blob: ca46b5a9fca4a87851a4b20ab07b4df74dbe2bd9 [file] [log] [blame]
From: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Date: Tue, 9 Aug 2016 10:39:13 +0530
Subject: powerpc/book3s: Fix MCE console messages for unrecoverable MCE.
commit c74dd88e77d3ecbc9e55c78796d82c9aa21cabad upstream.
When machine check occurs with MSR(RI=0), it means MC interrupt is
unrecoverable and kernel goes down to panic path. But the console
message still shows it as recovered. This patch fixes the MCE console
messages.
Fixes: 36df96f8acaf ("powerpc/book3s: Decode and save machine check event.")
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
arch/powerpc/kernel/mce.c | 3 ++-
arch/powerpc/platforms/powernv/opal.c | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c
@@ -92,7 +92,8 @@ void save_mce_event(struct pt_regs *regs
mce->in_use = 1;
mce->initiator = MCE_INITIATOR_CPU;
- if (handled)
+ /* Mark it recovered if we have handled it and MSR(RI=1). */
+ if (handled && (regs->msr & MSR_RI))
mce->disposition = MCE_DISPOSITION_RECOVERED;
else
mce->disposition = MCE_DISPOSITION_NOT_RECOVERED;
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -459,6 +459,7 @@ static int opal_recover_mce(struct pt_re
if (!(regs->msr & MSR_RI)) {
/* If MSR_RI isn't set, we cannot recover */
+ pr_err("Machine check interrupt unrecoverable: MSR(RI=0)\n");
recovered = 0;
} else if (evt->disposition == MCE_DISPOSITION_RECOVERED) {
/* Platform corrected itself */