[PATCH 3/6] IB/qib: Use pci_is_root_bus() to check whether it is a root bus

[Yijing Wang]

Use pci_is_root_bus() instead of "if (bus->parent)" statement
for better readability.

Signed-off-by: Yijing Wang <wangyij...@huawei.com>
---
 drivers/infiniband/hw/qib/qib_pcie.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/qib/qib_pcie.c 
b/drivers/infiniband/hw/qib/qib_pcie.c
index c574ec7..3a5b99b 100644
--- a/drivers/infiniband/hw/qib/qib_pcie.c
+++ b/drivers/infiniband/hw/qib/qib_pcie.c
@@ -590,7 +590,7 @@ static int qib_tune_pcie_caps(struct qib_devdata *dd)
 
        /* 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;
        }
-- 
1.7.1


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