XSysAce driver cant mount DOS part

XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

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Hi all,

I've been workig with this for a while but have made no progress.
Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied it to get clean code.  
I inherited the previous code from another developer.

My problem is that mounting the DOS partition always fails in a short time with a kernel oops.

ECAU-9999:# Oops: kernel access of bad area, sig: 11 [#1]                       
PREEMPT                                                                         
NIP: C00701C8 LR: C0070C18 CTR: 00000000                                        
REGS: c0391dd0 TRAP: 0300   Not tainted  (2.6.17.1)                             
MSR: 00021030 <ME,IR,DR>  CR: 22028082  XER: 0000000B                           
DAR: 00000000, DSISR: 00800000                                                  
TASK = c0373030[4] 'events/0' THREAD: c0390000                                  
GPR00: 00000080 C0391E80 C0373030 C02CAC00 C0E03000 C0E03154 00000000 C02CAC00  
GPR08: 00200200 00000000 00100100 00000000 00051A4B FFFFDE60 03BD4900 007FFF3B  
GPR16: 00400000 00000001 FFFFFFFF 03BCDC58 00000000 007FFF00 00000002 C0280000  
GPR24: C0363A10 0000000B 00000000 00000000 00000000 C02CAC00 C035ED20 C0E03000  
NIP [C00701C8] free_block+0x8c/0x138                                            
LR [C0070C18] drain_array+0xb8/0x124                                            
Call Trace:                                   

The setup:
My own build system.
Kernel 2.6.17.1 with lots of xilinx stuff, eth, i2c, xsysace.  Crosscompiled for PPC405.
Latest, clean XSysAce code.  mods:  major hardcoded to = 125.  Polled mode.
CF:  3 partitions,
1:  DOS FAT16
2:  Ext2  main
3:  Ext2  rescue

This build boots up fine, mounts a ext2 as root fine.  I can also mount the rescue partition with no problems.

Does anyone have any pointers of where I should look for problems?

My next step is to go and set it up for interrupt service and see if that changes anything.
 
Thanks,

Joe Robertson
Joseph.Robertson@sanmina-sci.com


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Re: XSysAce driver cant mount DOS part

[Grant Likely]

On 7/12/07, Robertson, Joseph M. <joseph.robertson@sanmina-sci.com> wrote:
>
>  I've been workig with this for a while but have made no progress.
>  Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied it to
> get clean code.
>  I inherited the previous code from another developer.

Who's tree are you using?  Montavistas?  Mainline?

Which sysace driver are you using?  The old one from Xilinx or the new one?

>
>  My problem is that mounting the DOS partition always fails in a short time
> with a kernel oops.
>
>  ECAU-9999:# Oops: kernel access of bad area, sig: 11 [#1]
>
>  PREEMPT
---8<---snip--->8---
>  LR [C0070C18] drain_array+0xb8/0x124
>
>  Call Trace:

Did you trim off the call trace?  The call trace is pretty useful for
figuring out what happened.

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

Re: XSysAce driver cant mount DOS part

[Jeff Angielski]

On Thu, 2007-07-12 at 13:03 -0500, Robertson, Joseph M. wrote:
> Hi all,
> 
> I've been workig with this for a while but have made no progress.
> Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied
> it to get clean code. 
> I inherited the previous code from another developer.
> 
> My problem is that mounting the DOS partition always fails in a short
> time with a kernel oops.

Can you access that partition on your Linux host using a CF adapter?

Can you access that partition from the uboot prompt?

How did you format that partition?  mkfs.msdos?


-- 
Jeff Angielski
The PTR Group
www.theptrgroup.com

RE: XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

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Hi!

Wow, quick replies.

RE: Tree.  
Its the mainline 2.6.17.1, with
denx ppc patches from 4.0.0?  IIRC.
I redid the patch set for the xsysace to get a known baseline.
Its a custom build system, which I developed over the years, ported to use a ppc405 crosscompiler I made from
CrossTool-0.42. Its very similar to uClinux, but with a simpler config system.
The compiler is gcc.3.4.1 with glibc 2.3.3 (yeah we use glibc).

The XsysAce patch is in the normal place, only change I made was to define the major number.
And I moved xbasic_types.c/h to another folder onthe path since xilinx_iic drivers uses it too, and I was getting redefine errors.
One thing I just thought of was I did not run the 'normal' config stuff, any deps in there?
I can go look at the kconfigs and see.

RE: Xilinx SysAce driver
The HW group used Xilinx env 8.2.02i, and the project shows Sysace_compactflash driver:  sysace_v1_01_a

The HW is a Virtex-4 with the embedded ppc405.  The Xsysace chip is supposed tobe using irq_intr = 2.

The system actually works fine using the Ext2 fs, but if we want to upgrade the fpga code, I need to be able to write to the dos part.

Thanks so much.


Joe Robertson
Joseph.Robertson@sanmina-sci.com





-----Original Message-----
From: glikely@secretlab.ca on behalf of Grant Likely
Sent: Thu 7/12/2007 1:16 PM
To: Robertson, Joseph M.
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: XSysAce driver cant mount DOS part
 
On 7/12/07, Robertson, Joseph M. <joseph.robertson@sanmina-sci.com> wrote:
>
>  I've been workig with this for a while but have made no progress.
>  Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied it to
> get clean code.
>  I inherited the previous code from another developer.

Who's tree are you using?  Montavistas?  Mainline?

