Messages in this thread | | | Date | Fri, 06 Feb 2009 20:46:51 +0300 | From | Sergei Shtylyov <> | Subject | Re: [PATCH] [resend] Resume from hibernation fails with pata_it821x RAID volume |
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Ondrej Zary wrote:
> hibernation didn't work for me since I started to use IT8212 controller. Now I > did some debugging (booting with no_console_suspend init=/bin/sh).
> Found that resume fails (2.6.28) with "serial number mismatch 'some > garbage' != 'some other garbage'" and "revalidation failed" messages. That's > because the controller firmware fills different serial number in the IDENTIFY > every boot.
> The patch below fixes the resume simply clearing the serial number. The proper > fix would be probably to fill in the serial number of the RAID volume > instead.
I wonder why they just don't put it there (if they indeed have such number). If I don't mistake, this is a RAID disk?
> I assume that there must be something like that stored on the drives > but I don't know where.
> Fix resume on pata_it821x RAID volume by clearing the serial number in > IDENTIFY data, which is otherwise different on each boot.
> Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
> --- linux-2.6.28-orig/drivers/ata/pata_it821x.c 2009-01-02 17:18:36.000000000 > +0100 > +++ linux/drivers/ata/pata_it821x.c 2009-02-02 17:47:57.000000000 +0100 > @@ -561,6 +561,9 @@ > id[83] |= 0x4400; /* Word 83 is valid and LBA48 */ > id[86] |= 0x0400; /* LBA48 on */ > id[ATA_ID_MAJOR_VER] |= 0x1F; > + /* Clear the serial number because it's different each boot > + which breaks validation on resume */
See CodingStyle chapter 8 for the preferred multiline comment style.
> + memset(&id[ATA_ID_SERNO], 0x20, ATA_ID_SERNO_LEN);
Why not ' '?
MBR, Sergei
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