-----Original Message-----
From: Randy.Dunlap [mailto:[EMAIL PROTECTED]
Sent: Tuesday, September 13, 2005 10:28 AM
To: Liau.Cloud
Cc: [email protected]
Subject: Re: [linux-usb-devel] encode Video data, and saved data in USB storage


On Mon, 12 Sep 2005 14:04:06 +0800 Liau.Cloud wrote:

>> Dear all:
>>       I used VWEB vw2010 to encode Video data, and saved data in USB storage 
>>  through PCI. When I used NEC HC chip, system will crash at processing the 
>> write  function of VWEB
>> encode. But it's OK with VIA HC chip. What was the cause of the different?
>>  
>> NEC chip log:
>> 
>> # mstest 6 /mnt_usb/usb1/   <----- run storage access test program

>Are these test programs available somewhere?  where?

The test program (mstest) confirm data can be R/W in storage. The data access 
is OK if isn't running encode program.




[big snip]


>> 
>> # ./encoder option_files/enc_mp2ts_ntsc_02m.ini /mnt_usb/usb1/test -i2ctable 
>> <--------run VWEB encode program
>> +
>>  cfifo.Write(p_buf);
>> ehci_hcd 00:04.2: fatal error  <--------------------------------crash point
>> kernel BUG at hcd/ehci-mem.c:129!

>Yes, being in kernel 2.4.18, that probably didn't surprise anyone.

But is OK with VIA chip

>And I seem to have missed your answer to my question about using
>something newer than 2.4.18....

The kernal is used montaviata licensed. It only supports 2.4.X. 

>It's really difficult to get someone interested in bugs in a
>kernel that old.


>> Unable to handle kernel NULL pointer dereference at virtual address 00000000
>> mm = c0231380 pgd = c0004000
>> *pgd = 00000000, *pmd = 00000000
>> Internal error: Oops: ffffffff
>> CPU: 0
>> pc : [<c0027590>]    lr : [<c00306bc>]    Not tainted
>> sp : c41c7ec0  ip : c41c7e8c  fp : c41c7ed0
>> r10: c41c6374  r9 : c41c7fbc  r8 : c41c6364
>> r7 : c41c6000  r6 : 00000000  r5 : c41dbc00  r4 : 00000000
>> r3 : 00000000  r2 : 00000001  r1 : 00000001  r0 : 00000001
>> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment kernel
> >Control: 39FF  Table: 071D0000  DAC: 0000001D


---
~Randy
You can't do anything without having to do something else first.
-- Belefant's Law


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