Hallo Markus!
I'm using a Pinnacle PCTV DVB-T for several months now without serious problems.
So far I used it only with my Notebook. Now I set up a Mini-ITX Machine with
MythTV running 24/24h.
The machine freezes ~36h ... black screen, even no sysrq. (Debian etch
2.6.18-4-k7).
So I setup kexec, kernel 2.6.21, v4l 5877:e9a7be188b2b and now I got a
backtrace:
<1>[16645.528000] BUG: unable to handle kernel NULL pointer dereference at
virtual address 0
0000068
[...]
[16645.528000] EIP is at end_unlink_async+0x1b/0xc5 [ehci_hcd]
[16645.528000] eax: 00000060 ebx: de4f20dc ecx: df912020 edx: df8f0b57
[16645.528000] esi: 00000000 edi: de4f20dc ebp: c58a9d4c esp: c58a9d40
[16645.528000] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
[16645.528000] Process mythbackend (pid: 12863, ti=c58a8000 task=dbb3d070
task.ti=c58a8000)
[16645.528000] Stack: 00000020 00000000 de4f20dc c58a9dbc df8ed7d6 d74ba800
de4f20dc de4f20d
c
[16645.528000] dd9bd080 c58a9d78 df8ed22a de4f20dc 00000000 de4f20dc
c58a9de8 df8ed7d
6
[16645.528000] 000000bc c58a9d9c 00000292 00000000 00000000 c56ce254
de4f20dc 0000000
0
[16645.528000] Call Trace:
[16645.528000] [<c0104a3e>] show_trace_log_lvl+0x1a/0x2f
[16645.528000] [<c0104aee>] show_stack_log_lvl+0x9b/0xa3
[16645.528000] [<c0104cac>] show_registers+0x1b6/0x288
[16645.528000] [<c0104e68>] die+0xea/0x1bd
[16645.528000] [<c0113bcf>] do_page_fault+0x435/0x506
[16645.528000] [<c0289cbc>] error_code+0x74/0x7c
[16645.528000] [<df8ed7d6>] ehci_work+0x22/0x64b [ehci_hcd]
[16645.528000] [<df8f21b5>] ehci_irq+0x234/0x254 [ehci_hcd]
[16645.528000] [<df8a83af>] usb_hcd_irq+0x24/0x51 [usbcore]
[16645.528000] [<c013b3e2>] handle_IRQ_event+0x21/0x48
[16645.528000] [<c013c515>] handle_level_irq+0x5f/0x96
[16645.528000] [<c0105f8a>] do_IRQ+0x5c/0x7a
[16645.528000] [<c010453f>] common_interrupt+0x23/0x28
[16645.528000] [<c0140892>] free_hot_page+0xa/0xc
[16645.528000] [<c01408ae>] __free_pages+0x1a/0x25
[16645.528000] [<c014c0bc>] __vunmap+0xa2/0xcb
[16645.528000] [<c014c16f>] vfree+0x25/0x27
[16645.528000] [<dfb1e77b>] dvb_dvr_release+0x5b/0xb4 [dvb_core]
[16645.528000] [<c0155973>] __fput+0xa9/0x153
[16645.528000] [<c0155a33>] fput+0x16/0x18
[16645.528000] [<c01535cf>] filp_close+0x54/0x5c
[16645.528000] [<c0154597>] sys_close+0x57/0x8d
[16645.528000] [<c0103b30>] sysenter_past_esp+0x5d/0x81
[16645.528000] =======================
[16645.528000] Code: e0 89 f8 e8 4c 4c 86 e0 83 c4 2c 5b 5e 5f c9 c3 55 89 e5
57 56 53 89 c3
8b 70 14 0f ba b0 bc 00 00 00 01 8d 46 60 ba 57 0b 8f df <c6> 46 68 03 c7 46
48 00 00 00 00
e8 21 8d 8c e0 8b 7e 58 80 63
[16645.528000] EIP: [<df8ed1da>] end_unlink_async+0x1b/0xc5 [ehci_hcd]
Actually I'm not sure if it is irq gotcha of the ITX mainboard because it seems
to
have general timing problems. However, while crashing it passed the dvb code
...
