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| author | Marcel Apfelbaum <marcel.a@redhat.com> | 2014-05-15 12:42:49 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-07 13:25:38 -0700 |
| commit | d0e845f6565ceed9ff36b95ac68cf705b97a5844 (patch) | |
| tree | 26ecb8f0c58b16a6226c9c60b24789610f5d2051 | |
| parent | 55d9b08514ede9334e443337e9bf6181a3f8b114 (diff) | |
| download | linux-3.10-d0e845f6565ceed9ff36b95ac68cf705b97a5844.tar.gz linux-3.10-d0e845f6565ceed9ff36b95ac68cf705b97a5844.tar.bz2 linux-3.10-d0e845f6565ceed9ff36b95ac68cf705b97a5844.zip | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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)) |