Problem with Marvell 8686

[杨海波]

Hi,
    I'm using Marvell 8686 with SPI interface with STM32 CPU. Use wpa_supplicant work at WPA-PSK mode. 
    When I send udp packet at about 70KBytes/s, it works unstable. It will stuck for about 30-60 seconds occasionally. When stucked, 8686 can receive data from AP, but can't send out any data. After receive a LLC packet with RNR(Receiver not ready) flag from 8686. 8686 can send data again.
    Does anyone got this problem? How can I resolve it? 

The LLC packet is: (74f06d07068b  is the mac address of 8686)
ffffffffffff 74f06d07068b 0006 0000 f581 8000

Thanks!

haibo
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