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authorBjorn Helgaas <bhelgaas@google.com>2017-02-21 15:14:31 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-02-21 15:14:31 -0600
commit5dcda98a3b7cfc0025ca49a700765ac9ba78a6a7 (patch)
tree3715f55a4015eefdc14e61c1972d0bcc4e6babf2 /drivers/pci
parentd9520971589b008faa8df31aa2bb3d1e4f1c4534 (diff)
parent4a9b0933bdfcd85da840284bf5a0eb17b654b9c2 (diff)
downloadlinux-5dcda98a3b7cfc0025ca49a700765ac9ba78a6a7.tar.bz2
Merge branch 'pci/host-hv' into next
* pci/host-hv: PCI: hv: Use device serial number as PCI domain PCI: hv: Fix wslot_to_devfn() to fix warnings on device removal
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/host/pci-hyperv.c20
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;