Which sysace driver are you using?  The old one from Xilinx or the new one?

>
>  My problem is that mounting the DOS partition always fails in a short time
> with a kernel oops.
>
>  ECAU-9999:# Oops: kernel access of bad area, sig: 11 [#1]
>
>  PREEMPT
---8<---snip--->8---
>  LR [C0070C18] drain_array+0xb8/0x124
>
>  Call Trace:

Did you trim off the call trace?  The call trace is pretty useful for
figuring out what happened.

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195




CONFIDENTIALITY
This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited.  If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof.
ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING.  Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity.

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Re: XSysAce driver cant mount DOS part

[Grant Likely]

On 7/12/07, Robertson, Joseph M. <joseph.robertson@sanmina-sci.com> wrote:
>  RE: Tree.
>  Its the mainline 2.6.17.1, with
>  denx ppc patches from 4.0.0?  IIRC.
>  I redid the patch set for the xsysace to get a known baseline.
>  Its a custom build system, which I developed over the years, ported to use
> a ppc405 crosscompiler I made from
>  CrossTool-0.42. Its very similar to uClinux, but with a simpler config
> system.
>  The compiler is gcc.3.4.1 with glibc 2.3.3 (yeah we use glibc).

Heh, so do I.  So do a lot of people.  glibc *is* for embedded
systems, regardless of what some may say.  :-)

>  The XsysAce patch is in the normal place, only change I made was to define
> the major number.
>  And I moved xbasic_types.c/h to another folder onthe path since xilinx_iic
> drivers uses it too, and I was getting redefine errors.
>  One thing I just thought of was I did not run the 'normal' config stuff,
> any deps in there?
>  I can go look at the kconfigs and see.
>
>  RE: Xilinx SysAce driver
>  The HW group used Xilinx env 8.2.02i, and the project shows
> Sysace_compactflash driver:  sysace_v1_01_a

Okay, so that's the old driver.  There is a new driver that has
considerably better performance which you might want to try; but it
doesn't support insertion/removal yet.  It is about to be pulled into
mainline, but you can get it here too:

http://article.gmane.org/gmane.linux.kernel/526293/match=xsysace+c

>
>  The HW is a Virtex-4 with the embedded ppc405.  The Xsysace chip is
> supposed tobe using irq_intr = 2.
>
>  The system actually works fine using the Ext2 fs, but if we want to upgrade
> the fpga code, I need to be able to write to the dos part.

2.6.17 is rather old.  You might be hitting an old bug.  Virtex
support in the newer kernels is significantly better.  Have you
considered upgrading?  I've got a bunch of patches in my git tree that
add the TEMAC and other drivers to a more recent kernel.  My internal
tree is based on 2.6.22; I'll try to update my external tree to match
in the next day or so:

http://git.secretlab.ca/cgi-bin/gitweb.cgi?h=virtex-dev;p=linux-2.6.git;a=shortlog

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

RE: XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

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See answers to queries below.

Thanks,
Joe Robertson
Joseph.Robertson@sanmina-sci.com




-----Original Message-----
From: Jeff Angielski [mailto:jeff@theptrgroup.com]
Sent: Thu 7/12/2007 1:26 PM
To: Robertson, Joseph M.
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: XSysAce driver cant mount DOS part
 
On Thu, 2007-07-12 at 13:03 -0500, Robertson, Joseph M. wrote:
> Hi all,
> 
> I've been workig with this for a while but have made no progress.
> Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied
> it to get clean code. 
> I inherited the previous code from another developer.
> 
> My problem is that mounting the DOS partition always fails in a short
> time with a kernel oops.

Can you access that partition on your Linux host using a CF adapter?

 Yes.

Can you access that partition from the uboot prompt?

 Dunno, I don't think I have uboot set to let me do that.
 precompiled setup, I'd have to work on it.
 
How did you format that partition?  mkfs.msdos?

  Yes, mkdosfs -F 16 /dev/sda1  (its a fat16, 32Mb partition)




-- 
Jeff Angielski
The PTR Group
www.theptrgroup.com





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This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited.  If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof.
ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING.  Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity.

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RE: XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

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Hi,

I will try the new code you suggest.  We are not supporting CF changes at all (factory only).


RE: 2.6.17.1 being old. 
Well, old is relative.  Once this works, and its 99% there, we won't change it.
We'll probably be using this kernel for 3-5 years.
In fact, at this point we've got 2.5 years invested, and about 4 months of testing already, so changing now is bad.
That would mean I have to retest a whole bunch of stuff.

Thanks,
Joe Robertson
Joseph.Robertson@sanmina-sci.com



-----Original Message-----
From: glikely@secretlab.ca on behalf of Grant Likely
Sent: Thu 7/12/2007 2:06 PM
To: Robertson, Joseph M.
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: XSysAce driver cant mount DOS part
 
On 7/12/07, Robertson, Joseph M. <joseph.robertson@sanmina-sci.com> wrote:
>  RE: Tree.
>  Its the mainline 2.6.17.1, with
>  denx ppc patches from 4.0.0?  IIRC.
>  I redid the patch set for the xsysace to get a known baseline.
>  Its a custom build system, which I developed over the years, ported to use
> a ppc405 crosscompiler I made from
>  CrossTool-0.42. Its very similar to uClinux, but with a simpler config
> system.
>  The compiler is gcc.3.4.1 with glibc 2.3.3 (yeah we use glibc).

