IB/qib: Use pci_is_root_bus() to check whether it is a root bus
Use pci_is_root_bus() instead of "if (bus->parent)" statement
for better readability.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
diff --git a/drivers/infiniband/hw/qib/qib_pcie.c b/drivers/infiniband/hw/qib/qib_pcie.c
index 3f14009..45e55ff 100644
--- a/drivers/infiniband/hw/qib/qib_pcie.c
+++ b/drivers/infiniband/hw/qib/qib_pcie.c
@@ -590,7 +590,7 @@
/* Find out supported and configured values for parent (root) */
parent = dd->pcidev->bus->self;
- if (parent->bus->parent) {
+ if (!pci_is_root_bus(parent->bus)) {
qib_devinfo(dd->pcidev, "Parent not root\n");
goto bail;
}