[Bugme-new] [Bug 16639] New: All blocks of an older NAND device reported bad

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=16639

           Summary: All blocks of an older NAND device reported bad
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.36-rc1
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Flash/Memory Technology Devices
        AssignedTo: dwmw2 at infradead.org
        ReportedBy: jkrzyszt at tis.icnet.pl
        Regression: Yes


Latest changes to drivers/mtd/nand/nand-{base,bbt}.c break support for the
following device found on my ARM OMAP based Amstrad Delta videophone:

NAND device: Manufacturer ID: 0x98, Chip ID: 0x75 (Toshiba NAND 32MiB 3,3V
8-bit)

All blocks are detected bad, resulting in the device being not usable at all.

The problem has been introduced with the following commit:
mtd: nand: refactor BB marker detection
c7b28e25cb9beb943aead770ff14551b55fa8c79

Reverting it, plus two more that depend on it, corrects the problem for me.

Since I'm new to NAND, please give me a hint how I could try to correct it
other than reverting the commits, which I assume may be required by other, new
devices.

Thanks,
Janusz

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