Heh, so do I.  So do a lot of people.  glibc *is* for embedded
systems, regardless of what some may say.  :-)

>  The XsysAce patch is in the normal place, only change I made was to define
> the major number.
>  And I moved xbasic_types.c/h to another folder onthe path since xilinx_iic
> drivers uses it too, and I was getting redefine errors.
>  One thing I just thought of was I did not run the 'normal' config stuff,
> any deps in there?
>  I can go look at the kconfigs and see.
>
>  RE: Xilinx SysAce driver
>  The HW group used Xilinx env 8.2.02i, and the project shows
> Sysace_compactflash driver:  sysace_v1_01_a

Okay, so that's the old driver.  There is a new driver that has
considerably better performance which you might want to try; but it
doesn't support insertion/removal yet.  It is about to be pulled into
mainline, but you can get it here too:

http://article.gmane.org/gmane.linux.kernel/526293/match=xsysace+c

>
>  The HW is a Virtex-4 with the embedded ppc405.  The Xsysace chip is
> supposed tobe using irq_intr = 2.
>
>  The system actually works fine using the Ext2 fs, but if we want to upgrade
> the fpga code, I need to be able to write to the dos part.

2.6.17 is rather old.  You might be hitting an old bug.  Virtex
support in the newer kernels is significantly better.  Have you
considered upgrading?  I've got a bunch of patches in my git tree that
add the TEMAC and other drivers to a more recent kernel.  My internal
tree is based on 2.6.22; I'll try to update my external tree to match
in the next day or so:

http://git.secretlab.ca/cgi-bin/gitweb.cgi?h=virtex-dev;p=linux-2.6.git;a=shortlog

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195


CONFIDENTIALITY
This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited.  If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof.
ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING.  Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity.

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RE: XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

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Hi,

Ok this is surely enough to drive you nuts, but all I get is an error.
How the heck do you debug patch?  All I get is this.

root@tocnet_ws_9:/mnt/public2/ecau/src/linux/linux-2.6.17.1# patch -p1 -un  -i xsys.patch 
patch unexpectedly ends in middle of line
patch: **** Only garbage was found in the patch input.

I copied the text from the htmlpage and pasted to a file.
Its very weird to me, I've never seen that.  A line number would be nice.


Joe Robertson
x8259
Joseph.Robertson@sanmina-sci.com

CONFIDENTIALITY
This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited.  If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof.
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Re: XSysAce driver cant mount DOS part

[Grant Likely]

On 7/12/07, Robertson, Joseph M. <joseph.robertson@sanmina-sci.com> wrote:
> Hi,
>
>  Ok this is surely enough to drive you nuts, but all I get is an error.
>  How the heck do you debug patch?  All I get is this.
>
> root@tocnet_ws_9:/mnt/public2/ecau/src/linux/linux-2.6.17.1#
> patch -p1 -un  -i xsys.patch
>  patch unexpectedly ends in middle of line
>  patch: **** Only garbage was found in the patch input.

The Gmane web view mangles patches.  You can use an NNTP client to
talk to gmane to get them without mangling.

But to keep things simple, I'll just email you the patch.

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

Re: XSysAce driver cant mount DOS part

[urwithsudheer]

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Hi

Robertson, Joseph M. wrote:
>
> Hi all,
>
> I've been workig with this for a while but have made no progress.
> Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied 
> it to get clean code. 
> I inherited the previous code from another developer.
>
Can you send the link to xsysace driver source code from where you obtained.


Thanks
Sudheer


>
> My problem is that mounting the DOS partition always fails in a short 
> time with a kernel oops.
>
> ECAU-9999:# Oops: kernel access of bad area, sig: 11 
> [#1]                      
> PREEMPT                                                                        
> NIP: C00701C8 LR: C0070C18 CTR: 
> 00000000                                       
> REGS: c0391dd0 TRAP: 0300   Not tainted  
> (2.6.17.1)                            
> MSR: 00021030 <ME,IR,DR>  CR: 22028082  XER: 
> 0000000B                          
> DAR: 00000000, DSISR: 
> 00800000                                                 
> TASK = c0373030[4] 'events/0' THREAD: 
> c0390000                                 
> GPR00: 00000080 C0391E80 C0373030 C02CAC00 C0E03000 C0E03154 00000000 
> C02CAC00 
> GPR08: 00200200 00000000 00100100 00000000 00051A4B FFFFDE60 03BD4900 
> 007FFF3B 
> GPR16: 00400000 00000001 FFFFFFFF 03BCDC58 00000000 007FFF00 00000002 
> C0280000 
> GPR24: C0363A10 0000000B 00000000 00000000 00000000 C02CAC00 C035ED20 
> C0E03000 
> NIP [C00701C8] 
> free_block+0x8c/0x138                                           
> LR [C0070C18] 
> drain_array+0xb8/0x124                                           
> Call Trace:                                  
>
> The setup:
> My own build system.
> Kernel 2.6.17.1 with lots of xilinx stuff, eth, i2c, xsysace.  
> Crosscompiled for PPC405.
> Latest, clean XSysAce code.  mods:  major hardcoded to = 125.  Polled 
> mode.
> CF:  3 partitions,
> 1:  DOS FAT16
> 2:  Ext2  main
> 3:  Ext2  rescue
>
> This build boots up fine, mounts a ext2 as root fine.  I can also 
> mount the rescue partition with no problems.
>
> Does anyone have any pointers of where I should look for problems?
>
> My next step is to go and set it up for interrupt service and see if 
> that changes anything.
>
> Thanks,
>
> Joe Robertson
> Joseph.Robertson@sanmina-sci.com
>
>
> CONFIDENTIALITY
> This e-mail message and any attachments thereto, is intended only for 
> use by the addressee(s) named herein and may contain legally 
> privileged and/or confidential information. If you are not the 
> intended recipient of this e-mail message, you are hereby notified 
> that any dissemination, distribution or copying of this e-mail 
> message, and any attachments thereto, is strictly prohibited. If you 
> have received this e-mail message in error, please immediately notify 
> the sender and permanently delete the original and any copies of this 
> email and any prints thereof.
> ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL 
> IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the 
> Uniform Electronic Transactions Act or the applicability of any other 
> law of similar substance and effect, absent an express statement to 
> the contrary hereinabove, this e-mail message its contents, and any 
> attachments hereto are not intended to represent an offer or 
> acceptance to enter into a contract and are not otherwise intended to 
> bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), 
> or any other person or entity.
> ------------------------------------------------------------------------
>
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RE: XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

