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    SubjectRe: [BUG] linux-next: Tree for March 25 kernel oops, when loading mpt fusion driver - regression
    On Thu, 2008-06-26 at 15:38 -0500, David Teigland wrote:
    > On Wed, Mar 26, 2008 at 12:14:00PM +0530, Kamalesh Babulal wrote:
    > > Hi Stephen,
    > >
    > > Kernel bug is hit while booting up the next-20080325 kernel with MPT
    > > Fusion driver built in.This was reported previously for the
    > > next-20080320 kernel
    > >
    > Hi, did you ever get this fixed? I've been having the same problem,
    > still exists on 2.6.26-rc8 for me,
    > Loading scsi_transport_spi.ko module
    > Loading mptscsih.ko module
    > Loading mptspi.ko module
    > Fusion MPT SPI Host driver 3.04.06
    > ACPI: PCI Interrupt 0000:86:01.0[A] -> GSI 32 (level, low) -> IRQ 32
    > mptbase: ioc0: Initiating bringup
    > ioc0: LSI53C1030 B2: Capabilities={Initiator,Target}
    > mptbase: ioc0: PCI-MSI enabled

    I speculate that this might be related to the problem. The fusion
    driver was recently flipped to default to MSI enable (previously it had
    disabled them). Could you boot it with the fusion module parameter


    if it actually boots that will be a good confirmation that MSI is to

    > mptbase: ioc0: Initiating recovery

    This I suspect is because of a lost interrupt.

    > BUG: unable to handle kernel NULL pointer dereference at 0000000000000948

    And this one looks to be a second bug: The MSI fault path is actually
    causing this oops.


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