I have a awus036h (Alfa) wireless usb adapter, which uses the rtl8187
driver. I am trying to get it to work with a raspberry pi running
Linux 4.0.7-v7+. It sometimes works for some time, but will always
eventually crash, bringing the whole network down. I already upgraded
from 3.18, where I had the same issue. I also tested it by connecting
it to a Linux vm in VMware Fusion running Ubuntu 15.04 with kernel
3.19.0-21 and got the same Oops, so it is not a problem just confined
to the raspberry or the arm architecture.
pi@raspberrypi ~ $ uname -a
Linux raspberrypi 4.0.7-v7+ #802 SMP PREEMPT Wed Jul 8 18:01:25 BST
2015 armv7l GNU/Linux
vmware@ubuntu:~$ lsusb
Bus 001 Device 021: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187
Wireless Adapter
...
Jul 11 06:00:23 raspberrypi kernel: [ 41.746641] Internal error:
Oops: 817 [#1] PREEMPT SMP ARM
Jul 11 06:00:23 raspberrypi kernel: [ 41.753311] Modules linked in:
xt_state iptable_filter ipt_MASQUERADE nf_nat_masquerade_ipv4
iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat
nf_connt
rack ip_tables x_tables snd_bcm2835 snd_pcm snd_seq snd_seq_device
snd_timer snd arc4 rtl8187 eeprom_93cx6 mac80211 cfg80211 rfkill
8192cu uio_pdrv_genirq uio
Jul 11 06:00:23 raspberrypi kernel: [ 41.788246] CPU: 0 PID: 1563
Comm: wpa_supplicant Not tainted 4.0.7-v7+ #802
Jul 11 06:00:23 raspberrypi kernel: [ 41.797857] Hardware name: BCM2709
Jul 11 06:00:23 raspberrypi kernel: [ 41.802538] task: b8534200 ti:
b8420000 task.ti: b8420000
Jul 11 06:00:23 raspberrypi kernel: [ 41.809255] PC is at
__mutex_lock_slowpath+0xb8/0x180
Jul 11 06:00:23 raspberrypi kernel: [ 41.815624] LR is at
__mutex_lock_slowpath+0x90/0x180
Jul 11 06:00:23 raspberrypi kernel: [ 41.821967] pc : [<80549e24>]
lr : [<80549dfc>] psr: a0000013
Jul 11 06:00:23 raspberrypi kernel: [ 41.821967] sp : b8421ce8 ip :
b8421ce8 fp : b8421d1c
Jul 11 06:00:23 raspberrypi kernel: [ 41.836034] r10: 00000001 r9 :
b853f034 r8 : 00000000
Jul 11 06:00:23 raspberrypi kernel: [ 41.842516] r7 : b8534200 r6 :
ffffffff r5 : b853f030 r4 : b853f02c
Jul 11 06:00:23 raspberrypi kernel: [ 41.850299] r3 : 00000000 r2 :
b8421cec r1 : 00000000 r0 : b853f030
Jul 11 06:00:23 raspberrypi kernel: [ 41.858086] Flags: NzCv IRQs
on FIQs on Mode SVC_32 ISA ARM Segment user
Jul 11 06:00:23 raspberrypi kernel: [ 41.867723] Control: 10c5387d
Table: 3851c06a DAC: 00000015
Jul 11 06:00:23 raspberrypi kernel: [ 41.874731] Process
wpa_supplicant (pid: 1563, stack limit = 0xb8420210)
Jul 11 06:00:23 raspberrypi kernel: [ 41.883970] Stack: (0xb8421ce8
to 0xb8422000)
