diff options
Diffstat (limited to 'drivers/pci/host/pci-hyperv.c')
| -rw-r--r-- | drivers/pci/host/pci-hyperv.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index 3efcc7bdc5fb..ada98569b78e 100644 --- a/drivers/pci/host/pci-hyperv.c +++ b/drivers/pci/host/pci-hyperv.c @@ -130,7 +130,8 @@ union pci_version { */ union win_slot_encoding { struct { - u32 func:8; + u32 dev:5; + u32 func:3; u32 reserved:24; } bits; u32 slot; @@ -485,7 +486,8 @@ static u32 devfn_to_wslot(int devfn) union win_slot_encoding wslot; wslot.slot = 0; - wslot.bits.func = PCI_SLOT(devfn) | (PCI_FUNC(devfn) << 5); + wslot.bits.dev = PCI_SLOT(devfn); + wslot.bits.func = PCI_FUNC(devfn); return wslot.slot; } @@ -503,7 +505,7 @@ static int wslot_to_devfn(u32 wslot) union win_slot_encoding slot_no; slot_no.slot = wslot; - return PCI_DEVFN(0, slot_no.bits.func); + return PCI_DEVFN(slot_no.bits.dev, slot_no.bits.func); } /* @@ -1315,6 +1317,18 @@ static struct hv_pci_dev *new_pcichild_device(struct hv_pcibus_device *hbus, get_pcichild(hpdev, hv_pcidev_ref_initial); get_pcichild(hpdev, hv_pcidev_ref_childlist); spin_lock_irqsave(&hbus->device_list_lock, flags); + + /* + * When a device is being added to the bus, we set the PCI domain + * number to be the device serial number, which is non-zero and + * unique on the same VM. The serial numbers start with 1, and + * increase by 1 for each device. So device names including this + * can have shorter names than based on the bus instance UUID. + * Only the first device serial number is used for domain, so the + * domain number will not change after the first device is added. + */ + if (list_empty(&hbus->children)) + hbus->sysdata.domain = desc->ser; list_add_tail(&hpdev->list_entry, &hbus->children); spin_unlock_irqrestore(&hbus->device_list_lock, flags); return hpdev; |