drm: Use list_for_each_entry() for bus traversal

Replace list_for_each() + pci_bus_b() with list_for_each_entry().

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 7f2af9aca038..309023f12d7f 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -319,7 +319,8 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
                         pci_dev_put(pci_dev);
                 }
                 if (!dev->hose) {
-                        struct pci_bus *b = pci_bus_b(pci_root_buses.next);
+                        struct pci_bus *b = list_entry(pci_root_buses.next,
+                                struct pci_bus, node);
                         if (b)
                                 dev->hose = b->sysdata;
                 }