Hi,
I'm getting the following crash on every boot on OCTEON (EdgeRouter Lite)
with v4.9 (right after setting up ethernet bridging):
[ 16.814902] CPU 0 Unable to handle kernel paging request at virtual address
0000000000000080, epc == ffffffff81458570, ra == ffffffff81458804
[ 16.827805] Oops[#1]:
[ 16.830100] CPU: 0 PID: 706 Comm: ifconfig Not tainted
4.9.0-octeon-los_be07e6-00002-g29a0b7e #1
[ 16.838884] task: 800000041f9dec00 task.stack: 800000041f0d8000
[ 16.844801] $ 0 : 0000000000000000 0000000010108ce1 0000000000000000
0000000000000001
[ 16.852867] $ 4 : 800000041f98a000 800000041fb67800 0000000000000000
0000000000000002
[ 16.860932] $ 8 : 800000041fb67810 800000041f0dbb40 10434794771be290
771bf16800000001
[ 16.868997] $12 : 0000000000000000 ffffffff81383edc ffffffff81296950
0000000000000000
[ 16.877060] $16 : 800000041fb67800 800000041f98a000 ffffffff81508c48
800000041f817800
[ 16.885125] $20 : 0000000000000000 0000000000000002 0000000000000000
800000041f98a000
[ 16.893190] $24 : 0000000000000000 0000000000000000
[ 16.901256] $28 : 800000041f0d8000 800000041f0dbb10 800000041e109410
ffffffff81458804
[ 16.909321] Hi : 00000000000002c9
[ 16.912896] Lo : 0000000000001c1d
[ 16.916484] epc : ffffffff81458570 phy_attach_direct+0x38/0x1b0
[ 16.922580] ra : ffffffff81458804 phy_connect_direct+0x24/0x88
[ 16.928671] Status: 10108ce3 KX SX UX KERNEL EXL IE
[ 16.933723] Cause : 00800008 (ExcCode 02)
[ 16.937730] BadVA : 0000000000000080
[ 16.941306] PrId : 000d0601 (Cavium Octeon+)
[ 16.945660] Modules linked in: at803x
[ 16.949353] Process ifconfig (pid: 706, threadinfo=800000041f0d8000,
task=800000041f9dec00, tls=00000000771c3490)
[ 16.959605] Stack : 800000041fb67800 800000041f98a000 ffffffff81508c48
0000000000000002
[ 16.967671] 0000000000000000 0000000000000000 800000041e109400
ffffffff81458804
[ 16.975734] 800000041fb67800 800000041f98a000 ffffffff81508c48
ffffffff81504cd4
[ 16.983799] 800000041f98a000 800000041f98a000 ffffffff81509830
0000000000000000
[ 16.991864] 0000000000000000 ffffffff81508f58 0000000000000000
ffffffff815087e0
[ 16.999928] 800000041f98a000 800000041f98a048 ffffffff816fcc88
0000000000001302
[ 17.007993] 0000000000008914 ffffffff8150993c ffffffff816fcc88
0000000000001302
[ 17.016057] 800000041f98a000 ffffffff8153bc6c 800000041f98a000
0000000000000008
[ 17.024122] 8000000003c500d8 0000000000000000 800000041f98a000
0000000000000341
[ 17.032187] 0000000000001043 ffffffff8153bf94 00000000000000fe
800000041f98a000
[ 17.040251] ...
[ 17.042722] Call Trace:
[ 17.045175] [<ffffffff81458570>] phy_attach_direct+0x38/0x1b0
[ 17.050927] [<ffffffff81458804>] phy_connect_direct+0x24/0x88
[ 17.056682] [<ffffffff81504cd4>] of_phy_connect+0x54/0xb0
[ 17.062089] [<ffffffff81508f58>] cvm_oct_phy_setup_device+0x48/0xc0
[ 17.068361] [<ffffffff815087e0>] cvm_oct_common_open+0x58/0x2a8
[ 17.074285] [<ffffffff8150993c>] cvm_oct_rgmii_open+0x1c/0x90
[ 17.080040] [<ffffffff8153bc6c>] __dev_open+0x104/0x198
[ 17.085270] [<ffffffff8153bf94>] __dev_change_flags+0x94/0x180
[ 17.091107] [<ffffffff8153c0a4>] dev_change_flags+0x24/0x68
[ 17.096687] [<ffffffff815c6e30>] devinet_ioctl+0x6a8/0x8b0
[ 17.102181] [<ffffffff81516e0c>] sock_do_ioctl.constprop.14+0x24/0x68
[ 17.108626] [<ffffffff81518338>] compat_sock_ioctl+0xd18/0xfc8
[ 17.114471] [<ffffffff81296a10>] compat_SyS_ioctl+0xc0/0x1980
[ 17.120222] [<ffffffff8113109c>] syscall_common+0x18/0x3c
[ 17.125621] Code: ffb20010 dc8204b8 dcb30298 <dc420080> de640000 dc520010
12440005 00a08025 0c46e4a6
[ 17.135490]
[ 17.137147] ---[ end trace f1d7b064cedee4e4 ]---
[ 17.141882] Kernel panic - not syncing: Fatal exception
[ 17.147140] ---[ end Kernel panic - not syncing: Fatal exception
Git bisect points to:
commit ec988ad78ed6d184a7f4ca6b8e962b0e8f1de461
Author: Florian Fainelli <f.faine...@gmail.com>
Date: Tue Dec 6 20:54:43 2016 -0800
phy: Don't increment MDIO bus refcount unless it's a different owner
Reverting this patch from v4.9 fixes the issue...
A.