I'm not sure if it crashed above or below the TODO :)
crash> l *dvb_dvr_release+0x5b
0xdfb1e77b is in dvb_dvr_release (/home/chris/Soft/v4l-5877/v4l/dmxdev.c:211).
206 spin_unlock_irq(&dmxdev->lock);
207 vfree(mem);
208 }
209 }
210 /* TODO */
211 dvbdev->users--;
212 if(dvbdev->users==-1 && dmxdev->exit==1) {
213 fops_put(file->f_op);
214 file->f_op = NULL;
215 mutex_unlock(&dmxdev->mutex);
What do you think about that? Whats TODO?
I attached some more information of the debugging session.
regards
chris
lsusb
Bus 002 Device 002: ID 051d:0002 American Power Conversion Back-UPS Pro
500/1000/1500
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 003: ID 086c:1003 DeTeWe - Deutsche Telephonwerke AG & Co. TA33
ISDN TA
Bus 001 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 004 Device 005: ID 05e3:0702 Genesys Logic, Inc. USB 2.0 IDE Adapter
Bus 004 Device 004: ID eb1a:2870 eMPIA Technology, Inc.
Bus 004 Device 001: ID 0000:0000
uptime
19:00:53 up 2:56, 4 users, load average: 0.02, 0.04, 0.03
cat /proc/interrupts
CPU0
0: 53 XT-PIC-XT timer
1: 8 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
5: 0 XT-PIC-XT SiS SI7012
6: 2 XT-PIC-XT floppy
7: 1577871 XT-PIC-XT ehci_hcd:usb4
8: 1 XT-PIC-XT rtc
9: 1 XT-PIC-XT acpi, ohci_hcd:usb3
10: 8134 XT-PIC-XT ohci_hcd:usb1, eth0, eth1
11: 938551 XT-PIC-XT libata, ohci_hcd:usb2, wifi0
12: 124 XT-PIC-XT i8042
14: 31669 XT-PIC-XT libata
15: 0 XT-PIC-XT libata
NMI: 1055
LOC: 1577802
ERR: 367
MIS: 0
<1>[16645.528000] BUG: unable to handle kernel NULL pointer dereference at
virtual address 0
0000068
[16645.528000] printing eip:
[16645.528000] df8ed1da
[16645.528000] *pde = 00000000
[16645.528000] Oops: 0002 [#1]
[16645.528000] Modules linked in: wlan_ccmp button ac battery act_police
sch_ingress cls_u32
sch_sfq sch_htb wlan_tkip wlan_xauth wlan_scan_ap ipt_REJECT xt_multiport
ipt_LOG xt_limit
xt_tcpudp ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 xt_state ip6_tables
iptable_filter ip
_tables x_tables cpufreq_stats cpufreq_userspace powernow_k7 it87 hwmon_vid
i2c_isa nf_nat_f
tp nf_nat nf_conntrack_ftp nf_conntrack nfnetlink loop usbhid hid qt1010 mt2060
xc3028_tuner
firmware_class mt352 zl10353 tuner em2880_dvb dvb_core tvp5150 usb_storage
em28xx compat_io
ctl32 ir_common videodev v4l2_common v4l1_compat tveeprom i2c_core tsdev
snd_intel8x0 snd_ac
97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd floppy
soundcore psmouse a
th_rate_sample rtc sis900 sis_agp snd_page_alloc pcspkr serio_raw ath_pci wlan
ath_hal(P) r8
169 mii agpgart ehci_hcd ohci_hcd shpchp pci_hotplug usbcore evdev thermal
processor fan ata
_generic generic sis5513 ide_core sata_sis pata_sis libata sd_mod scsi_mod
dm_snapshot dm_mi
rror dm_mod ext3 jbd mbcache
[16645.528000] CPU: 0
[16645.528000] EIP: 0060:[<df8ed1da>] Tainted: P VLI
[16645.528000] EFLAGS: 00010202 (2.6.21crash #3)
[16645.528000] EIP is at end_unlink_async+0x1b/0xc5 [ehci_hcd]
[16645.528000] eax: 00000060 ebx: de4f20dc ecx: df912020 edx: df8f0b57
