diff options
| author | Marcel Apfelbaum <marcel.a@redhat.com> | 2014-05-15 12:42:49 -0600 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-06-09 15:53:43 +0200 |
| commit | 61139eac3782bc1ef03dc4302e69664053fddecf (patch) | |
| tree | bfd3c7fd8967b4f26c2f0d906ef7f7759b1229e3 | |
| parent | 080908ff363f552a817ae6f9f34d701d28799117 (diff) | |
PCI: shpchp: Check bridge's secondary (not primary) bus speed
commit 93fa9d32670f5592c8e56abc9928fc194e1e72fc upstream.
When a new device is added below a hotplug bridge, the bridge's secondary
bus speed and the device's bus speed must match. The shpchp driver
previously checked the bridge's *primary* bus speed, not the secondary bus
speed.
This caused hot-add errors like:
shpchp 0000:00:03.0: Speed of bus ff and adapter 0 mismatch
Check the secondary bus speed instead.
[bhelgaas: changelog]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=75251
Fixes: 3749c51ac6c1 ("PCI: Make current and maximum bus speeds part of the PCI core")
Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
| -rw-r--r-- | drivers/pci/hotplug/shpchp_ctrl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c index 58499277903..6efc2ec5e4d 100644 --- a/drivers/pci/hotplug/shpchp_ctrl.c +++ b/drivers/pci/hotplug/shpchp_ctrl.c @@ -282,8 +282,8 @@ static int board_added(struct slot *p_slot) return WRONG_BUS_FREQUENCY; } - bsp = ctrl->pci_dev->bus->cur_bus_speed; - msp = ctrl->pci_dev->bus->max_bus_speed; + bsp = ctrl->pci_dev->subordinate->cur_bus_speed; + msp = ctrl->pci_dev->subordinate->max_bus_speed; /* Check if there are other slots or devices on the same bus */ if (!list_empty(&ctrl->pci_dev->subordinate->devices)) |