diff options
Diffstat (limited to 'sys/dev/thunderbolt/tb_pcib.c')
| -rw-r--r-- | sys/dev/thunderbolt/tb_pcib.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/sys/dev/thunderbolt/tb_pcib.c b/sys/dev/thunderbolt/tb_pcib.c index 00738984ad1c..bc4fc1ce00ec 100644 --- a/sys/dev/thunderbolt/tb_pcib.c +++ b/sys/dev/thunderbolt/tb_pcib.c @@ -557,8 +557,20 @@ static int tb_pci_probe(device_t dev) { struct tb_pcib_ident *n; + device_t parent; + devclass_t dc; - if ((n = tb_pcib_find_ident(device_get_parent(dev))) != NULL) { + /* + * This driver is only valid if the parent device is a PCI-PCI + * bridge. To determine that, check if the grandparent is a + * PCI bus. + */ + parent = device_get_parent(dev); + dc = device_get_devclass(device_get_parent(parent)); + if (strcmp(devclass_get_name(dc), "pci") != 0) + return (ENXIO); + + if ((n = tb_pcib_find_ident(parent)) != NULL) { switch (n->flags & TB_GEN_MASK) { case TB_GEN_TB1: device_set_desc(dev, "Thunderbolt 1 Link"); |