Bug 14375 - Intel(R) I/OAT DMA Engine init failed
Summary: Intel(R) I/OAT DMA Engine init failed
Status: CLOSED UNREPRODUCIBLE
Alias: None
Product: Drivers
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_other
URL:
Keywords:
Depends on:
Blocks: 14230
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Reported: 2009-10-11 20:38 UTC by Rafael J. Wysocki
Modified: 2010-02-22 12:56 UTC (History)
1 user (show)

See Also:
Kernel Version: 2.6.32-rc1
Subsystem:
Regression: Yes
Bisected commit-id:

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Description Rafael J. Wysocki 2009-10-11 20:38:16 UTC 
Subject    : 2.6.32-rc2: Intel(R) I/OAT DMA Engine init failed
Submitter  : Alexander Beregalov <a.beregalov@gmail.com>
Date       : 2009-10-02 9:46
References : http://marc.info/?l=linux-kernel&m=125447680016160&w=4
Handled-By : Dan Williams <dan.j.williams@intel.com>
Patch      : http://patchwork.kernel.org/patch/51808/

This entry is being used for tracking a regression from 2.6.31.  Please don't
close it until the problem is fixed in the mainline.
Comment 1 Rafael J. Wysocki 2009-10-26 22:09:32 UTC 
On Monday 26 October 2009, Alexander Beregalov wrote:
> 2009/10/26 Rafael J. Wysocki <rjw@sisk.pl>:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.31.  Please verify if it still should be listed and let me know
> > (either way).
> >
> >
> > Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=14375
> > Subject         : Intel(R) I/OAT DMA Engine init failed
> > Submitter       : Alexander Beregalov <a.beregalov@gmail.com>
> > Date            : 2009-10-02 9:46 (25 days old)
> > References      : http://marc.info/?l=linux-kernel&m=125447680016160&w=4
> > Handled-By      : Dan Williams <dan.j.williams@intel.com>
> > Patch           : http://patchwork.kernel.org/patch/51808/
> 
> When I patch reiserfs the bug goes to libata, it means ioatdma works
> and libata does not. It looks like inaccurate work with memory
> somewhere, but I do not know how to find it.
> I cannot reproduce it since 2.6.32-rc3 and I do not see any bugs since then.
Comment 2 a1bert 2010-02-22 12:56:56 UTC 
well, we have just upgraded from 2.6.28 to 2.6.32.8, no hw/bios change, just reboot (cold tested too). ioatdma stopped working:


ioatdma: Intel(R) QuickData Technology Driver 4.00
ioatdma 0000:00:16.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
ioatdma 0000:00:16.0: setting latency timer to 64
ioatdma 0000:00:16.0: channel error register unreachable
ioatdma 0000:00:16.0: channel enumeration error
ioatdma 0000:00:16.0: Intel(R) I/OAT DMA Engine init failed
ioatdma 0000:00:16.0: PCI INT A disabled
ioatdma 0000:00:16.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17
ioatdma 0000:00:16.1: setting latency timer to 64
ioatdma 0000:00:16.1: channel error register unreachable
ioatdma 0000:00:16.1: channel enumeration error
ioatdma 0000:00:16.1: Intel(R) I/OAT DMA Engine init failed
..
..
..
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