Hi Thomas, Commit d6d5d5c4afd4c8bb4c5e3753a2141e9c3a874629 breaks boot-up on my Broadcom BCM91250A. Reverting it solves the problem. I looked at the commit but nothing obviously wrong jumped out at me. Thanks, Matt CPU 1 Unable to handle kernel paging request at virtual address 0000000000000000, epc == 0000000000000000, ra == ffffffff80173888 Oops�#1�: Cpu 1 $ 0 : 0000000000000000 0000000014001fe0 0000000000000000 ffffffff804d6e00 $ 4 : ffffffff804cce20 0000000000000000 0000000000000005 0000000000000000 $ 8 : 0000000000000000 0000000000000000 6978000000000000 0000000000000000 $12 : 0000000000000000 ffffffff80000008 ffffffff801aab00 0000000010020000 $16 : ffffffff804cce20 ffffffff804cce20 0000000000000008 ffffffff804cce9c $20 : ffffffff8059de60 0000000014001fe1 0000000000001d4c 0000000000000000 $24 : 0000000010018348 ffffffff802e9f58 $28 : a8000000ce068000 a8000000ce06bc10 0000000000000000 ffffffff80173888 Hi : 0000000000000000 Lo : 0000000000000700 epc : 0000000000000000 (null) Tainted: G W ra : ffffffff80173888 irq_shutdown+0x58/0x78 Status: 14001fe2 KX SX UX KERNEL EXL Cause : 00800008 BadVA : 0000000000000000 PrId : 03040102 (SiByte SB1) Modules linked in: Process init (pid: 1, threadinfo=a8000000ce068000, task=a8000000ce067718, tls=000000002b340400) Stack : a8000000ce5d1700 ffffffff80171c28 a8000000ce46b800 ffffffff804cce20 ffffffff8059de60 0000000000000008 a8000000ce46b810 ffffffff8059de68 0000000000001d4c ffffffff80171d78 ffffffff8059de68 a8000000ce46b800 a8000000ce468000 ffffffff802ea6c8 0000000014001fe1 a8000000ce46b878 a8000000ce46b800 a8000000ce46b878 a8000000ce46b800 ffffffff802eb7c0 a8000000ce06be50 a8000000ce06bcf8 a8000000ce06bda0 a8000000ce06be50 a8000000ce06bd80 a8000000ce06be50 0000000014001fe1 a8000000ce11d760 0000000000000000 a8000000ce468000 0000000000000000 0000000000000000 a8000000ce044f40 0000000000000008 a8000000ce11d760 a8000000cd001450 0000000000000000 ffffffff802d2c14 a8000000ce3b7000 ffffffffffffff9c ... Call Trace: �<ffffffff80171c28>� __free_irq+0xe4/0x1c8 �<ffffffff80171d78>� free_irq+0x6c/0xb4 �<ffffffff802ea6c8>� uart_shutdown+0xe4/0x120 �<ffffffff802eb7c0>� uart_close+0x224/0x334 �<ffffffff802d2c14>� tty_release+0x1dc/0x4c8 �<ffffffff801b9820>� do_filp_open+0x38/0x9c �<ffffffff801ace88>� fput+0x130/0x224 �<ffffffff801a94ec>� filp_close+0x8c/0xa4 �<ffffffff801aabb0>� SyS_close+0xb0/0x110 �<ffffffff8010e6c4>� handle_sysn32+0x44/0xa0 Code: (Bad address in epc) Disabling lock debugging due to kernel taint Kernel panic - not syncing: Attempted to kill init!