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    SubjectRe: BUG in drivers/dma/ioat/dma_v2.c:314
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    On Thu, Jul 1, 2010 at 10:58 AM, Chris Li <lkml@chrisli.org> wrote:
    > On Thu, Jul 1, 2010 at 10:20 AM, Dan Williams <dan.j.williams@intel.com> wrote:
    >> Chris, attached is a combined patch with David's catch for the VT-d
    >> misconfiguration, and some code to more gracefully handle this init failure
    >> in the driver.  Can you see if this resolves the problem? (remove the prior
    >> patches I have sent).
    >
    > Thanks for the patch. I will test that and get back to you today.

    Sorry lost my machine last night again so I did not complete the test yesterday.

    modprobe ioatmda did not crash any more:

    ioatdma: Intel(R) QuickData Technology Driver 4.00
    ioatdma 0000:00:0f.0: can't derive routing for PCI INT A
    ioatdma 0000:00:0f.0: PCI INT A: no GSI
    ioatdma 0000:00:0f.0: setting latency timer to 64
    alloc irq_desc for 57 on node -1
    alloc kstat_irqs on node -1
    ioatdma 0000:00:0f.0: irq 57 for MSI/MSI-X
    alloc irq_desc for 58 on node -1
    alloc kstat_irqs on node -1
    ioatdma 0000:00:0f.0: irq 58 for MSI/MSI-X
    alloc irq_desc for 59 on node -1
    alloc kstat_irqs on node -1
    ioatdma 0000:00:0f.0: irq 59 for MSI/MSI-X
    alloc irq_desc for 60 on node -1
    alloc kstat_irqs on node -1
    ioatdma 0000:00:0f.0: irq 60 for MSI/MSI-X
    ioatdma 0000:00:0f.0: failed to start channel chanerr: 0x10
    ioatdma 0000:00:0f.0: Freeing 1 in use descriptors!
    ioatdma 0000:00:0f.0: selftest cannot allocate chan resource
    ioatdma 0000:00:0f.0: Intel(R) I/OAT DMA Engine init failed
    ioatdma 0000:00:0f.0: can't derive routing for PCI INT A

    But I don't see the line that print out BIOS is lying.

    Attach the full dmesg again here.

    Chris
    [unhandled content-type:application/octet-stream]
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