[Bugme-new] [Bug 10752] New: pata_isapnp driver causes the ata layer to go splat

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=10752

           Summary: pata_isapnp driver causes the ata layer to go splat
           Product: IO/Storage
           Version: 2.5
     KernelVersion: 2.6.25
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Serial ATA
        AssignedTo: jgarzik at pobox.com
        ReportedBy: arjan at linux.intel.com


This happens quite a bit based on Fedora 9 feedback, but already happened in
2.6.24 and possibly earlier.

http://www.kerneloops.org/search.php?search=bad_io_access

shows the basic backtrace:
*bad_io_access
ioread8
ata_altstatus
ata_std_dev_select
ata_dev_select
ata_qc_issue_prot
ata_qc_issue
ata_exec_internal_sg
ata_exec_internal
ata_dev_read_id
ata_eh_recover
ata_do_eh
ata_bmdma_drive_eh
ata_bmdma_error_handler
ata_scsi_error
scsi_error_handler
kthread
kernel_thread_helper

in all cases, this happens while pata_isapnp is being loaded; so it's not
unlikely that this driver stomps on some other driver which then goes splat


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