Comment 8 for bug 256316

In the changelog for 2.6.27-rc7 is the following text. If there's a new kernel to try, let me know.

commit 62ff2ecf7a4e69f7271b7f7a57aaee76ffe610f2
Author: Masoud Sharbiani <email address hidden>
Date: Wed Sep 10 22:22:34 2008 +0200

    ide: Fix pointer arithmetic in hpt3xx driver code (3rd try)

    git commit 74811f355f4f69a187fa74892dcf2a684b84ce99 causes crash at
    module load (or boot) time on my machine with a hpt374 controller.
    The reason for this is that for initializing second controller which sets
    (hwif->dev == host->dev[1]) to true (1), adds 1 to a void ptr, which
    advances it by one byte instead of advancing it by sizeof(hpt_info) bytes.
    Because of this, all initialization functions get corrupted data in info
    variable which causes a crash at boot time.

    This patch fixes that and makes my machine boot again.

    The card itself is a HPT374 raid conroller: Here is the lspci -v output:
    03:06.0 RAID bus controller: HighPoint Technologies, Inc. HPT374 (rev
    07)
            Subsystem: HighPoint Technologies, Inc. Unknown device 0001
            Flags: bus master, 66MHz, medium devsel, latency 120, IRQ 28
            I/O ports at 8000 [size=8]
            I/O ports at 7800 [size=4]
            I/O ports at 7400 [size=8]
            I/O ports at 7000 [size=4]
            I/O ports at 6800 [size=256]
            Expansion ROM at fe8e0000 [disabled] [size=128K]
            Capabilities: [60] Power Management version 2

    03:06.1 RAID bus controller: HighPoint Technologies, Inc. HPT374 (rev
    07)
            Subsystem: HighPoint Technologies, Inc. Unknown device 0001
            Flags: bus master, 66MHz, medium devsel, latency 120, IRQ 28
            I/O ports at 9800 [size=8]
            I/O ports at 9400 [size=4]
            I/O ports at 9000 [size=8]
            I/O ports at 8800 [size=4]
            I/O ports at 8400 [size=256]
            Capabilities: [60] Power Management version 2

    Signed-off-by: Masoud Sharbiani <email address hidden>
    Cc: Sergei Shtylyov <email address hidden>
    Cc: Andrew Morton <email address hidden>
    [bart: use dev_get_drvdata() per Sergei's suggestion]
    Signed-off-by: Bartlomiej Zolnierkiewicz <email address hidden>