tree 12a67c35d30ee626ca46d497c35f3a7d952034c5
parent b10ceb5530df7ee6e81f92910589a34dd3e5690b
author Yu Zhao <yu.zhao@intel.com> 1239260259 +0800
committer Jesse Barnes <jbarnes@virtuousgeek.org> 1240441181 -0700

PCI: only save/restore existent registers in the PCIe capability

PCIe 1.1 base neither requires the endpoint to implement the entire
PCIe capability structure nor specifies default values of registers
that are not implemented by the device. So we only save and restore
registers that must be implemented by different device types if the
device PCIe capability version is 1.

PCIe 1.1 Capability Structure Expansion ECN and PCIe 2.0 requires
all registers in the PCIe capability to be either implemented or
hardwired to 0. Their PCIe capability version is 2.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>