This is a note to let you know that I've just added the patch titled
powerpc: pSeries_lpar_hpte_remove fails from Adjunct partition being performed before the ANDCOND test
to the 3.4-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:
powerpc-pseries_lpar_hpte_remove-fails-from-adjunct-partition-being-performed-before-the-andcond-test.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9fb2640159f9d4f5a2a9d60e490482d4cbecafdb Mon Sep 17 00:00:00 2001
From: Michael Wolf <mjw@xxxxxxxxxxxxxxxxxx>
Date: Fri, 5 Apr 2013 10:41:40 +0000
Subject: powerpc: pSeries_lpar_hpte_remove fails from Adjunct partition being performed before the ANDCOND test
From: Michael Wolf <mjw@xxxxxxxxxxxxxxxxxx>
commit 9fb2640159f9d4f5a2a9d60e490482d4cbecafdb upstream.
Some versions of pHyp will perform the adjunct partition test before the
ANDCOND test. The result of this is that H_RESOURCE can be returned and
cause the BUG_ON condition to occur. The HPTE is not removed. So add a
check for H_RESOURCE, it is ok if this HPTE is not removed as
pSeries_lpar_hpte_remove is looking for an HPTE to remove and not a
specific HPTE to remove. So it is ok to just move on to the next slot
and try again.
Signed-off-by: Michael Wolf <mjw@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/pseries/lpar.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -187,7 +187,13 @@ static long pSeries_lpar_hpte_remove(uns
(0x1UL << 4), &dummy1, &dummy2);
if (lpar_rc == H_SUCCESS)
return i;
- BUG_ON(lpar_rc != H_NOT_FOUND);
+
+ /*
+ * The test for adjunct partition is performed before the
+ * ANDCOND test. H_RESOURCE may be returned, so we need to
+ * check for that as well.
+ */
+ BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE);
slot_offset++;
slot_offset &= 0x7;
Patches currently in stable-queue which might be from mjw@xxxxxxxxxxxxxxxxxx are
queue-3.4/powerpc-pseries_lpar_hpte_remove-fails-from-adjunct-partition-being-performed-before-the-andcond-test.patch
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