[PATCH 1/3] KVM: s390: remove user triggerable WARN_ON
Christian Borntraeger <[email protected]>
| Newsgroups | org.kernel.vger.linux-s390,org.kernel.vger.kvm |
|---|---|
| Message-ID | <[email protected]> |
pin_map_page() fails legitimately whenever the userspace mapping behind
the adapter route has gone away, e.g. when the VMM unmaps that memory.
As this can happen without a kernel programming error, remove the
WARN_ON.
Fixes: 8c0141b7c13c ("KVM: s390: Enable adapter_indicators_set to use mapped pages")
Cc: Douglas Freimuth <[email protected]>
Cc: Matthew Rosato <[email protected]>
Signed-off-by: Christian Borntraeger <[email protected]>
---
arch/s390/kvm/interrupt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 8f24bcd1a6d3..23f0e0821474 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -3013,7 +3013,7 @@ static int adapter_indicators_set(struct kvm *kvm,
if (!summary_info) {
spin_unlock_irqrestore(&adapter->maps_lock, flags);
summary_page = pin_map_page(kvm, adapter_int->summary_addr, 0);
- if (WARN_ON_ONCE(!summary_page))
+ if (!summary_page)
return -1;
idx = srcu_read_lock(&kvm->srcu);
map = page_address(summary_page);
--
2.53.0