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Hi, 

Yes, I got it from here.
http://www.cs.york.ac.uk/rtslab/demos/amos/xupv2pro/patches/linuxppc-2.6.17.1-sysace-1.2.patch

The 'official' one, yes?

Thanks,

Joe Robertson
Joseph.Robertson@sanmina-sci.com



-----Original Message-----
From: urwithsudheer [mailto:urwithsudheer@gmail.com]
Sent: Fri 7/13/2007 4:25 AM
To: Robertson, Joseph M.
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: XSysAce driver cant mount DOS part
 
Hi

Robertson, Joseph M. wrote:
>
> Hi all,
>
> I've been workig with this for a while but have made no progress.
> Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied 
> it to get clean code. 
> I inherited the previous code from another developer.
>
Can you send the link to xsysace driver source code from where you obtained.


Thanks
Sudheer


>
> My problem is that mounting the DOS partition always fails in a short 
> time with a kernel oops.
>
> ECAU-9999:# Oops: kernel access of bad area, sig: 11 
> [#1]                      
> PREEMPT                                                                        
> NIP: C00701C8 LR: C0070C18 CTR: 
> 00000000                                       
> REGS: c0391dd0 TRAP: 0300   Not tainted  
> (2.6.17.1)                            
> MSR: 00021030 <ME,IR,DR>  CR: 22028082  XER: 
> 0000000B                          
> DAR: 00000000, DSISR: 
> 00800000                                                 
> TASK = c0373030[4] 'events/0' THREAD: 
> c0390000                                 
> GPR00: 00000080 C0391E80 C0373030 C02CAC00 C0E03000 C0E03154 00000000 
> C02CAC00 
> GPR08: 00200200 00000000 00100100 00000000 00051A4B FFFFDE60 03BD4900 
> 007FFF3B 
> GPR16: 00400000 00000001 FFFFFFFF 03BCDC58 00000000 007FFF00 00000002 
> C0280000 
> GPR24: C0363A10 0000000B 00000000 00000000 00000000 C02CAC00 C035ED20 
> C0E03000 
> NIP [C00701C8] 
> free_block+0x8c/0x138                                           
> LR [C0070C18] 
> drain_array+0xb8/0x124                                           
> Call Trace:                                  
>
> The setup:
> My own build system.
> Kernel 2.6.17.1 with lots of xilinx stuff, eth, i2c, xsysace.  
> Crosscompiled for PPC405.
> Latest, clean XSysAce code.  mods:  major hardcoded to = 125.  Polled 
> mode.
> CF:  3 partitions,
> 1:  DOS FAT16
> 2:  Ext2  main
> 3:  Ext2  rescue
>
> This build boots up fine, mounts a ext2 as root fine.  I can also 
> mount the rescue partition with no problems.
>
> Does anyone have any pointers of where I should look for problems?
>
> My next step is to go and set it up for interrupt service and see if 
> that changes anything.
>
> Thanks,
>
> Joe Robertson
> Joseph.Robertson@sanmina-sci.com
>
>
> CONFIDENTIALITY
> This e-mail message and any attachments thereto, is intended only for 
> use by the addressee(s) named herein and may contain legally 
> privileged and/or confidential information. If you are not the 
> intended recipient of this e-mail message, you are hereby notified 
> that any dissemination, distribution or copying of this e-mail 
> message, and any attachments thereto, is strictly prohibited. If you 
> have received this e-mail message in error, please immediately notify 
> the sender and permanently delete the original and any copies of this 
> email and any prints thereof.
> ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL 
> IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the 
> Uniform Electronic Transactions Act or the applicability of any other 
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> attachments hereto are not intended to represent an offer or 
> acceptance to enter into a contract and are not otherwise intended to 
> bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), 
> or any other person or entity.
> ------------------------------------------------------------------------
>
> _______________________________________________
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> https://ozlabs.org/mailman/listinfo/linuxppc-embedded



CONFIDENTIALITY
This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited.  If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof.
ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING.  Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity.

[-- Attachment #2: Type: text/html, Size: 8736 bytes --]

Re: XSysAce driver cant mount DOS part

[urwithsudheer]

[-- Attachment #1: Type: text/plain, Size: 6767 bytes --]

Hi Joe Robertson,

Thanks for the link.