[16645.528000] esi: 00000000 edi: de4f20dc ebp: c58a9d4c esp: c58a9d40
[16645.528000] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
[16645.528000] Process mythbackend (pid: 12863, ti=c58a8000 task=dbb3d070
task.ti=c58a8000)
[16645.528000] Stack: 00000020 00000000 de4f20dc c58a9dbc df8ed7d6 d74ba800
de4f20dc de4f20d
c
[16645.528000] dd9bd080 c58a9d78 df8ed22a de4f20dc 00000000 de4f20dc
c58a9de8 df8ed7d
6
[16645.528000] 000000bc c58a9d9c 00000292 00000000 00000000 c56ce254
de4f20dc 0000000
0
[16645.528000] Call Trace:
[16645.528000] [<c0104a3e>] show_trace_log_lvl+0x1a/0x2f
[16645.528000] [<c0104aee>] show_stack_log_lvl+0x9b/0xa3
[16645.528000] [<c0104cac>] show_registers+0x1b6/0x288
[16645.528000] [<c0104e68>] die+0xea/0x1bd
[16645.528000] [<c0113bcf>] do_page_fault+0x435/0x506
[16645.528000] [<c0289cbc>] error_code+0x74/0x7c
[16645.528000] [<df8ed7d6>] ehci_work+0x22/0x64b [ehci_hcd]
[16645.528000] [<df8f21b5>] ehci_irq+0x234/0x254 [ehci_hcd]
[16645.528000] [<df8a83af>] usb_hcd_irq+0x24/0x51 [usbcore]
[16645.528000] [<c013b3e2>] handle_IRQ_event+0x21/0x48
[16645.528000] [<c013c515>] handle_level_irq+0x5f/0x96
[16645.528000] [<c0105f8a>] do_IRQ+0x5c/0x7a
[16645.528000] [<c010453f>] common_interrupt+0x23/0x28
[16645.528000] [<c0140892>] free_hot_page+0xa/0xc
[16645.528000] [<c01408ae>] __free_pages+0x1a/0x25
[16645.528000] [<c014c0bc>] __vunmap+0xa2/0xcb
[16645.528000] [<c014c16f>] vfree+0x25/0x27
[16645.528000] [<dfb1e77b>] dvb_dvr_release+0x5b/0xb4 [dvb_core]
[16645.528000] [<c0155973>] __fput+0xa9/0x153
[16645.528000] [<c0155a33>] fput+0x16/0x18
[16645.528000] [<c01535cf>] filp_close+0x54/0x5c
[16645.528000] [<c0154597>] sys_close+0x57/0x8d
[16645.528000] [<c0103b30>] sysenter_past_esp+0x5d/0x81
[16645.528000] =======================
[16645.528000] Code: e0 89 f8 e8 4c 4c 86 e0 83 c4 2c 5b 5e 5f c9 c3 55 89 e5
57 56 53 89 c3
8b 70 14 0f ba b0 bc 00 00 00 01 8d 46 60 ba 57 0b 8f df <c6> 46 68 03 c7 46
48 00 00 00 00
e8 21 8d 8c e0 8b 7e 58 80 63
[16645.528000] EIP: [<df8ed1da>] end_unlink_async+0x1b/0xc5 [ehci_hcd] SS:ESP
0068:c58a9d40
Value=0x0336 wIndex=0x0000 wLength=2
crash> l *end_unlink_async+0x1b
0xdf8ed1da is in end_unlink_async (ehci-q.c:974).
969 struct ehci_qh *next;
970
971 timer_action_done (ehci, TIMER_IAA_WATCHDOG);
972
973 // qh->hw_next = cpu_to_le32 (qh->qh_dma);
974 qh->qh_state = QH_STATE_IDLE;
975 qh->qh_next.qh = NULL;
976 qh_put (qh); // refcount from reclaim
977
978 /* other unlink(s) may be pending (in QH_STATE_UNLINK_WAIT) */
crash> l *ehci_work+0x22
0xdf8ed7d6 is in ehci_work (drivers/usb/host/ehci-hcd.c:370).
360 static void ehci_work (struct ehci_hcd *ehci)
361 {
362 timer_action_done (ehci, TIMER_IO_WATCHDOG);
363 if (ehci->reclaim_ready)
364 end_unlink_async (ehci);
365
366 /* another CPU may drop ehci->lock during a schedule scan while
367 * it reports urb completions. this flag guards against bogus
368 * attempts at re-entrant schedule scanning.
