JFFS2 OOPS in 2.6.20

[Joakim Tjernlund]

On Fri, 2007-03-09 at 09:23 +0000, David Woodhouse wrote:
> On Fri, 2007-03-09 at 10:02 +0100, Joakim Tjernlund wrote:
> > JFFS2 notice: (137) read_unknown:  ref_flags(ref) == REF_UNCHECKED at 0x3aa6c6c.
> >  {0000,0000,00000000,00000000} 
> 
> Ouch. That CRC is actually "correct". It's why we should have used
> crc32(-1, buf, len) instead of crc32(0, buf, len) from the start.
> 
> Do you have any idea how you managed to get those zeroes on the flash?

Not much, our system test did power cycle testing while doing SW
upgrade(lots of writing of files).

Tested your patch and now it boots again with this :)
JFFS2 notice: (137) jffs2_get_inode_nodes: Node header CRC failed at 0x3aa87a0. 
{0040,4001,00000044,00000000}
JFFS2 error: (137) read_unknown: REF_UNCHECKED but unknown node at 0x3aa6c6c
JFFS2 error: (137) read_unknown: Node is {0000,0000,00000000,00000000}. Please report this error.
JFFS2 notice: (137) jffs2_get_inode_nodes: Node header CRC failed at 0x3aa517c. 
{0400,4001,00000000,00000004}
JFFS2 error: (137) read_unknown: REF_UNCHECKED but unknown node at 0x3aa28fc
JFFS2 error: (137) read_unknown: Node is {0000,0000,00000000,00000000}. Please report this error.
JFFS2 notice: (137) jffs2_get_inode_nodes: Node header CRC failed at 0x3aa1ef8. 
{0000,0000,00000000,00100400}
JFFS2 notice: (137) jffs2_get_inode_nodes: Node header CRC failed at 0x3aa1438. 
{0000,4000,00000000,00000000}
JFFS2 error: (137) read_unknown: REF_UNCHECKED but unknown node at 0x3aa0a44
JFFS2 error: (137) read_unknown: Node is {0000,0000,00000000,00000000}. Please report this error.
JFFS2 error: (137) read_unknown: REF_UNCHECKED but unknown node at 0x3aa3e84
JFFS2 error: (137) read_unknown: Node is {0000,0000,00000000,00000000}. Please report this error.
JFFS2 notice: (137) jffs2_get_inode_nodes: Node header CRC failed at 0x3aa3d80. 
{0040,4000,00000000,01000005}
JFFS2 error: (137) read_unknown: REF_UNCHECKED but unknown node at 0x3aa33c8
JFFS2 error: (137) read_unknown: Node is {0000,0000,00000000,00000000}. Please report this error.
VFS: Mounted root (jffs2 filesystem).

 Jocke