So,
since yesterday I'm running this:
drivers/usb/host/ehci-hcd.c:611
/* complete the unlinking of some qh [4.15.2.3] */
if (status & STS_IAA) {
if (ehci->reclaim) {
COUNT (ehci->stats.reclaim);
ehci->reclaim_ready = 1;
bh = 1;
} else {
printk(KERN_ERR "AUA: ehci reclaim NULL status: %u\n", status);
}
}
and got (once so far):
Jul 11 16:19:03 denon kernel: [13475.940000] drivers/usb/input/hid-core.c:
submitting ctrl urb: Get_Report wValue=0x0306 wIndex=0x0000 wLength=2
Jul 11 16:19:03 denon kernel: [13475.960000] drivers/usb/input/hid-core.c:
submitting ctrl urb: Get_Report wValue=0x0336 wIndex=0x0000 wLength=2
Jul 11 16:19:22 denon kernel: [13495.008000] AUA: ehci reclaim NULL status: 32
Jul 11 16:19:22 denon kernel: [13495.364000] usbdev4.4_ep81: ep_device_release
called for usbdev4.4_ep81
Jul 11 16:19:22 denon kernel: [13495.364000] usbdev4.4_ep82: ep_device_release
called for usbdev4.4_ep82
Jul 11 16:19:22 denon kernel: [13495.368000] usbdev4.4_ep84: ep_device_release
called for usbdev4.4_ep84
Jul 11 16:20:03 denon kernel: [13535.964000] drivers/usb/input/hid-core.c:
submitting ctrl urb: Get_Report wValue=0x0331 wIndex=0x0000 wLength=3
Jul 11 16:20:03 denon kernel: [13536.004000] drivers/usb/input/hid-core.c:
submitting ctrl urb: Get_Report wValue=0x0326 wIndex=0x0000 wLength=3
no crash, all usb devices happy.
Conclusion:
- It's the bug. Anywhere else in the code reclaim_ready will only set if
ehci->reclaim is valid.
- I spammed the wrong ML :)
I still have some questions to the usb ppl:
* what is on status STS_IAA supposed to do?
* should bh set anyway and call ehci_work?
* what is [4.15.2.3] referring to?
Markus Rechberger schrieb:
> Hi Christoph,
>
> please keep the linux-usb-devel ML in CC :-)
I try to but I'm not subscribed. Mh, I'll check if I'm still subscribed at
linux-kernel ;)
This bug exists in actual and older versions too.
>
> thanks,
> Markus
>
thank you!
chris
ps: some statistics
[EMAIL PROTECTED] /sys/class/usb_host/usb_host4]$ cat registers
bus pci, device 0000:00:03.3 (driver 10 Dec 2004)
EHCI Host Controller
EHCI 1.00, hcd state 1
ownership 01000001 linux
SMI sts/enable 0xe0080000
structural params 0x00103308
capability params 0x00007070
status 4008 Periodic FLR
command 040011 (park)=0 ithresh=4 Periodic period=1024 RUN
intrenable 37 IAA FATAL PCD ERR INT
uframe 1832
port 1 status 003000 POWER OWNER sig=se0
port 2 status 003000 POWER OWNER sig=se0
port 3 status 001005 POWER sig=se0 PE CONNECT
port 4 status 001000 POWER sig=se0
port 5 status 001000 POWER sig=se0
port 6 status 001005 POWER sig=se0 PE CONNECT
port 7 status 001000 POWER sig=se0
port 8 status 001000 POWER sig=se0
irq normal 6466227 err 18 reclaim 486483 (lost 2167)
complete 6553575 unlink 660
> On 7/10/07, Christoph <[EMAIL PROTECTED]> wrote:
>>
>> Alan Stern schrieb:
>> > On Sun, 8 Jul 2007, Markus Rechberger wrote:
>> >
>> >> On 7/8/07, Christoph <[EMAIL PROTECTED]> wrote:
>> >>> 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]
>> >
>> > For whatever it's worth, the crash occurred in end_async_unlink because
>> > ehci->reclaim was NULL. This may imply that ehci->reclaim_ready was
>> > set when it shouldn't be. Don't ask me how either of these could
>> > have happened.
>> >
>> > Alan Stern
>> >
>>
>> mh, how about this:
>> drivers/usb/host/ehci-hcd.c:640
>>
>> /* complete the unlinking of some qh [4.15.2.3] */
>> if (status & STS_IAA) {
>> COUNT (ehci->stats.reclaim);
>> ehci->reclaim_ready = 1;
>> bh = 1;
>> }
>> ...
>> if (bh)
>> ehci_work (ehci);
>>
>> bh was set to 1 ... possible there?!
>>
>> chris
>>
>>
>> ps: found the box this morning dead ... the kexec kernel also crashed,
>> same story.
>> dvb module was loaded, but mythtv not running.
>> (rc.S was run I messed with the boot options)
>>
>> psps: found the box dead again when I came back from work ...
>> no dvb stuff in the backtrace, same story.
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> Em28xx mailing list
>> [EMAIL PROTECTED]
>> http://mcentral.de/mailman/listinfo/em28xx
>>
>
>
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