summaryrefslogtreecommitdiff
path: root/drivers/pci
diff options
context:
space:
mode:
authorMarcel Apfelbaum <marcel.a@redhat.com>2014-05-15 12:42:49 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-06-07 10:28:24 -0700
commit4d1a31078295f5aacb92bb313c6cd989f9d6742f (patch)
treec9ac916a6457f125a4cf1f50186951b5dd7f4d66 /drivers/pci
parent43d3b56b2e8c6c6ffdd988187a096e5c24cb5a8b (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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/hotplug/shpchp_ctrl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index 58499277903a..6efc2ec5e4db 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))