需要用am5726与6657通过pcie进行数据交互，写了一个驱动为什么在调用pci_enable_device()函数会失败加载模块是显示
0000:01:00.0: can't enable device: BAR 0 [mem 0x00000000-0x0fffffff] not claimed
5726为RC端，6657 为EP
5726查看EP的配置空间如下：
root@am57xx-evm:/# lspci -s 01:00.0 -xxv
01:00.0 Non-VGA unclassified device: Texas Instruments Device 8888 (rev 01)
Flags: bus master, fast devsel, latency 0
Memory at <unassigned> (32-bit, non-prefetchable) [size=256M]
Memory at 70000000 (32-bit, non-prefetchable) [size=256M]
Memory at <unassigned> (32-bit, prefetchable) [size=1M]
Memory at <unassigned> (32-bit, prefetchable) [size=64K]
Memory at <unassigned> (32-bit, prefetchable) [size=4K]
Memory at <unassigned> (32-bit, prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
00: 4c 10 88 88 46 01 10 00 01 00 00 00 10 00 00 00
10: 00 00 00 00 00 00 00 70 08 00 00 00 08 00 00 00
20: 08 00 00 00 08 00 00 00 00 00 00 00 00 00 01 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 00 01 00 00
感觉bar0并没有用，不知该怎么办了，请教各位大神指点，谢谢
