Comment 5 for bug 1448567

I also have the same issue with Macbook Pro early 2015:

 $ lspci -vvnn | grep -A 9 Network [17:15:14]
03:00.0 Network controller [0280]: Broadcom Corporation Device [14e4:43ba] (rev 01)
 Subsystem: Apple Inc. Device [106b:0133]
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 256 bytes
 Interrupt: pin A routed to IRQ 64
 Region 0: Memory at c1400000 (64-bit, non-prefetchable) [size=32K]
 Region 2: Memory at c1000000 (64-bit, non-prefetchable) [size=4M]
 Capabilities: <access denied>
 Kernel driver in use: brcmfmac