OOPS with 2.6.20 and 2.6.21-rc2 (mos7720)

[Dirk Schoebel]

when trying to access /dev/ttyUSB0, which is a port on a dual port
usb-serial cable (mos7720 based) an kernel OOPS happens
the driver loads ok, first access via minicom -> OOPS
(config.gz attached)


Mar  6 11:21:49 emerald Unable to handle kernel paging request at
ffff81093d0e3668 RIP:
Mar  6 11:21:49 emerald
[<ffffffff88164431>] :usbserial:serial_open+0x91/0x190
Mar  6 11:21:49 emerald PGD 8063 PUD 0
Mar  6 11:21:49 emerald Oops: 0000 [1] SMP
Mar  6 11:21:49 emerald CPU 0
Mar  6 11:21:49 emerald Modules linked in: snd_rtctimer snd_seq_midi
snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul
snd_pcm_oss snd_mixer_oss snd_seq_dummy snd_seq_oss snd_seq_midi_event
snd_seq nls_iso8859_15 vmnet(PF) vmmon(PF) rfcomm l2cap it87 hwmon_vid
i2c_isa eeprom lm90 fuse nls_iso8859_1 nls_cp850 kqemu capability dazuko
commoncap eth1394 tuner psmouse tvaudio msp3400 nvidia(P) k8temp mos7720
usbserial skge snd_bt87x forcedeth snd_emu10k1 snd_rawmidi snd_seq_device
snd_util_mem snd_hwdep bttv video_buf ir_common compat_ioctl32 btcx_risc
tveeprom videodev v4l2_common v4l1_compat ohci1394 hci_usb bluetooth zaurus
cdc_ether usbnet snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer snd
snd_page_alloc i2c_nforce2
Mar  6 11:21:49 emerald Pid: 11948, comm: minicom Tainted: PF     
2.6.21-rc2-emi #1
Mar  6 11:21:49 emerald RIP: 0010:[<ffffffff88164431>] 
[<ffffffff88164431>] :usbserial:serial_open+0x91/0x190
Mar  6 11:21:49 emerald RSP: 0018:ffff8100bbe3bda8  EFLAGS: 00010293
Mar  6 11:21:49 emerald RAX: 00000000ffffff01 RBX: 000000000bc00000 RCX:
ffff8100bd72a248
Mar  6 11:21:49 emerald RDX: 00000000000000ff RSI: ffff81010b780b80 RDI:
ffff81013d0e3ea0
Mar  6 11:21:49 emerald RBP: ffff81013d0e3e40 R08: 0000000000000000 R09:
ffff8100bd72a2a8
Mar  6 11:21:49 emerald R10: 000000000000028f R11: 0000000000000002 R12:
ffff8100bd72a000
Mar  6 11:21:49 emerald R13: 0000000000000000 R14: 00000000ffffffed R15:
ffff81010b780b80
Mar  6 11:21:49 emerald FS:  00002b80ce8e5da0(0000) GS:ffffffff808a200
(0000) knlGS:00000000f65519c0
Mar  6 11:21:49 emerald CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Mar  6 11:21:49 emerald CR2: ffff81093d0e3668 CR3: 00000000bd7c2000 CR4:
00000000000006e0
Mar  6 11:21:49 emerald Process minicom (pid: 11948, threadinfo
ffff8100bbe3a000, task ffff810109d727f0)
Mar  6 11:21:49 emerald Stack:  ffff81010a583f80 000000000bc00000
ffff81010b780b80 0000000000000000
Mar  6 11:21:49 emerald 0000000000000100 0000000000008902 ffff81013fc2d680
ffffffff805253a6
Mar  6 11:21:49 emerald ffff8100bd72a000 000000000b780b80 0000000000000000
ffff81013df58c08
Mar  6 11:21:49 emerald Call Trace:
Mar  6 11:21:49 emerald [<ffffffff805253a6>] tty_open+0x1b6/0x360
Mar  6 11:21:49 emerald [<ffffffff8024afe2>] chrdev_open+0x182/0x1e0
Mar  6 11:21:49 emerald [<ffffffff8024ae60>] chrdev_open+0x0/0x1e0
Mar  6 11:21:49 emerald [<ffffffff8021eccd>] __dentry_open+0xed/0x1e0
Mar  6 11:21:49 emerald [<ffffffff8022855d>] do_filp_open+0x2d/0x40
Mar  6 11:21:49 emerald [<ffffffff80234c6f>] do_setitimer+0x16f/0x350
Mar  6 11:21:49 emerald [<ffffffff802199ca>] do_sys_open+0x5a/0x100
Mar  6 11:21:49 emerald [<ffffffff802601ce>] system_call+0x7e/0x83
Mar  6 11:21:49 emerald
Mar  6 11:21:49 emerald
Mar  6 11:21:49 emerald Code: 48 8b 5c c5 20 48 85 db 0f 84 c2 00 00 00 4c
8d 6b 18 66 41
Mar  6 11:21:49 emerald RIP 
[<ffffffff88164431>] :usbserial:serial_open+0x91/0x190
Mar  6 11:21:49 emerald RSP <ffff8100bbe3bda8>
Mar  6 11:21:49 emerald CR2: ffff81093d0e3668

Attachment: config.gz
Description: GNU Zip compressed data