In the xsa_thread function, can u try changing the hardcoded coded value 
"2" to "xsa_cur_req->current_nr_sectors " 


The actual code in the given link.

for(i = xsa_cur_req->current_nr_sectors; i > 0; i-=2){
+			xsa_device.req_done = 1;
+			while ((stat = cur_req(&SysAce, sector,
+					2,
+					buffer)) == XST_DEVICE_BUSY)
+				xsa_short_delay();


Try changing it to ...

for(i = xsa_cur_req->current_nr_sectors; i > 0; 
i-=xsa_cur_req->current_nr_sectors ){ xsa_device.req_done = 1;
while ((stat = cur_req(&SysAce, sector,
                                     xsa_cur_req->current_nr_sectors ,
                                    buffer)) == XST_DEVICE_BUSY)
                xsa_short_delay();



Due to the hardcoded value, it gave problem while mounting but no issue 
with fdisk. It mounts well but generated a kernel BUG. Tried changing 
the value to '1' from '2' , fdisk crashed but mount is working well. So 
removed the hardcode value and then placed the dynamic variable 
xsa_cur_req->current_nr_sectors which is chosen by kernel. And now fdisk 
and mount both are working fine.


Pl let me know the results in your setup.

Thanks
Sudheer


Robertson, Joseph M. wrote:
>
> Hi,
>
> Yes, I got it from here.
> http://www.cs.york.ac.uk/rtslab/demos/amos/xupv2pro/patches/linuxppc-2.6.17.1-sysace-1.2.patch
>
> The 'official' one, yes?
>
> Thanks,
>
> Joe Robertson
> Joseph.Robertson@sanmina-sci.com
>
>
>
> -----Original Message-----
> From: urwithsudheer [mailto:urwithsudheer@gmail.com]
> Sent: Fri 7/13/2007 4:25 AM
> To: Robertson, Joseph M.
> Cc: linuxppc-embedded@ozlabs.org
> Subject: Re: XSysAce driver cant mount DOS part
>
> Hi
>
> Robertson, Joseph M. wrote:
> >
> > Hi all,
> >
> > I've been workig with this for a while but have made no progress.
> > Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied
> > it to get clean code.
> > I inherited the previous code from another developer.
> >
> Can you send the link to xsysace driver source code from where you 
> obtained.
>
>
> Thanks
> Sudheer
>
>
> >
> > My problem is that mounting the DOS partition always fails in a short
> > time with a kernel oops.
> >
> > ECAU-9999:# Oops: kernel access of bad area, sig: 11
> > [#1]                     
> > 
> PREEMPT                                                                       
> > NIP: C00701C8 LR: C0070C18 CTR:
> > 00000000                                      
> > REGS: c0391dd0 TRAP: 0300   Not tainted 
> > (2.6.17.1)                           
> > MSR: 00021030 <ME,IR,DR>  CR: 22028082  XER:
> > 0000000B                         
> > DAR: 00000000, DSISR:
> > 00800000                                                
> > TASK = c0373030[4] 'events/0' THREAD:
> > c0390000                                
> > GPR00: 00000080 C0391E80 C0373030 C02CAC00 C0E03000 C0E03154 00000000
> > C02CAC00
> > GPR08: 00200200 00000000 00100100 00000000 00051A4B FFFFDE60 03BD4900
> > 007FFF3B
> > GPR16: 00400000 00000001 FFFFFFFF 03BCDC58 00000000 007FFF00 00000002
> > C0280000
> > GPR24: C0363A10 0000000B 00000000 00000000 00000000 C02CAC00 C035ED20
> > C0E03000
> > NIP [C00701C8]
> > free_block+0x8c/0x138                                          
> > LR [C0070C18]
> > drain_array+0xb8/0x124                                          
> > Call Trace:                                 
> >
> > The setup:
> > My own build system.
> > Kernel 2.6.17.1 with lots of xilinx stuff, eth, i2c, xsysace. 
> > Crosscompiled for PPC405.
> > Latest, clean XSysAce code.  mods:  major hardcoded to = 125.  Polled
> > mode.
> > CF:  3 partitions,
> > 1:  DOS FAT16
> > 2:  Ext2  main
> > 3:  Ext2  rescue
> >
> > This build boots up fine, mounts a ext2 as root fine.  I can also
> > mount the rescue partition with no problems.
> >
> > Does anyone have any pointers of where I should look for problems?
> >
> > My next step is to go and set it up for interrupt service and see if
> > that changes anything.
> >
> > Thanks,
> >
> > Joe Robertson
> > Joseph.Robertson@sanmina-sci.com
> >
> >
> > CONFIDENTIALITY
> > This e-mail message and any attachments thereto, is intended only for
> > use by the addressee(s) named herein and may contain legally
> > privileged and/or confidential information. If you are not the
> > intended recipient of this e-mail message, you are hereby notified
> > that any dissemination, distribution or copying of this e-mail
> > message, and any attachments thereto, is strictly prohibited. If you
> > have received this e-mail message in error, please immediately notify
> > the sender and permanently delete the original and any copies of this
> > email and any prints thereof.
> > ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL
> > IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the
> > Uniform Electronic Transactions Act or the applicability of any other
> > law of similar substance and effect, absent an express statement to
> > the contrary hereinabove, this e-mail message its contents, and any
> > attachments hereto are not intended to represent an offer or
> > acceptance to enter into a contract and are not otherwise intended to
> > bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries),
> > or any other person or entity.
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Linuxppc-embedded mailing list
> > Linuxppc-embedded@ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
>
>
> CONFIDENTIALITY
> This e-mail message and any attachments thereto, is intended only for 
> use by the addressee(s) named herein and may contain legally 
> privileged and/or confidential information. If you are not the 
> intended recipient of this e-mail message, you are hereby notified 
> that any dissemination, distribution or copying of this e-mail 
> message, and any attachments thereto, is strictly prohibited. If you 
> have received this e-mail message in error, please immediately notify 
> the sender and permanently delete the original and any copies of this 
> email and any prints thereof.
> ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL 
> IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the 
> Uniform Electronic Transactions Act or the applicability of any other 
> law of similar substance and effect, absent an express statement to 
> the contrary hereinabove, this e-mail message its contents, and any 
> attachments hereto are not intended to represent an offer or 
> acceptance to enter into a contract and are not otherwise intended to 
> bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), 
> or any other person or entity.


