[PATCH] powerpc/lpar: Don't crash on H_PROTECT errors

[Anshuman Khandual]

There are certain condition in which H_PROTECT can return error code
other than H_NOT_FOUND and H_SUCCESS. One such being an attempt to
update an hpte owned by adjunct partition. Return 0 in that case so
that user space will retry the access. In adjunct case this mean we
will not make much progress in the user space. But atleast we get a
chance to kill the task and avoid taking down the entire box.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
Signed-off-by: Anshuman Khandual <khandual at linux.vnet.ibm.com>
---
 arch/powerpc/platforms/pseries/lpar.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index 477290a..31bcdaf 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -310,7 +310,7 @@ static long pSeries_lpar_hpte_updatepp(unsigned long slot,
 
 	pr_devel("ok\n");
 
-	BUG_ON(lpar_rc != H_SUCCESS);
+	WARN_RATELIMIT(lpar_rc != H_SUCCESS, "H_PROTECT returned %lu\n", lpar_rc);
 
 	return 0;
 }
-- 
2.1.0