369 */
370 if (ehci->scanning)
371 return;
372 ehci->scanning = 1;
crash> l *dvb_dvr_release+0x5b
0xdfb1e77b is in dvb_dvr_release (/home/chris/Soft/v4l-5877/v4l/dmxdev.c:211).
206 spin_unlock_irq(&dmxdev->lock);
207 vfree(mem);
208 }
209 }
210 /* TODO */
211 dvbdev->users--;
212 if(dvbdev->users==-1 && dmxdev->exit==1) {
213 fops_put(file->f_op);
214 file->f_op = NULL;
215 mutex_unlock(&dmxdev->mutex);
crash> bt -t
PID: 12863 TASK: dbb3d070 CPU: 0 COMMAND: "mythbackend"
START: crash_kexec at c01372cc
[c58a9c3c] qh_destroy at df8f0b57
[c58a9c60] end_unlink_async at df8ed1da
[c58a9c80] die at c0104ef6
[c58a9cc0] do_page_fault at c0113bcf
[c58a9cfc] do_page_fault at c011379a
[c58a9d04] error_code at c0289cbc
[c58a9d10] qh_destroy at df8f0b57
[c58a9d34] end_unlink_async at df8ed1da
[c58a9d50] ehci_work at df8ed7d6
[c58a9d68] end_unlink_async at df8ed22a
[c58a9d7c] ehci_work at df8ed7d6
[c58a9dc0] ehci_irq at df8f21b5
[c58a9dec] ehci_irq at df8f21b5
[c58a9e18] copy_from_user at c01b91a6
[c58a9e2c] core_sys_select at c015f4ad
[c58a9e4c] usb_hcd_irq at df8a83af
[c58a9e58] handle_IRQ_event at c013b3e2
[c58a9e70] handle_level_irq at c013c515
[c58a9e80] do_IRQ at c0105f8a
[c58a9e84] handle_IRQ_event at c013b3e2
[c58a9ea4] common_interrupt at c010453f
[c58a9ed4] free_hot_cold_page at c0140853
[c58a9f00] free_hot_page at c0140892
[c58a9f08] __free_pages at c01408ae
[c58a9f10] __vunmap at c014c0bc
[c58a9f34] vfree at c014c16f
[c58a9f3c] dvb_dvr_release at dfb1e77b
[c58a9f58] __fput at c0155973
[c58a9f80] fput at c0155a33
[c58a9f88] filp_close at c01535cf
[c58a9fa0] sys_close at c0154597
[c58a9fb4] sysenter_past_esp at c0103b30
crash> bt -f
PID: 12863 TASK: dbb3d070 CPU: 0 COMMAND: "mythbackend"
#0 [c58a9c34] crash_kexec at c01372cc
[RA: c0104ef6 SP: c58a9c34 FP: c58a9c80 SIZE: 80]
c58a9c34: de4f20dc df912020 df8f0b57 00000000
c58a9c44: de4f20dc c58a9d4c 00000060 0000007b
c58a9c54: 0000007b 000000d8 ffffffff df8ed1da
c58a9c64: 00000060 00010202 c58a9d40 00000068
c58a9c74: c58a9d40 00000202 c58a9cbc c0104ef6
#1 [c58a9c80] die at c0104ef1
[RA: c0113bcf SP: c58a9c84 FP: c58a9cc0 SIZE: 64]
c58a9c84: c02c45e9 00000068 c58a9d40 00000001
c58a9c94: c02c986a 00680000 c58a9d08 c02c986a
c58a9ca4: 00000002 0000000e 0000000b 00000068
c58a9cb4: 00000000 00000068 c58a9d00 c0113bcf
#2 [c58a9cc0] do_page_fault at c0113bca
