Re: [stable PATCH] iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsets

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Jul 23, 2013 at 10:06:02AM -0700, Greg KH wrote:
> On Mon, Jul 08, 2013 at 01:06:14PM -0400, Neil Horman wrote:
> > A few years back intel published a spec update:
> > http://www.intel.com/content/dam/doc/specification-update/5520-and-5500-chipset-ioh-specification-update.pdf
> > 
> > For the 5520 and 5500 chipsets which contained an errata (specificially errata
> > 53), which noted that these chipsets can't properly do interrupt remapping, and
> > as a result the recommend that interrupt remapping be disabled in bios.  While
> > many vendors have a bios update to do exactly that, not all do, and of course
> > not all users update their bios to a level that corrects the problem.  As a
> > result, occasionally interrupts can arrive at a cpu even after affinity for that
> > interrupt has be moved, leading to lost or spurrious interrupts (usually
> > characterized by the message:
> > kernel: do_IRQ: 7.71 No irq handler for vector (irq -1)
> > 
> > There have been several incidents recently of people seeing this error, and
> > investigation has shown that they have system for which their BIOS level is such
> > that this feature was not properly turned off.  As such, it would be good to
> > give them a reminder that their systems are vulnurable to this problem.  For
> > details of those that reported the problem, please see:
> > https://bugzilla.redhat.com/show_bug.cgi?id=887006
> > 
> > [ Joerg: Removed CONFIG_IRQ_REMAP ifdef from early-quirks.c ]
> > 
> > Notes: Modified early-quirks.c to include linux/irq.h, to fix warnings.  This
> > isn't needed in the upstream tree
> > 
> > Signed-off-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
> > CC: Prarit Bhargava <prarit@xxxxxxxxxx>
> > CC: Don Zickus <dzickus@xxxxxxxxxx>
> > CC: Don Dutile <ddutile@xxxxxxxxxx>
> > CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> > CC: Asit Mallick <asit.k.mallick@xxxxxxxxx>
> > CC: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
> > CC: linux-pci@xxxxxxxxxxxxxxx
> > CC: Joerg Roedel <joro@xxxxxxxxxx>
> > CC: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > CC: Arkadiusz Miśkiewicz <arekm@xxxxxxxx>
> > CC: Jean Delvare <jdelvare@xxxxxxx>
> > CC: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
> > Signed-off-by: Joerg Roedel <joro@xxxxxxxxxx>
> > (cherry picked from commit 03bbcb2e7e292838bb0244f5a7816d194c911d62)
> 
> As 3.9-stable is now dead, this one missed that window, sorry about
> that.
> 
Thanks for the heads up, we tried our best :).
Neil

> greg k-h
> 
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]