[-- Attachment #2: Type: text/html, Size: 10945 bytes --]

RE: XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

[-- Attachment #1: Type: text/plain, Size: 9982 bytes --]

Hi,

Thanks for your insight into the older code. 
I tried your fix and came up with this.
I have run e2fsck and the cf card comes up clean with that.

heres a boot sequence:

Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0x40421003 (irq = 4) is a 16550A
serial8250.0: ttyS1 at MMIO 0x40401003 (irq = 5) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 65536K size 1024 blocksize
XSysAce driver  v0771.
IDENTIFY: heads: 16, nsec: 63, cyls: 1011, size= 1019088
REGISTERED: major no.= 125 capacity= 1019088
 xsa: xsa1 xsa2 xsa3
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
mice: PS/2 mouse device common for all mice
TCP bic registered
NET: Registered protocol family 1
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 100k init
EXT2-fs error (device xsa2): ext2_check_page: bad entry in directory #32689: unaligned directory entry - offset=1024, inode=1713398885, rec_len=29295, name_len=109
Warning: unable to open an initial console.
init has generated signal 11 but has no handler for it
Kernel panic - not syncing: Attempted to kill init!


The only thing I notice is that the disk capacity is wrong, its a 512Mb, not a 1Gb as shown.

Any thoughts about what to look into next?

Thanks a lot.


Joe Robertson
Joseph.Robertson@sanmina-sci.com



-----Original Message-----
From: urwithsudheer [mailto:urwithsudheer@gmail.com]
Sent: Mon 7/16/2007 12:08 AM
To: Robertson, Joseph M.
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: XSysAce driver cant mount DOS part
 
Hi Joe Robertson,

Thanks for the link.

In the xsa_thread function, can u try changing the hardcoded coded value 
"2" to "xsa_cur_req->current_nr_sectors " 


The actual code in the given link.

for(i = xsa_cur_req->current_nr_sectors; i > 0; i-=2){
+			xsa_device.req_done = 1;
+			while ((stat = cur_req(&SysAce, sector,
+					2,
+					buffer)) == XST_DEVICE_BUSY)
+				xsa_short_delay();


Try changing it to ...

for(i = xsa_cur_req->current_nr_sectors; i > 0; 
i-=xsa_cur_req->current_nr_sectors ){ xsa_device.req_done = 1;
while ((stat = cur_req(&SysAce, sector,
                                     xsa_cur_req->current_nr_sectors ,
                                    buffer)) == XST_DEVICE_BUSY)
                xsa_short_delay();



Due to the hardcoded value, it gave problem while mounting but no issue 
with fdisk. It mounts well but generated a kernel BUG. Tried changing 
the value to '1' from '2' , fdisk crashed but mount is working well. So 
removed the hardcode value and then placed the dynamic variable 
xsa_cur_req->current_nr_sectors which is chosen by kernel. And now fdisk 
and mount both are working fine.


Pl let me know the results in your setup.

