XSysAce driver cant mount DOS part

Robertson, Joseph M. joseph.robertson at sanmina-sci.com
Fri Jul 13 04:03:03 EST 2007

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 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]                       
NIP: C00701C8 LR: C0070C18 CTR: 00000000                                        
REGS: c0391dd0 TRAP: 0300   Not tainted  (                             
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 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.

Joe Robertson
Joseph.Robertson at sanmina-sci.com

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