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    SubjectRe: [BUG] linux-next: Tree for April 10 - kernel panic while loading ata driver on powermac
    Jeff Garzik wrote:
    > Kamalesh Babulal wrote:
    >> Hi Stephen,
    >>
    >> The next-20080410 kernel panics while bootup over the PowerMac G5 box, while
    >> loading the ATA driver.
    >
    > IDE driver, you mean.
    >
    >
    >> [ 3.704000] NIP [c0000000000222a8] ._insw_ns+0x10/0x30
    >> [ 3.704000] LR [c00000000021cd10] .ata_input_data+0x1f4/0x264
    >> [ 3.704000] Call Trace:
    >
    >> [ 3.704000] [c0000002760db3b0] [c00000000021fc34] .try_to_identify+0x298/0x690
    >> [ 3.704000] [c0000002760db470] [c000000000220168] .do_probe+0x13c/0x2f0
    >> [ 3.704000] [c0000002760db510] [c00000000022059c] .ide_probe_port+0x280/0x670
    >> [ 3.704000] [c0000002760db5e0] [c000000000220d84] .ide_device_add_all+0x2f8/0x670
    >> [ 3.704000] [c0000002760db690] [c000000000221160] .ide_device_add+0x64/0x74
    >
    >> [ 3.704000] [c0000002760db930] [c00000000019241c] .pci_device_probe+0x10c/0x184
    >> [ 3.704000] [c0000002760db9e0] [c0000000002068ac] .driver_probe_device+0x120/0x1e4
    >> [ 3.704000] [c0000002760dba70] [c0000000002069d0] .__driver_attach+0x60/0xa4
    >> [ 3.704000] [c0000002760dbb00] [c0000000002050e8] .bus_for_each_dev+0x7c/0xcc
    >> [ 3.704000] [c0000002760dbbb0] [c000000000206388] .driver_attach+0x28/0x40
    >> [ 3.704000] [c0000002760dbc30] [c000000000206154] .bus_add_driver+0xd4/0x274
    >> [ 3.704000] [c0000002760dbcd0] [c000000000206f04] .driver_register+0x90/0x14c
    >> [ 3.704000] [c0000002760dbd70] [c000000000191c80] .__pci_register_driver+0x68/0xc8
    >> [ 3.704000] [c0000002760dbe10] [c0000000003ccfb8] .pmac_ide_probe+0x48/0x94
    >
    > Regards,
    >
    > Jeff
    Hi Jeff,

    Looking at the boot log before the kernel oops, I suspected it to be the ide driver causing
    the kernel oops, I am trying reproduce the crash with debug info compiled into the kernel.

    [ 2.236136] Uniform Multi-Platform E-IDE driver
    [ 2.248211] ide-pmac 0001:03:0d.0: enabling device (0014 -> 0016)
    [ 3.284006] ide0: Found Apple K2 ATA-6 controller, bus ID 3, irq 39
    [ 3.700012] Unable to handle kernel paging request for data at address 0xa0001000822fa000
    [ 3.704000] Faulting instruction address: 0xc0000000000222a8
    [ 3.704000] Oops: Kernel access of bad area, sig: 11 [#1]
    [ 3.704000] SMP NR_CPUS=32 NUMA PowerMac
    --
    Thanks & Regards,
    Kamalesh Babulal,
    Linux Technology Center,
    IBM, ISTL.


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