[RA: c0289cbc SP: c58a9cc4 FP: c58a9d04 SIZE: 68]
c58a9cc4: c02c9848 00000000 00000002 c58a9d08
c58a9cd4: dbb3d070 dea60d80 0000022a c58a9d08
c58a9ce4: c02c97a7 00000002 0000000e 0000000b
c58a9cf4: de4f20dc 00000000 c011379a c58a9d4c
c58a9d04: c0289cbc
#3 [c58a9d04] error_code (via page_fault) at c0289cba
EAX: 00000060 EBX: de4f20dc ECX: df912020 EDX: df8f0b57
DS: 007b ESI: 00000000 ES: 007b EDI: de4f20dc
SS: 0000 ESP: 00000020 EBP: c58a9d4c
CS: 0060 EIP: df8ed1da ERR: ffffffff EFLAGS: 00010202
[RA: ffffffff SP: c58a9d08 FP: c58a9d38 SIZE: 52]
c58a9d08: de4f20dc df912020 df8f0b57 00000000
c58a9d18: de4f20dc c58a9d4c 00000060 0000007b
c58a9d28: 0000007b 000000d8 ffffffff df8ed1da
c58a9d38: 00000060
crash>
crash> bt -f -S c58a9d38
PID: 12863 TASK: dbb3d070 CPU: 0 COMMAND: "mythbackend"
#0 [c58a9d38] schedule at c0288a62
[RA: df8f21b5 SP: c58a9d38 FP: c58a9dc0 SIZE: 140]
c58a9d38: 00000060 00010202 00000020 00000000
c58a9d48: de4f20dc c58a9dbc df8ed7d6 d74ba800
c58a9d58: de4f20dc de4f20dc dd9bd080 c58a9d78
c58a9d68: df8ed22a de4f20dc 00000000 de4f20dc
c58a9d78: c58a9de8 df8ed7d6 000000bc c58a9d9c
c58a9d88: 00000292 00000000 00000000 c56ce254
c58a9d98: de4f20dc 00000000 de4f2000 dd9bfd28
c58a9da8: deba3d28 00000000 00000020 00000000
c58a9db8: de4f20dc c58a9e48 df8f21b5
#1 [c58a9dc0] ehci_irq at df8f21b0
[RA: df8a83af SP: c58a9dc4 FP: c58a9e4c SIZE: 140]
c58a9dc4: dfb4d000 00000000 d74ba800 00000234
c58a9dd4: 00000001 de4f2000 00000000 00000001
c58a9de4: 00000020 c58a9e74 df8f21b5 d5a68acc
c58a9df4: 000000bc c58a9e1c 00000020 00000000
c58a9e04: de4f2000 00000000 00000001 00000020
c58a9e14: c58a9e28 c01b91a6 00000004 c58a9e48
c58a9e24: c58a9e54 c58a9f6c c015f4ad 00000000
c58a9e34: aecb02a0 00000000 de4f2000 00000000
c58a9e44: 00000000 c58a9e54 df8a83af
#2 [c58a9e4c] usb_hcd_irq at df8a83ac
[RA: c013b3e2 SP: c58a9e50 FP: c58a9e58 SIZE: 12]
c58a9e50: dd8ec440 c58a9e6c c013b3e2
#3 [c58a9e58] handle_IRQ_event at c013b3e0
[RA: c013c515 SP: c58a9e5c FP: c58a9e70 SIZE: 24]
c58a9e5c: 00000007 c031dc00 00000007 00000007
c58a9e6c: c58a9e7c c013c515
#4 [c58a9e70] handle_level_irq at c013c510
[RA: c0105f8a SP: c58a9e74 FP: c58a9e80 SIZE: 16]
c58a9e74: 000001c0 c031dc00 c58a9ea0 c0105f8a
#5 [c58a9e80] do_IRQ at c0105f84
[RA: c010453f SP: c58a9e84 FP: c58a9ea4 SIZE: 36]
c58a9e84: c013b3e2 00000007 c031dc00 00000000
