[REGRESSION] v5.0-rc5 rtl8192cu breakage

[Vito Caputo]

Never seen this before v5.0-rc5, rc5 is the only v5.0 build I've booted
so far, if this is already fixed in a newer rc please let me know.

Just wanted to give a heads up since we're so close to v5.0:

WiFi stopped functioning abruptly, this appeared in dmesg:

[968853.940102] usb 2-1: USB disconnect, device number 2
[968853.949169] wlan3: deauthenticating from 0c:72:d9:27:17:57 by local choice (Reason: 3=DEAUTH_LEAVING)
[968853.949537] rtl_usb: reg 0x102, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x6954341e
[968853.949552] rtl_usb: reg 0x422, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x8531114
[968853.949564] rtl_usb: reg 0x542, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x34085e
[968853.949583] rtl_usb: reg 0x1cc, usbctrl_vendorreq TimeOut! status:0xffffffed value=0x2e
[968854.204153] usb 2-1: new high-speed USB device number 4 using ehci-pci
[968854.335901] usb 2-1: New USB device found, idVendor=7392, idProduct=7811, bcdDevice= 2.00
[968854.335910] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[968854.335916] usb 2-1: Product: 802.11n WLAN Adapter
[968854.335921] usb 2-1: Manufacturer: Realtek
[968854.335926] usb 2-1: SerialNumber: 00e04c000001
[968854.340632] rtl8192cu: Chip version 0x10
[968854.431999] rtl8192cu: Board Type 0
[968854.432614] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
[968854.432723] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[968854.433043] ieee80211 phy1: Selected rate control algorithm 'rtl_rc'
[968854.488906] rtl8192cu 2-1:1.0 wlan3: renamed from wlan0
[968854.507120] rtl8192cu: MAC auto ON okay!
[968854.548252] rtl8192cu: Tx queue select: 0x05
[968855.298268] rtl8192c_common: Polling FW ready fail! REG_MCUFWDL:0x00030006.
[968855.298274] rtl8192c_common: Firmware is not ready to run!

Unplugging the USB WiFi dongle and reinserting got everything back up and
working.  Only experienced this once so far and it took ~10 days to
happen, only just started using v5.0 so not much more information at
this time.

No reproducer at this time, I wasn't doing anything in particular.

Regards,
Vito Caputo