Bug 14375

Summary:	Intel(R) I/OAT DMA Engine init failed
Product:	Drivers	Reporter:	Rafael J. Wysocki (rjw)
Component:	Other	Assignee:	drivers_other
Status:	CLOSED UNREPRODUCIBLE
Severity:	normal	CC:	a1bert
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.32-rc1	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	14230

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
..
..
..