ubi crash after change to read-only

[Esteban Lopez]

Hello Everybody, 

I have a ubifs over nandflash memory, my kernel version is 2.6.27, my uC
is an at91sam9260 by ATMEL and I created my ubi image with the following
commands:

>mkfs.ubifs -e 0x1F800 -c 2048 -m 0x800 -x zlib -r MY_RFS_PATH -o
myRFS.ubifs

 >ubinize -p 128KiB -m 2048 -s 512 -o myRFS.ubi myRFS-ubinize.cfg

>mkfs.ubifs -V
Version 1.2

> ubinize -V
1.0

My system run very well but after some days or months my rfs change
suddenly to read-only mode, then if I reboot the system, ubi fail during
its recovery process with this messanges

UBIFS: recovery
needed                                                          
[<c028f70c>] (dump_stack+0x0/0x14) from [<c011ea80>] (alloc_lpt_leb
+0xd0/0xd8)  
[<c011e9b0>] (alloc_lpt_leb+0x0/0xd8) from [<c011f554>]
(ubifs_lpt_start_commit+
0x50c/0x710)                                                                    
[<c011f048>] (ubifs_lpt_start_commit+0x0/0x710) from [<c0113a74>]
(do_commit+0xc
8/0x6f0)                                                                        
[<c01139ac>] (do_commit+0x0/0x6f0) from [<c0114128>] (ubifs_run_commit
+0x8c/0xa0
)                                                                               
 r8:c3819d28 r7:c3a04800 r6:0000056f r5:c392a0e4
r4:c392a000                    
[<c011409c>] (ubifs_run_commit+0x0/0xa0) from [<c011c6f4>]
(ubifs_rcvry_gc_commi
t
+0x218/0x228)                                                                  
 r5:c392a000
r4:00000000                                                        
[<c011c4dc>] (ubifs_rcvry_gc_commit+0x0/0x228) from [<c010a1b8>]
(ubifs_get_sb+0
xc18/0xf70)                                                                     
 r8:c3a04a00 r7:00000000 r6:0001f5d0 r5:00000001
r4:00000000                    
[<c01095a0>] (ubifs_get_sb+0x0/0xf70) from [<c0081fd0>] (vfs_kern_mount
+0x58/0xb
0)                                                                              
[<c0081f78>] (vfs_kern_mount+0x0/0xb0) from [<c0082084>] (do_kern_mount
+0x3c/0xd
8)                                                                              
 r8:c034388c r7:c3a5b000 r6:00000000 r5:c39ff000
r4:00008000                    
[<c0082048>] (do_kern_mount+0x0/0xd8) from [<c0097ff0>] (do_new_mount
+0x5c/0x84)
 r9:c3a5b000 r8:c39ff000 r7:c3819e98 r6:00000000
r5:00008000                    
r4:c3a5b000                                                                     
[<c0097f94>] (do_new_mount+0x0/0x84) from [<c0098cd8>] (do_mount
+0x170/0x198)   
 r7:c3819e98 r6:00000000 r5:00008000
r4:00000000                                
[<c0098b68>] (do_mount+0x0/0x198) from [<c0098d8c>] (sys_mount
+0x8c/0xd4)       
[<c0098d00>] (sys_mount+0x0/0xd4) from [<c0008c1c>] (do_mount_root
+0x28/0xb0)   
 r7:00008000 r6:c384f000 r5:c0024844
r4:c384f000                                
[<c0008bf4>] (do_mount_root+0x0/0xb0) from [<c0008ea4>]
(mount_block_root+0x100/
0x220)                                                                          

r4:c384f000                                                                    
[<c0008da4>] (mount_block_root+0x0/0x220) from [<c0009160>]
(prepare_namespace+0
xa0/0x1d0)                                                                      
 r8:00000000 r7:00000000 r6:00000000 r5:c0024844
r4:c0024854                    
[<c00090c0>] (prepare_namespace+0x0/0x1d0) from [<c0008464>]
(kernel_init+0xc8/0
xf4)                                                                            
 r5:00000000
r4:c0357920                                                        
[<c000839c>] (kernel_init+0x0/0xf4) from [<c0040260>] (do_exit
+0x0/0x6fc)       

r4:00000000                                                                    
UBIFS error (pid 1): do_commit: commit failed, error
-28                        
UBIFS warning (pid 1): ubifs_ro_mode: switched to read-only mode, error
-28     
VFS: Cannot open root device "ubi0:rootfs" or
unknown-block(0,0)                
Please append a correct "root=" boot option; here are the available
partitions: 
1f00      65536 mtdblock0
(driver?)                                             
1f01     458752 mtdblock1
(driver?)                                             
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)  
Rebooting in 5
seconds..RomBOOT                                                 
> 

I have always the same error . Is there some documented bug in kernel
about this or Could you tell me some idea about how debug or fix this?


Thankyou!