When PCI BUS is added, PCI_BUS domain ID is set. When PCI_BUS and a device
added to the bus is racing against each other, the first device tends to
overwrite the domain ID. In order to avoid the race, this patch make sure
when a device is added to a bus, it never updated the bus domain ID. Since
we have the transparent SRIOV mode now, the short VF device name is no
longer needed.
Fixes: 4a9b0933bdfc("PCI:hv:Use device serial number as PCI domain")
Cc: sta...@vger.kernel.org
Signed-off-by: Sridhar Pitchai <srpit...@microsoft.com>
---
drivers/pci/host/pci-hyperv.c | 11 -----------
1 file changed, 11 deletions(-)
diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
index 2faf38e..ac67e56 100644
--- a/drivers/pci/host/pci-hyperv.c
+++ b/drivers/pci/host/pci-hyperv.c
@@ -1518,17 +1518,6 @@ static struct hv_pci_dev *new_pcichild_device(struct
hv_pcibus_device *hbus,
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;
--
2.7.4
