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New: pata_isapnp driver causes the ata layer to go splat

Bugme-new Andrew Morton 2 participants 2 messages May 19, 2008 – May 20, 2008 1 message not in the archive libata

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Andrew Morton

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#1 lore raw
Quoted 42 lines · On Mon, 19 May 2008 14:46:08 -0700 (PDT) [email protected] wrote:

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: [email protected]
ReportedBy: [email protected]

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

Quoted 3 lines

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

Unclear who maintains pata_isapnp?

#2 lore raw
Quoted 3 lines · On Mon, 19 May 2008 15:25:49 -0700 Andrew Morton <[email protected]>…
Quoted 1 line

Unclear who maintains pata_isapnp?

Alan is on top of this one; he sent a patch to Jeff Garzik already earlier today
(will attach to the BZ shortly)