diff options
Diffstat (limited to 'src/udev/udev-builtin-net_id.c')
| -rw-r--r-- | src/udev/udev-builtin-net_id.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c index 233bdd2646..54d2ea0aaa 100644 --- a/src/udev/udev-builtin-net_id.c +++ b/src/udev/udev-builtin-net_id.c @@ -299,6 +299,10 @@ static bool is_pci_multifunction(struct udev_device *dev) { return false; } +static bool is_pci_ari_enabled(struct udev_device *dev) { + return !!udev_device_get_sysattr_value(dev, "ari_enabled"); +} + static int dev_pci_slot(struct udev_device *dev, struct netnames *names) { struct udev *udev = udev_device_get_udev(names->pcidev); unsigned domain, bus, slot, func, dev_port = 0, hotplug_slot = 0; @@ -313,6 +317,11 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) { if (sscanf(udev_device_get_sysname(names->pcidev), "%x:%x:%x.%u", &domain, &bus, &slot, &func) != 4) return -ENOENT; + if (is_pci_ari_enabled(names->pcidev)) + /* ARI devices support up to 256 functions on a single device ("slot"), and interpret the + * traditional 5-bit slot and 3-bit function number as a single 8-bit function number, + * where the slot makes up the upper 5 bits. */ + func += slot * 8; /* kernel provided port index for multiple ports on a single PCI function */ attr = udev_device_get_sysattr_value(dev, "dev_port"); |