Thanks
Sudheer


Robertson, Joseph M. wrote:
>
> Hi,
>
> Yes, I got it from here.
> http://www.cs.york.ac.uk/rtslab/demos/amos/xupv2pro/patches/linuxppc-2.6.17.1-sysace-1.2.patch
>
> The 'official' one, yes?
>
> Thanks,
>
> Joe Robertson
> Joseph.Robertson@sanmina-sci.com
>
>
>
> -----Original Message-----
> From: urwithsudheer [mailto:urwithsudheer@gmail.com]
> Sent: Fri 7/13/2007 4:25 AM
> To: Robertson, Joseph M.
> Cc: linuxppc-embedded@ozlabs.org
> Subject: Re: XSysAce driver cant mount DOS part
>
> Hi
>
> Robertson, Joseph M. wrote:
> >
> > Hi all,
> >
> > I've been workig with this for a while but have made no progress.
> > Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied
> > it to get clean code.
> > I inherited the previous code from another developer.
> >
> Can you send the link to xsysace driver source code from where you 
> obtained.
>
>
> Thanks
> Sudheer
>
>
> >
> > My problem is that mounting the DOS partition always fails in a short
> > time with a kernel oops.
> >
> > ECAU-9999:# Oops: kernel access of bad area, sig: 11
> > [#1]                     
> > 
> PREEMPT                                                                       
> > NIP: C00701C8 LR: C0070C18 CTR:
> > 00000000                                      
> > REGS: c0391dd0 TRAP: 0300   Not tainted 
> > (2.6.17.1)                           
> > MSR: 00021030 <ME,IR,DR>  CR: 22028082  XER:
> > 0000000B                         
> > DAR: 00000000, DSISR:
> > 00800000                                                
> > TASK = c0373030[4] 'events/0' THREAD:
> > c0390000                                
> > GPR00: 00000080 C0391E80 C0373030 C02CAC00 C0E03000 C0E03154 00000000
> > C02CAC00
> > GPR08: 00200200 00000000 00100100 00000000 00051A4B FFFFDE60 03BD4900
> > 007FFF3B
> > GPR16: 00400000 00000001 FFFFFFFF 03BCDC58 00000000 007FFF00 00000002
> > C0280000
> > GPR24: C0363A10 0000000B 00000000 00000000 00000000 C02CAC00 C035ED20
> > C0E03000
> > NIP [C00701C8]
> > free_block+0x8c/0x138                                          
> > LR [C0070C18]
> > drain_array+0xb8/0x124                                          
> > Call Trace:                                 
> >
> > The setup:
> > My own build system.
> > Kernel 2.6.17.1 with lots of xilinx stuff, eth, i2c, xsysace. 
> > Crosscompiled for PPC405.
> > Latest, clean XSysAce code.  mods:  major hardcoded to = 125.  Polled
> > mode.
> > CF:  3 partitions,
> > 1:  DOS FAT16
> > 2:  Ext2  main
> > 3:  Ext2  rescue
> >
> > This build boots up fine, mounts a ext2 as root fine.  I can also
> > mount the rescue partition with no problems.
> >
> > Does anyone have any pointers of where I should look for problems?
> >
> > My next step is to go and set it up for interrupt service and see if
> > that changes anything.
> >
> > Thanks,
> >
> > Joe Robertson
> > Joseph.Robertson@sanmina-sci.com
> >
> >
> > CONFIDENTIALITY
> > This e-mail message and any attachments thereto, is intended only for
> > use by the addressee(s) named herein and may contain legally
> > privileged and/or confidential information. If you are not the
> > intended recipient of this e-mail message, you are hereby notified
> > that any dissemination, distribution or copying of this e-mail
> > message, and any attachments thereto, is strictly prohibited. If you
> > have received this e-mail message in error, please immediately notify
> > the sender and permanently delete the original and any copies of this
> > email and any prints thereof.
> > ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL
> > IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the
> > Uniform Electronic Transactions Act or the applicability of any other
> > law of similar substance and effect, absent an express statement to
> > the contrary hereinabove, this e-mail message its contents, and any
> > attachments hereto are not intended to represent an offer or
> > acceptance to enter into a contract and are not otherwise intended to
> > bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries),
> > or any other person or entity.
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Linuxppc-embedded mailing list
> > Linuxppc-embedded@ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
>
>
> CONFIDENTIALITY
> This e-mail message and any attachments thereto, is intended only for 
> use by the addressee(s) named herein and may contain legally 
> privileged and/or confidential information. If you are not the 
> intended recipient of this e-mail message, you are hereby notified 
> that any dissemination, distribution or copying of this e-mail 
> message, and any attachments thereto, is strictly prohibited. If you 
> have received this e-mail message in error, please immediately notify 
> the sender and permanently delete the original and any copies of this 
> email and any prints thereof.
> ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL 
> IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the 
> Uniform Electronic Transactions Act or the applicability of any other 
> law of similar substance and effect, absent an express statement to 
> the contrary hereinabove, this e-mail message its contents, and any 
> attachments hereto are not intended to represent an offer or 
> acceptance to enter into a contract and are not otherwise intended to 
> bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), 
> or any other person or entity.



CONFIDENTIALITY
This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited.  If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof.
ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING.  Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity.

[-- Attachment #2: Type: text/html, Size: 15511 bytes --]

RE: XSysAce driver cant mount DOS part

[Robertson, Joseph M.]

[-- Attachment #1: Type: text/plain, Size: 11701 bytes --]

I am sorry, I found a mistake on my part.

I fixed the code 'exactly' as you stated and I believe it is now working.
You are now in my credits page!

Extensive testing will now occur.

Thank you very much.


Joe Robertson
x8259
Joseph.Robertson@sanmina-sci.com



-----Original Message-----
From: linuxppc-embedded-bounces+joseph.robertson=sanmina-sci.com@ozlabs.org on behalf of Robertson, Joseph M.
Sent: Mon 7/16/2007 11:19 AM
To: urwithsudheer
Cc: linuxppc-embedded@ozlabs.org
Subject: RE: XSysAce driver cant mount DOS part
 
Hi,

Thanks for your insight into the older code. 
I tried your fix and came up with this.
I have run e2fsck and the cf card comes up clean with that.

heres a boot sequence:

Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0x40421003 (irq = 4) is a 16550A
serial8250.0: ttyS1 at MMIO 0x40401003 (irq = 5) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 65536K size 1024 blocksize
XSysAce driver  v0771.
IDENTIFY: heads: 16, nsec: 63, cyls: 1011, size= 1019088
REGISTERED: major no.= 125 capacity= 1019088
 xsa: xsa1 xsa2 xsa3
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
mice: PS/2 mouse device common for all mice
TCP bic registered
NET: Registered protocol family 1
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 100k init
EXT2-fs error (device xsa2): ext2_check_page: bad entry in directory #32689: unaligned directory entry - offset=1024, inode=1713398885, rec_len=29295, name_len=109
Warning: unable to open an initial console.
init has generated signal 11 but has no handler for it
Kernel panic - not syncing: Attempted to kill init!


