[U-Boot] [RESPIN PATCH v3 1/4] dm: pci: Optimize pci_uclass_post_bind()

[Bin Meng]

If there is no pci device listed in the device tree,
don't bother scanning the device tree.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>

---
Simon, I see the following v2 patches were applied, but don't see
you replied the patch thread to mention it's been applied.
 - x86: fsp: Call fsp_init_phase_pci() in pci_uclass_post_probe()
 - fdtdec: Fix possible infinite loop in fdtdec_get_pci_vendev()
 - dm: pci: Save devfn without bus number in pci_uclass_child_post_bind()

I assume these patches look good, so I don't include those patches
in the v3 series. Let me know if there is any issue.

Changes in v3 respin:
- Fix typo of 'tree'

Changes in v3:
- Rebase on u-boot-x86/master
- Drop v2 patches which were already applied

 drivers/pci/pci-uclass.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 2d12344..b25298f 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -632,6 +632,13 @@ error:
 static int pci_uclass_post_bind(struct udevice *bus)
 {
 	/*
+	 * If there is no pci device listed in the device tree,
+	 * don't bother scanning the device tree.
+	 */
+	if (bus->of_offset == -1)
+		return 0;
+
+	/*
 	 * Scan the device tree for devices. This does not probe the PCI bus,
 	 * as this is not permitted while binding. It just finds devices
 	 * mentioned in the device tree.
-- 
1.8.2.1