diff options
Diffstat (limited to 'drivers/pci/probe.c')
-rw-r--r-- | drivers/pci/probe.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index f680099c110d..93f280df3428 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -16,6 +16,7 @@ #include <linux/aer.h> #include <linux/acpi.h> #include <linux/irqdomain.h> +#include <linux/pm_runtime.h> #include "pci.h" #define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */ @@ -832,6 +833,12 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) u8 primary, secondary, subordinate; int broken = 0; + /* + * Make sure the bridge is powered on to be able to access config + * space of devices below it. + */ + pm_runtime_get_sync(&dev->dev); + pci_read_config_dword(dev, PCI_PRIMARY_BUS, &buses); primary = buses & 0xFF; secondary = (buses >> 8) & 0xFF; @@ -1012,6 +1019,8 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) out: pci_write_config_word(dev, PCI_BRIDGE_CONTROL, bctl); + pm_runtime_put(&dev->dev); + return max; } EXPORT_SYMBOL(pci_scan_bridge); @@ -2136,7 +2145,9 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, b->sysdata = sysdata; b->ops = ops; b->number = b->busn_res.start = bus; - pci_bus_assign_domain_nr(b, parent); +#ifdef CONFIG_PCI_DOMAINS_GENERIC + b->domain_nr = pci_bus_find_domain_nr(b, parent); +#endif b2 = pci_find_bus(pci_domain_nr(b), bus); if (b2) { /* If we already got to this bus through a different bridge, ignore it */ |