David Brownell wrote:
David Brownell wrote:
> On Sunday 17 September 2006 9:59 pm, Aras Vaichas wrote:
>> I'm using an at91rm9200 with Linux 2.6.16. Under some unusual circumstances,
>> I
>> can create a failure.
>
> Can you reproduce this with 2.6.18-rc7? That newer driver code may
> be usable as a straight backport.
I haven't tried. As the at91 kernel is (generally) very stable, I don't tend to
do any kernel changes or upgrades any more. If I get a chance though, I might
download 2.6.18 and give it a try.
... SNIP ...
> Hmm, a no-symbols stack trace is not at all useful. But it does
> seem like this is another case where the usbcore cleanup after a
> hardware fault ("Unrecoverable Error" = UE) is broken.
>
> A better problem report would include
> not just kernel symbols, but also CONFIG_USB_DEBUG would be set so
> that some potentially-useful data would be syslogged.
I recompiled with extra kernel info, but USB debugging doesn't seem to add
anything once the problem begins. I hope this provides more information. I'm
not much of a kernel hacker at this level of debugging but I can implement
suggestions.
Jan 1 00:02:48 local2.debug in.ftpd[322]: command list
at91_ohci at91_ohci: OHCI Unrecoverable Error, disabled
at91_ohci at91_ohci: HC died; cleaning up
irq23: nobody cared
Pid: 322, comm: in.ftpd
CPU: 0
PC is at __do_softirq+0x44/0xd0
LR is at irq_exit+0x44/0x58
pc : [<c0038d2c>] lr : [<c0038eb4>] Not tainted
sp : c180bf44 ip : c180bf68 fp : c180bf64
r10: c180bfb0 r9 : c020d7c0 r8 : c0215360
r7 : 0000000a r6 : c180a000 r5 : c180a000 r4 : 00000002
r3 : 20000013 r2 : 00000002 r1 : 00000001 r0 : 00000001
Flags: nzCv IRQs on FIQs on Mode SVC_32 Segment user
Control: C000317F Table: 21030000 DAC: 00000015
[<c001fc44>] (show_regs+0x0/0x4c) from [<c001ea54>] (report_bad_irq+0x6c/0xcc)
r4 = C180BEFC
[<c001e9e8>] (report_bad_irq+0x0/0xcc) from [<c001ed84>]
(do_level_IRQ+0x80/0xbc)
r5 = 00000017 r4 = C020DC6C
[<c001ed04>] (do_level_IRQ+0x0/0xbc) from [<c001ee14>] (asm_do_IRQ+0x54/0x13c)
r6 = 00000017 r5 = C180A000 r4 = FFFFFFFF
[<c001edc0>] (asm_do_IRQ+0x0/0x13c) from [<c001d998>] (__irq_svc+0x38/0x64)
[<c0038ce8>] (__do_softirq+0x0/0xd0) from [<c0038eb4>] (irq_exit+0x44/0x58)
r8 = 00000000 r7 = 00000001 r6 = 00000001 r5 = C180A000
r4 = C180A000
[<c0038e70>] (irq_exit+0x0/0x58) from [<c001eee4>] (asm_do_IRQ+0x124/0x13c)
r4 = FFFFFFFF
[<c001edc0>] (asm_do_IRQ+0x0/0x13c) from [<c001dbac>] (__irq_usr+0x4c/0xa0)
[<c0022ff0>] (dump_stack+0x0/0x14) from [<c001ea58>] (report_bad_irq+0x70/0xcc)
[<c001e9e8>] (report_bad_irq+0x0/0xcc) from [<c001ed84>]
(do_level_IRQ+0x80/0xbc)
r5 = 00000017 r4 = C020DC6C
[<c001ed04>] (do_level_IRQ+0x0/0xbc) from [<c001ee14>] (asm_do_IRQ+0x54/0x13c)
r6 = 00000017 r5 = C180A000 r4 = FFFFFFFF
[<c001edc0>] (asm_do_IRQ+0x0/0x13c) from [<c001d998>] (__irq_svc+0x38/0x64)
[<c0038ce8>] (__do_softirq+0x0/0xd0) from [<c0038eb4>] (irq_exit+0x44/0x58)
r8 = 00000000 r7 = 00000001 r6 = 00000001 r5 = C180A000
r4 = C180A000
[<c0038e70>] (irq_exit+0x0/0x58) from [<c001eee4>] (asm_do_IRQ+0x124/0x13c)
r4 = FFFFFFFF
[<c001edc0>] (asm_do_IRQ+0x0/0x13c) from [<c001dbac>] (__irq_usr+0x4c/0xa0)
handlers:
[<c011aab8>] (usb_hcd_irq+0x0/0x84)
irq23: nobody cared
Thank you for your time,
Aras Vaichas
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