Jul 11 06:00:23 raspberrypi kernel: [ 41.889608] 1ce0:
b75af4c8 b853f034 00000000 b8421d00 b853f02c b75af4c8
Jul 11 06:00:23 raspberrypi kernel: [ 41.900320] 1d00: b75af000
b75af02c 00000000 b92c1200 b8421d34 b8421d20 80549f48 80549d78
Jul 11 06:00:23 raspberrypi kernel: [ 41.911022] 1d20: 7f203fb8
b853e340 b8421d94 b8421d38 7f203fec 80549ef8 b8421d94 b8421d48
Jul 11 06:00:23 raspberrypi kernel: [ 41.921726] 1d40: b8421dbc
b8421d50 7f182db8 7f182e28 b8534200 00000000 b853f02c b853e340
Jul 11 06:00:23 raspberrypi kernel: [ 41.932459] 1d60: b853f020
00000000 00000001 b853e340 b75af4c8 b75af000 b75af02c 00000000
Jul 11 06:00:23 raspberrypi kernel: [ 41.943281] 1d80: b92c1200
00000001 b8421ddc b8421d98 7f164c6c 7f203fc4 00000002 b853ee34
Jul 11 06:00:23 raspberrypi kernel: [ 41.954242] 1da0: b75af02c
00000000 b92c1200 7f16274c b8421ddc b75af4c0 7f1aa7ec 00000001
Jul 11 06:00:23 raspberrypi kernel: [ 41.965277] 1dc0: b75af02c
00000000 b92c1200 00008914 b8421df4 b8421de0 7f165bd0 7f164bd4
Jul 11 06:00:23 raspberrypi kernel: [ 41.976400] 1de0: 7f165b6c
b75af000 b8421e1c b8421df8 8047129c 7f165b78 b8421e1c b75af000
Jul 11 06:00:23 raspberrypi kernel: [ 41.987569] 1e00: b75af000
00001003 00000001 00001002 b8421e44 b8421e20 80471584 804711e0
Jul 11 06:00:23 raspberrypi kernel: [ 41.998767] 1e20: 00008914
b75af000 00000140 00001002 00000001 00000000 b8421e6c b8421e48
Jul 11 06:00:23 raspberrypi kernel: [ 42.009995] 1e40: 8047167c
804714f8 00008914 00000000 b92c120c 00000000 00000001 00000000
Jul 11 06:00:23 raspberrypi kernel: [ 42.021278] 1e60: b8421ed4
b8421e70 804dc004 80471660 00000020 00000000 b75af000 b92c120c
Jul 11 06:00:23 raspberrypi kernel: [ 42.032577] 1e80: 00000014
7eb83a3c 6e616c77 00000031 00000000 00000000 00001003 00000000
Jul 11 06:00:23 raspberrypi kernel: [ 42.043875] 1ea0: 00000000
00000000 00001002 00008914 b91dde40 7eb83a3c 80838cc0 00000006
Jul 11 06:00:23 raspberrypi kernel: [ 42.055171] 1ec0: 7eb83a3c
b964c4a0 b8421ee4 b8421ed8 804dd8f4 804db968 b8421f04 b8421ee8
Jul 11 06:00:23 raspberrypi kernel: [ 42.066467] 1ee0: 804531e0
804dd75c b91dde40 b91dde40 00000006 7eb83a3c b8421f7c b8421f08
Jul 11 06:00:23 raspberrypi kernel: [ 42.077764] 1f00: 80150f34
80453014 b8421f24 b8421f18 8015b4bc 7eb83904 b964c300 00000000
Jul 11 06:00:23 raspberrypi kernel: [ 42.089064] 1f20: 00000129
8000ed48 b8420000 00000000 b8421f94 b8421f40 80455ab4 80454b74
Jul 11 06:00:23 raspberrypi kernel: [ 42.100366] 1f40: 00000000
00000000 00000000 00000024 b8421e90 b91dde40 b91dde40 00008914
Jul 11 06:00:23 raspberrypi kernel: [ 42.111669] 1f60: 7eb83a3c
