tree cce5b9bdefdd2f5693fbce627e82da2522640a20
parent 4a35965345a6126955c46b4e989d02891b62087d
author Hou Zhiqiang <Zhiqiang.Hou@nxp.com> 1538987747 +0800
committer Simon Glass <sjg@chromium.org> 1542766462 -0700

dm/pci: Change the first CFG read to Vendor ID in enumeration

As the PCIe specification recommend reading the Vendor ID register
to determine if a Function is present, read the Vendor ID of a
non-existent Function must not result in system error, so we'd better
make the first CFG read to Vendor ID instead of Header Type register
in the PCIe enumeration.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>