@@ -352,6 +352,19 @@ static int __init pcibios_assign_resources(void)
return 0;
}
+void pcibios_resource_survey_bus(struct pci_bus *bus)
+{
+ dev_printk(KERN_DEBUG, &bus->dev, "Allocating resources\n");
+
+ pcibios_allocate_bus_resources(bus);
+
+ pcibios_allocate_resources(bus, 0);
+ pcibios_allocate_resources(bus, 1);
+
+ if (!(pci_probe & PCI_ASSIGN_ROMS))
+ pcibios_allocate_rom_resources(bus);
+}
+
void __init pcibios_resource_survey(void)
{
struct pci_bus *bus;
@@ -154,6 +154,8 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
return ret;
}
+void __weak pcibios_resource_survey_bus(struct pci_bus *bus) { }
+
/**
* pci_bus_add_device - add a single device
* @dev: device to add
@@ -676,6 +676,7 @@ extern struct list_head pci_root_buses; /* list of all known PCI buses */
/* Some device drivers need know if pci is initiated */
extern int no_pci_devices(void);
+void pcibios_resource_survey_bus(struct pci_bus *bus);
void pcibios_fixup_bus(struct pci_bus *);
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
/* Architecture specific versions may override this (weak) */
During testing remove/rescan root bus 00, found [ 338.142574] bus: 'pci': really_probe: probing driver ata_piix with device 0000:00:01.1 [ 338.146788] ata_piix 0000:00:01.1: device not available (can't reserve [io 0x01f0-0x01f7]) [ 338.150565] ata_piix: probe of 0000:00:01.1 failed with error -22 because that fixed resource is not claimed from arch/x86/pci/i386.c::pcibios_allocate_resources() that is init path. Try to claim those resources, so on the remove/rescan will still use old resources. It is some kind honoring HW/FW setting in the registers during hot add. esp root-bus hot add is through acpi, BIOS have chance to set some register for us. -v2: add rom resource claiming. -v3: separate __init removing to another patch, also put pci_probe checking with caller from rom resource allocating Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- arch/x86/pci/i386.c | 13 +++++++++++++ drivers/pci/bus.c | 2 ++ include/linux/pci.h | 1 + 3 files changed, 16 insertions(+), 0 deletions(-)