The only thing I notice is that the disk capacity is wrong, its a 512Mb, not a 1Gb as shown.

Any thoughts about what to look into next?

Thanks a lot.


Joe Robertson
Joseph.Robertson@sanmina-sci.com



-----Original Message-----
From: urwithsudheer [mailto:urwithsudheer@gmail.com]
Sent: Mon 7/16/2007 12:08 AM
To: Robertson, Joseph M.
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: XSysAce driver cant mount DOS part
 
Hi Joe Robertson,

Thanks for the link.

In the xsa_thread function, can u try changing the hardcoded coded value 
"2" to "xsa_cur_req->current_nr_sectors " 


The actual code in the given link.

for(i = xsa_cur_req->current_nr_sectors; i > 0; i-=2){
+			xsa_device.req_done = 1;
+			while ((stat = cur_req(&SysAce, sector,
+					2,
+					buffer)) == XST_DEVICE_BUSY)
+				xsa_short_delay();


Try changing it to ...

for(i = xsa_cur_req->current_nr_sectors; i > 0; 
i-=xsa_cur_req->current_nr_sectors ){ xsa_device.req_done = 1;
while ((stat = cur_req(&SysAce, sector,
                                     xsa_cur_req->current_nr_sectors ,
                                    buffer)) == XST_DEVICE_BUSY)
                xsa_short_delay();



Due to the hardcoded value, it gave problem while mounting but no issue 
with fdisk. It mounts well but generated a kernel BUG. Tried changing 
the value to '1' from '2' , fdisk crashed but mount is working well. So 
removed the hardcode value and then placed the dynamic variable 
xsa_cur_req->current_nr_sectors which is chosen by kernel. And now fdisk 
and mount both are working fine.


Pl let me know the results in your setup.

Thanks
Sudheer


Robertson, Joseph M. wrote:
>
> Hi,
>
> Yes, I got it from here.
> http://www.cs.york.ac.uk/rtslab/demos/amos/xupv2pro/patches/linuxppc-2.6.17.1-sysace-1.2.patch
>
> The 'official' one, yes?
>
> Thanks,
>
> Joe Robertson
> Joseph.Robertson@sanmina-sci.com
>
>
>
> -----Original Message-----
> From: urwithsudheer [mailto:urwithsudheer@gmail.com]
> Sent: Fri 7/13/2007 4:25 AM
> To: Robertson, Joseph M.
> Cc: linuxppc-embedded@ozlabs.org
> Subject: Re: XSysAce driver cant mount DOS part
>
> Hi
>
> Robertson, Joseph M. wrote:
> >
> > Hi all,
> >
> > I've been workig with this for a while but have made no progress.
> > Today I got the latest XSysAce patch for kernel 2.6.17.1 and applied
> > it to get clean code.
> > I inherited the previous code from another developer.
> >
> Can you send the link to xsysace driver source code from where you 
> obtained.
>
>
> Thanks
> Sudheer
>
>
> >
> > My problem is that mounting the DOS partition always fails in a short
> > time with a kernel oops.
> >
> > ECAU-9999:# Oops: kernel access of bad area, sig: 11
> > [#1]                     
> > 
> PREEMPT                                                                       
> > NIP: C00701C8 LR: C0070C18 CTR:
> > 00000000                                      
> > REGS: c0391dd0 TRAP: 0300   Not tainted 
> > (2.6.17.1)                           
> > MSR: 00021030 <ME,IR,DR>  CR: 22028082  XER:
> > 0000000B                         
> > DAR: 00000000, DSISR:
> > 00800000                                                
> > TASK = c0373030[4] 'events/0' THREAD:
> > c0390000                                
> > GPR00: 00000080 C0391E80 C0373030 C02CAC00 C0E03000 C0E03154 00000000
> > C02CAC00
> > GPR08: 00200200 00000000 00100100 00000000 00051A4B FFFFDE60 03BD4900
> > 007FFF3B
> > GPR16: 00400000 00000001 FFFFFFFF 03BCDC58 00000000 007FFF00 00000002
> > C0280000
> > GPR24: C0363A10 0000000B 00000000 00000000 00000000 C02CAC00 C035ED20
> > C0E03000
> > NIP [C00701C8]
> > free_block+0x8c/0x138                                          
> > LR [C0070C18]
> > drain_array+0xb8/0x124                                          
> > Call Trace:                                 
> >
> > The setup:
> > My own build system.
> > Kernel 2.6.17.1 with lots of xilinx stuff, eth, i2c, xsysace. 
> > Crosscompiled for PPC405.
> > Latest, clean XSysAce code.  mods:  major hardcoded to = 125.  Polled
> > mode.
> > CF:  3 partitions,
> > 1:  DOS FAT16
> > 2:  Ext2  main
> > 3:  Ext2  rescue
> >
> > This build boots up fine, mounts a ext2 as root fine.  I can also
> > mount the rescue partition with no problems.
> >
> > Does anyone have any pointers of where I should look for problems?
> >
> > My next step is to go and set it up for interrupt service and see if
> > that changes anything.
> >
> > Thanks,
> >
> > Joe Robertson
> > Joseph.Robertson@sanmina-sci.com
> >
> >
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CONFIDENTIALITY
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