c58a9e94: c512fc20 c0305e14 00000282 c58a9efc
c58a9ea4: c010453f
#6 [c58a9ea4] common_interrupt at c010453a
EAX: 0000009b EBX: c512fc20 ECX: 00000000 EDX: c0305e1c
DS: 007b ESI: c0305e14 ES: 007b EDI: 00000282
SS: 0000 ESP: 00000000 EBP: c58a9efc
CS: 0060 EIP: c0140853 ERR: fffffff8 EFLAGS: 00000282
[RA: fffffff8 SP: c58a9ea8 FP: c58a9ee0 SIZE: 60]
c58a9ea8: c512fc20 00000000 c0305e1c c0305e14
c58a9eb8: 00000282 c58a9efc 0000009b 0000007b
c58a9ec8: 0000007b 000000d8 fffffff8 c0140853
c58a9ed8: 00000060 00000282 00000000
crash>
crash> bt -f -S c58a9ee0
PID: 12863 TASK: dbb3d070 CPU: 0 COMMAND: "mythbackend"
#0 [c58a9ee0] schedule at c0288a62
[RA: c014c16f SP: c58a9ee0 FP: c58a9f34 SIZE: 88]
c58a9ee0: 00000000 00000000 c0305e04 c0305e1c
c58a9ef0: 000000fe de4fe980 00000001 c58a9f04
c58a9f00: c0140892 c58a9f0c c01408ae c58a9f30
c58a9f10: c014c0bc 00000286 c56ce234 c58a9f34
c58a9f20: 00000286 c56ce234 de4188e0 d548c500
c58a9f30: c58a9f38 c014c16f
#1 [c58a9f34] vfree at c014c16a
[RA: dfb1e77b SP: c58a9f38 FP: c58a9f3c SIZE: 8]
c58a9f38: c58a9f54 dfb1e77b
#2 [c58a9f3c] dvb_dvr_release at dfb1e776
[RA: c0155973 SP: c58a9f40 FP: c58a9f58 SIZE: 28]
c58a9f40: c58a9f48 c56ce270 00000010 dd6de5f8
c58a9f50: d548c500 c58a9f7c c0155973
#3 [c58a9f58] __fput at c0155971
[RA: c0155a33 SP: c58a9f5c FP: c58a9f80 SIZE: 40]
c58a9f5c: 00000000 00000000 dd6bb454 deee3120
c58a9f6c: dd6de5f8 d548c500 dee97500 00000000
c58a9f7c: c58a9f84 c0155a33
#4 [c58a9f80] fput at c0155a2e
[RA: c01535cf SP: c58a9f84 FP: c58a9f88 SIZE: 8]
c58a9f84: c58a9f9c c01535cf
#5 [c58a9f88] filp_close at c01535ca
[RA: c0154597 SP: c58a9f8c FP: c58a9fa0 SIZE: 24]
c58a9f8c: aecb0320 dee97500 00000030 d548c500
c58a9f9c: c58a9fb0 c0154597
#6 [c58a9fa0] sys_close at c0154592
[RA: c0103b30 SP: c58a9fa4 FP: c58a9fb4 SIZE: 20]
c58a9fa4: 0000000c 00000000 aecb0320 c58a8000
c58a9fb4: c0103b30
#7 [c58a9fb4] sysenter_entry at c0103b29
EAX: 00000006 EBX: 0000000c ECX: 00000000 EDX: b7ec87c4
DS: 007b ESI: 00000000 ES: 007b EDI: aecb0320
SS: 007b ESP: aecb021c EBP: aecb0428
CS: 0073 EIP: ffffe410 ERR: 00000006 EFLAGS: 00000293
[RA: 293 SP: c58a9fb8 FP: c58a9ffc SIZE: 72]
c58a9fb8: 0000000c 00000000 b7ec87c4 00000000
c58a9fc8: aecb0320 aecb0428 00000006 0000007b
c58a9fd8: 0000007b 00000000 00000006 ffffe410
c58a9fe8: 00000073 00000293 aecb021c 0000007b
c58a9ff8: c61ce0c6 c8e628d4
crash>
??!?
