JFFS2 Error or Maybe Flash Driver Error

JFFS2 Error or Maybe Flash Driver Error

[Zhonglin]

Hi All,

I pulled the JFFS2 code from CVS.  And Ported 2.6.12-omap1 to p2-sample.
When P2 sample run for a while, Sometimes The following message will show.

But when I boot again, it is ok again. 

Does anybody meet the same problem ?


Node CRC 00800080 != calculated CRC 4bf2ff8d for node at 00676518
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9dfa60.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x0000059c)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9deb3c.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000f24)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9ddcbc.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000e80)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9dce64.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000e58)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9dbf3c.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000f28)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9db5dc.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000960)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9da914.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000cc8)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9d9c94.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000c80)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9d93c8.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x000008cc)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9d883c.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x00000b8c)
JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9d7f74.
But it must have been OK earl.Node totlen on flash (0x00800080) !=
totlen from node ref (0x000008c8)


In our kernel source code, FILE drivers/mtd/chips/cfi_cmdset_0001.c ,
we change like below to fix a bug.

static void cfi_intelext_resume(struct mtd_info *mtd)
{
    struct map_info *map = mtd->priv;
    struct cfi_private *cfi = map->fldrv_priv;
    int i;
    struct flchip *chip;

    for (i=0; i<cfi->numchips; i++) {

        chip = &cfi->chips[i];

        spin_lock(chip->mutex);

        /* Go to known state. Chip may have been power cycled */
        if (chip->state == FL_PM_SUSPENDED) {
            //map_write(map, CMD(0xFF), cfi->chips[i].start);  //@@@@@@@@@@@@@@@ It will report error!!!
            map_write(map, CMD(0xFF), 0);
            chip->oldstate = chip->state = FL_READY;
            wake_up(&chip->wq);
        }

        spin_unlock(chip->mutex);
    }
}


When our p2-sample enter the sleep mode, then resume , the resume code will be called. 

So could anyone give me to fix the bug ??



Thanks a lot!

zhonglin

Re: JFFS2 Error or Maybe Flash Driver Error

[Josh Boyer]

On Wed, 2005-09-28 at 16:31 +0800, Zhonglin wrote:
> Hi All,
> 
> I pulled the JFFS2 code from CVS.  And Ported 2.6.12-omap1 to p2-sample.
> When P2 sample run for a while, Sometimes The following message will show.
> 
> But when I boot again, it is ok again. 
> 
> Does anybody meet the same problem ?
> 
> 
> Node CRC 00800080 != calculated CRC 4bf2ff8d for node at 00676518
> JFFS2 notice: (247) read_unknown: node header CRC failed at 0x9dfa60.
> But it must have been OK earl.Node totlen on flash (0x00800080) !=
> totlen from node ref (0x0000059c)

I have seen this problem, yes.  Specifically, it has shown up when I try
to mount a JFFS2 filesystem as the rootfs.  When mounting it as a
non-rootfs, I haven't seen the problem.  I doubt that really makes a
difference though, and it's probably related more to timing than
anything.

> So could anyone give me to fix the bug ??

I haven't figure it out yet.  My particular case never has the resume
code called, so I'm not sure that's the problem.

josh

Re: JFFS2 Error or Maybe Flash Driver Error

[Artem B. Bityutskiy]

Josh Boyer wrote:
> I have seen this problem, yes.  Specifically, it has shown up when I try
> to mount a JFFS2 filesystem as the rootfs.  When mounting it as a
> non-rootfs, I haven't seen the problem.  I doubt that really makes a
> difference though, and it's probably related more to timing than
> anything.
Well, if you gather and send the full JFFS2 debugging log I may try to help.

-- 
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.