The infiniband adapter might be connected to a PCI hotplug slot. Performing secondary bus reset on a hotplug slot causes PCI link up/down interrupts. Hotplug driver removes the device from system when a link down interrupt is observed and performs re-enumeration when link up interrupt is observed. This conflicts with what this code is trying to do. Try secondary bus reset only if pci_reset_slot() fails/unsupported. Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx> --- drivers/infiniband/hw/hfi1/pcie.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c index 83d66e8..75f49e3 100644 --- a/drivers/infiniband/hw/hfi1/pcie.c +++ b/drivers/infiniband/hw/hfi1/pcie.c @@ -908,7 +908,8 @@ static int trigger_sbr(struct hfi1_devdata *dd) * delay after a reset is required. Per spec requirements, * the link is either working or not after that point. */ - pci_reset_bridge_secondary_bus(dev->bus->self); + if (pci_reset_slot(dev->slot)) + pci_reset_bridge_secondary_bus(dev->bus->self); return 0; } -- 2.7.4
