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Linux/AM5728: PCIe problem

Part Number: AM5728

Tool/software: Linux

Hello All,

we use pex8609 switch to extend 4 pcie ports in downstream ,when we inserting one ath9k wirless card in a downstream port ,the card works properly and the speed is fast,but when we inserting two ath9k wirless cards,the speed is very slow and the delay of ping is more than 1000ms.

how to config am5728's pcie controler to make the two wirless card work properly in the same time?

Help me with this.

Thanks,

Jay