c58a9f5c: 00000000 00000000 dd6bb454 deee3120
c58a9f6c: dd6de5f8 d548c500 dee97500 00000000
crash> struct file.f_path d548c500
f_path = {
mnt = 0xdeee3120,
dentry = 0xdd6bb454
},
crash> struct dentry.d_inode 0xdd6bb454
d_inode = 0xdd6de5f8,
crash> struct file.f_op d548c500
f_op = 0xc55be540,
crash> struct file_operations.release 0xc55be540
release = 0xdfb1e720 <dvb_dvr_release>,
crash> struct file.private_data d548c500
private_data = 0xde4188e0,
crash> struct dvb_device 0xde4188e0
struct dvb_device {
list_head = {
next = 0xc56ce20c,
prev = 0xde418c20
},
fops = 0xc55be540,
adapter = 0xc56ce200,
type = 5,
id = 0,
readers = 1,
writers = 0,
users = 2,
wait_queue = {
lock = {
raw_lock = <incomplete type>
},
task_list = {
next = 0xde418904,
prev = 0xde418904
}
},
kernel_ioctl = 0,
priv = 0xc56ce234
}
crash> struct dmxdev 0xc56ce234
struct dmxdev {
dvbdev = 0xde418c20,
dvr_dvbdev = 0xde4188e0,
filter = 0xdfc62000,
demux = 0xc56ce004,
filternum = 256,
capabilities = 0,
exit = 0,
dvb_lock = 0,
dvr_orig_fe = 0x0,
dvr_buffer = {
data = 0x0,
size = 1925120,
pread = 676988,
pwrite = 676988,
error = 0,
queue = {
lock = {
raw_lock = <incomplete type>
},
task_list = {
next = 0xc56ce268,
prev = 0xc56ce268
}
},
lock = {
raw_lock = <incomplete type>
}
},
mutex = {
count = {
counter = 0
},
wait_lock = {
raw_lock = <incomplete type>
},
wait_list = {
next = 0xc56ce274,
prev = 0xc56ce274
}
},
lock = {
raw_lock = <incomplete type>
}
}
[c58a9d10] qh_destroy at df8f0b57
bt -f -S c58a9d10
PID: 12863 TASK: dbb3d070 CPU: 0 COMMAND: "mythbackend"
#0 [c58a9d10] schedule at c0288a62
[RA: df8ed22a SP: c58a9d10 FP: c58a9d68 SIZE: 92]
c58a9d10: df8f0b57 00000000 de4f20dc c58a9d4c
c58a9d20: 00000060 0000007b 0000007b 000000d8
c58a9d30: ffffffff df8ed1da 00000060 00010202
c58a9d40: 00000020 00000000 de4f20dc c58a9dbc
c58a9d50: df8ed7d6 d74ba800 de4f20dc de4f20dc
c58a9d60: dd9bd080 c58a9d78 df8ed22a
#1 [c58a9d68] end_unlink_async at df8ed225
[RA: df8ed7d6 SP: c58a9d6c FP: c58a9d7c SIZE: 20]
c58a9d6c: de4f20dc 00000000 de4f20dc c58a9de8
c58a9d7c: df8ed7d6
#2 [c58a9d7c] ehci_work at df8ed7d1
[RA: df8f21b5 SP: c58a9d80 FP: c58a9dec SIZE: 112]
c58a9d80: 000000bc c58a9d9c 00000292 00000000
c58a9d90: 00000000 c56ce254 de4f20dc 00000000
c58a9da0: de4f2000 dd9bfd28 deba3d28 00000000
c58a9db0: 00000020 00000000 de4f20dc c58a9e48
c58a9dc0: df8f21b5 dfb4d000 00000000 d74ba800
c58a9dd0: 00000234 00000001 de4f2000 00000000
c58a9de0: 00000001 00000020 c58a9e74 df8f21b5
#3 [c58a9dec] ehci_irq at df8f21b0
[RA: c013c515 SP: c58a9df0 FP: c58a9e70 SIZE: 132]
c58a9df0: d5a68acc 000000bc c58a9e1c 00000020
c58a9e00: 00000000 de4f2000 00000000 00000001
c58a9e10: 00000020 c58a9e28 c01b91a6 00000004
c58a9e20: c58a9e48 c58a9e54 c58a9f6c c015f4ad
c58a9e30: 00000000 aecb02a0 00000000 de4f2000
c58a9e40: 00000000 00000000 c58a9e54 df8a83af
c58a9e50: dd8ec440 c58a9e6c c013b3e2 00000007
c58a9e60: c031dc00 00000007 00000007 c58a9e7c
c58a9e70: c013c515
#4 [c58a9e70] handle_level_irq at c013c510
[RA: c0105f8a SP: c58a9e74 FP: c58a9e80 SIZE: 16]
c58a9e74: 000001c0 c031dc00 c58a9ea0 c0105f8a
#5 [c58a9e80] do_IRQ at c0105f84
[RA: c010453f SP: c58a9e84 FP: c58a9ea4 SIZE: 36]
c58a9e84: c013b3e2 00000007 c031dc00 00000000
c58a9e94: c512fc20 c0305e14 00000282 c58a9efc
c58a9ea4: c010453f
#6 [c58a9ea4] common_interrupt at c010453a
EAX: 0000009b EBX: c512fc20 ECX: 00000000 EDX: c0305e1c
DS: 007b ESI: c0305e14 ES: 007b EDI: 00000282
SS: 0000 ESP: 00000000 EBP: c58a9efc
CS: 0060 EIP: c0140853 ERR: fffffff8 EFLAGS: 00000282
[RA: fffffff8 SP: c58a9ea8 FP: c58a9ee0 SIZE: 60]
c58a9ea8: c512fc20 00000000 c0305e1c c0305e14
c58a9eb8: 00000282 c58a9efc 0000009b 0000007b
c58a9ec8: 0000007b 000000d8 fffffff8 c0140853
c58a9ed8: 00000060 00000282 00000000
--
...
