport 0000:c0:03.0: setting latency timer to 64 [ 621.268134] pcieport 0000:c0:03.0: irq 160 for MSI/MSI-X [ 621.286832] pcieport 0000:c0:03.0: Signaling PME through PCIe PME interrupt [ 621.306360] pci 0000:c4:00.0: Signaling PME through PCIe PME interrupt [ 621.306684] pcie_pme 0000:c0:03.0:pcie01: service driver pcie_pme loaded [ 621.326512] aer 0000:c0:03.0:pcie02: service driver aer loaded [ 621.326911] pciehp 0000:c0:03.0:pcie04: Hotplug Controller: We also need this patch when pluging in hotplug chassis without cards. -v2: update a little bit descriptions. Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- drivers/pci/setup-bus.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html