00000006 b8420000 00000000 b8421fa4 b8421f80 80151170 80150b20
Jul 11 06:00:23 raspberrypi kernel: [ 42.122971] 1f80: 00001003
000cfae8 00ad48bc 00000006 00000036 8000ed48 00000000 b8421fa8
Jul 11 06:00:23 raspberrypi kernel: [ 42.134274] 1fa0: 8000eb40
80151138 000cfae8 00ad48bc 00000006 00008914 7eb83a3c 00001003
Jul 11 06:00:23 raspberrypi kernel: [ 42.145578] 1fc0: 000cfae8
00ad48bc 00000006 00000036 00000001 000cfae8 7eb83b2c 7eb83b18
Jul 11 06:00:23 raspberrypi kernel: [ 42.156879] 1fe0: 00ad48bc
7eb83a38 00093fe8 76c81dcc 60000010 00000006 00000000 00000000
Jul 11 06:00:23 raspberrypi kernel: [ 42.168192] [<80549e24>]
(__mutex_lock_slowpath) from [<80549f48>] (mutex_lock+0x5c/0x60)
Jul 11 06:00:23 raspberrypi kernel: [ 42.179509] [<80549f48>]
(mutex_lock) from [<7f203fec>] (rtl8187_start+0x34/0x2ac8 [rtl8187])
Jul 11 06:00:23 raspberrypi kernel: [ 42.191240] [<7f203fec>]
(rtl8187_start [rtl8187]) from [<7f164c6c>]
(ieee80211_do_open+0xa4/0xfa4 [mac80211])
Jul 11 06:00:23 raspberrypi kernel: [ 42.204496] [<7f164c6c>]
(ieee80211_do_open [mac80211]) from [<7f165bd0>]
(ieee80211_open+0x64/0x68 [mac80211])
Jul 11 06:00:23 raspberrypi kernel: [ 42.217785] [<7f165bd0>]
(ieee80211_open [mac80211]) from [<8047129c>] (__dev_open+0xc8/0x140)
Jul 11 06:00:23 raspberrypi kernel: [ 42.229519] [<8047129c>]
(__dev_open) from [<80471584>] (__dev_change_flags+0x98/0x168)
Jul 11 06:00:23 raspberrypi kernel: [ 42.240637] [<80471584>]
(__dev_change_flags) from [<8047167c>] (dev_change_flags+0x28/0x58)
Jul 11 06:00:23 raspberrypi kernel: [ 42.252184] [<8047167c>]
(dev_change_flags) from [<804dc004>] (devinet_ioctl+0x6a8/0x778)
Jul 11 06:00:23 raspberrypi kernel: [ 42.263467] [<804dc004>]
(devinet_ioctl) from [<804dd8f4>] (inet_ioctl+0x1a4/0x1d0)
Jul 11 06:00:23 raspberrypi kernel: [ 42.274223] [<804dd8f4>]
(inet_ioctl) from [<804531e0>] (sock_ioctl+0x1d8/0x2a4)
Jul 11 06:00:23 raspberrypi kernel: [ 42.284716] [<804531e0>]
(sock_ioctl) from [<80150f34>] (do_vfs_ioctl+0x420/0x618)
Jul 11 06:00:23 raspberrypi kernel: [ 42.295386] [<80150f34>]
(do_vfs_ioctl) from [<80151170>] (SyS_ioctl+0x44/0x6c)
Jul 11 06:00:23 raspberrypi kernel: [ 42.305796] [<80151170>]
(SyS_ioctl) from [<8000eb40>] (ret_fast_syscall+0x0/0x54)
Jul 11 06:00:23 raspberrypi kernel: [ 42.316465] Code: e50b302c
e50b9030 e584200c e3e06000 (e5832000)
Jul 11 06:00:23 raspberrypi kernel: [ 42.324397] ---[ end trace
1a4b1708ecea66b7 ]---
Jul 11 06:00:23 raspberrypi kernel: [ 42.330670] note:
wpa_supplicant[1563] exited with preempt_count 2
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