--
try&error ...
struct usb_hcd 0xde4f2000
struct usb_hcd {
self = {
controller = 0xc54ef048,
busnum = 4,
bus_name = 0xc54ef0ec "0000:00:03.3",
uses_dma = 1 '\001',
otg_port = 0 '\0',
is_b_host = 0,
b_hnp_enable = 0,
devnum_next = 6,
devmap = {
devicemap = {50, 0, 0, 0}
},
root_hub = 0xddef9400,
bus_list = {
next = 0xddef9c28,
prev = 0xdf8c32ec
},
bandwidth_allocated = 0,
bandwidth_int_reqs = 0,
bandwidth_isoc_reqs = 0,
usbfs_dentry = 0xde3970d4,
class_dev = 0xde3d9860,
mon_bus = 0x0,
monitored = 0
},
kref = {
refcount = {
counter = 4
}
},
product_desc = 0xdf8f3816 "EHCI Host Controller",
irq_descr = "ehci_hcd:usb4\000\000\000\000\000\000\000\000\000\000",
rh_timer = {
entry = {
next = 0x0,
prev = 0x200200
},
expires = 4294896141,
function = 0xdf8a834c <rh_timer_func>,
data = 3729727488,
base = 0xc0373980,
start_site = 0xdf8a895b,
start_comm = "modprobe\000\000\000\000\000\000\000",
start_pid = 1259
},
status_urb = 0xddefaac0,
driver = 0xdf8f2960,
flags = 6,
rh_registered = 1,
uses_new_polling = 1,
poll_rh = 0,
poll_pending = 0,
wireless = 0,
irq = 7,
regs = 0xdf912000,
rsrc_start = 3960672256,
rsrc_len = 4096,
power_budget = 0,
pool = {0xdea06da0, 0xddefad40, 0xdea06ea0, 0xddefadc0},
state = 1,
hcd_priv = 0xde4f20dc
}
struct ehci_hcd 0xde4f20dc
struct ehci_hcd {
caps = 0xdf912000,
regs = 0xdf912020,
debug = 0x0,
hcs_params = 1061640,
lock = {
raw_lock = <incomplete type>
},
async = 0xdd9bd000,
reclaim = 0x0,
reclaim_ready = 1,
scanning = 0,
periodic_size = 1024,
periodic = 0xdd9bf000,
periodic_dma = 496758784,
i_thresh = 9,
pshadow = 0xdeba3000,
next_uframe = 6737,
periodic_sched = 0,
reset_done = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
bus_suspended = 0,
companion_ports = 0,
qh_pool = 0xdea062a0,
qtd_pool = 0xdecc90e0,
itd_pool = 0xddefac40,
sitd_pool = 0xddefabc0,
watchdog = {
entry = {
next = 0xc0373d00,
prev = 0xc6305b3c
},
expires = 4086383,
function = 0xdf8f1b52 <ehci_watchdog>,
data = 3729727708,
base = 0xc0373980,
start_site = 0xdf8ed8f1,
start_comm = "ps\000.agent\000\000\000\000\000\000",
start_pid = 1459
},
actions = 8,
stamp = 2793170,
next_statechange = 4294896115,
command = 65537,
is_tdi_rh_tt = 0,
no_selective_suspend = 0,
has_fsl_port_bug = 0,
big_endian_mmio = 0,
sbrn = 32 ' ',
stats = {
normal = 2307669,
error = 2,
reclaim = 169285,
lost_iaa = 59,
complete = 2319737,
unlink = 175
}
}
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