[PATCH 4.2 023/110] [media] rtl28xxu: fix control message flaws

4.2-stable review patch. If anyone has any objections, please let me know. -- From: Antti Palosaari commit d18ca5b7ceca0e9674cb4bb2ed476b0fcbb23ba2 upstream. Add lock to prevent concurrent access for control message as control message function uses shared buffer. Without the

[PATCH 4.2 023/110] [media] rtl28xxu: fix control message flaws

4.2-stable review patch. If anyone has any objections, please let me know. -- From: Antti Palosaari commit d18ca5b7ceca0e9674cb4bb2ed476b0fcbb23ba2 upstream. Add lock to prevent concurrent access for control message as control message function uses shared