Well here is my trace. I have the same problem. Well actually just a
snippet of the trace. It kind of keeps going for a couple of pages.
Any advice on how to fix this would be appreciated. After the long
stack dump, it goes through which function called which function, which
would require me to look up the symbols, which I can do if it will help.
This is on an Arm7 board, using the pl2303 module, using linux
2.4.21-rmk1.
David
~ # stty -F /dev/ttyUSB0 onlcr
~ # echo -e "This is a test\nThat's right a test\n" > /dev/ttyUSB0
Scheduling in interrupt
kernel BUG at sched.c:575!
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c1d90000
[00000000] *pgd=41b0a811, *pmd = 41b0a811, *pte = 00000000, *ppte = 00000000
Internal error: Oops: e3140807
CPU: 0
pc : [<c001e554>] lr : [<c00248ac>] Tainted: P
sp : c05d7b5c ip : c05d7b14 fp : c05d7b6c
r10: c1d71368 r9 : 00000000 r8 : c05d7ba0
r7 : c05d6000 r6 : c05d6000 r5 : 00000000 r4 : 00000000
r3 : 00000000 r2 : 00000001 r1 : 00000001 r0 : 00000001
Flags: nZCv IRQs on FIQs on Mode SVC_32 Segment user
Control: 217F Table: 41D90015 DAC: 00000015
Process echo (pid: 113, stack limit = 0xc05d6374)
Stack: (0xc05d7b5c to 0xc05d8000)
7b40: c1b3c078
7b60: c05d7b9c c05d7b70 c0020ea0 c001e520 000c1000 c1b3c078 c05d6000 00000001
7b80: c1b3c080 c05d7ba0 00000000 c1d71368 c05d7bd0 c05d7ba0 c001bd80 c0020e40
On Wed, 2003-11-12 at 11:02, Pete Zaitcev wrote:
> On Wed, Nov 12, 2003 at 08:36:50PM +0200, Float wrote:
> > pl2303 seems to be broken in 2.4.23-rc1.
>
> > toshi:/usr/src# modprobe pl2303
> > toshi:/usr/src# stty -F /dev/ttyUSB0 onlcr
> > toshi:/usr/src# echo test > /dev/ttyUSB0
> > Scheduling in interrupt
> > kernel bug at sched.c:564!
> > invalid operand: 0000
> > ...
> > (register contents and stack trace)
>
> This is probably the write-under-semaphore thing & echo from
> the device. You should have posted the trace to be sure.
>
> It was on my TODO for a long time to fix the semaphore,
> but no time so far. It would be helpful to see your trace.
>
--
~~~~~~~~~~~~~~~~~~~~~~~~
David Meggy
Engineering
Technical Solutions Inc.
Unit #1 7157 Honeyman St
Delta BC Canada, V4G 1E2
www.techsol.ca
eMail: [EMAIL PROTECTED]
Tel: 604 946 TECH (8324)
Fax: 604 946 6445
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