XSDR unexpected behavior when setting high sample rate in MIMO mode

[irodushka]

The case description:

1. Branch feature_pe_sync;
2. XSDR is connected via USB (PCIe wasn't tested);
3. XSDR is configured for MIMO mode;
4. Sample rate is set to some really high value - 100M, for example;
5. Open the RX stream;
6. Get an error: ERROR: [XSDR] RX: In double pump mode only SISO mode is allowed, reduce samplerate or use single channel mode! (it's OK);
7. Set sample rate to the normal value, like 4M or even 1M;
8. Error [5] still occurs when attempting to open the RX stream.

The only way I found to fix this is to reconnect the XSDR.