This is a note to let you know that I've just added the patch titled
iommu: Remove stack trace from broken irq remapping warning
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iommu-remove-stack-trace-from-broken-irq-remapping-warning.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 05104a4e8713b27291c7bb49c1e7e68b4e243571 Mon Sep 17 00:00:00 2001
From: Neil Horman <nhorman@xxxxxxxxxxxxx>
Date: Fri, 27 Sep 2013 12:53:35 -0400
Subject: iommu: Remove stack trace from broken irq remapping warning
From: Neil Horman <nhorman@xxxxxxxxxxxxx>
commit 05104a4e8713b27291c7bb49c1e7e68b4e243571 upstream.
The warning for the irq remapping broken check in intel_irq_remapping.c is
pretty pointless. We need the warning, but we know where its comming from, the
stack trace will always be the same, and it needlessly triggers things like
Abrt. This changes the warning to just print a text warning about BIOS being
broken, without the stack trace, then sets the appropriate taint bit. Since we
automatically disable irq remapping, theres no need to contiue making Abrt jump
at this problem
Signed-off-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
CC: Joerg Roedel <joro@xxxxxxxxxx>
CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
CC: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
CC: Sebastian Andrzej Siewior <sebastian@xxxxxxxxxxxxx>
Signed-off-by: Joerg Roedel <joro@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/intel_irq_remapping.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -525,12 +525,13 @@ static int __init intel_irq_remapping_su
if (disable_irq_remap)
return 0;
if (irq_remap_broken) {
- WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND,
- "This system BIOS has enabled interrupt remapping\n"
- "on a chipset that contains an erratum making that\n"
- "feature unstable. To maintain system stability\n"
- "interrupt remapping is being disabled. Please\n"
- "contact your BIOS vendor for an update\n");
+ printk(KERN_WARNING
+ "This system BIOS has enabled interrupt remapping\n"
+ "on a chipset that contains an erratum making that\n"
+ "feature unstable. To maintain system stability\n"
+ "interrupt remapping is being disabled. Please\n"
+ "contact your BIOS vendor for an update\n");
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
disable_irq_remap = 1;
return 0;
}
Patches currently in stable-queue which might be from nhorman@xxxxxxxxxxxxx are
queue-3.12/iommu-remove-stack-trace-from-broken-irq-remapping-warning.patch
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