[PATCH] KVM: s390: Move two error code assignments in kvm_vm_ioctl_get_dirty_log()

SF Markus Elfring
2017-01-21T16:03:35Z

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 21 Jan 2017 16:52:23 +0100

A local variable was set to an error code in two cases before a concrete
error situation was detected. Thus move the corresponding assignments into
if branches to indicate a software failure there.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
arch/s390/kvm/kvm-s390.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 4f74511015b8..bc875d08b838 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -443,16 +443,17 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
int is_dirty = 0;

mutex_lock(&kvm->slots_lock);
-
- r = -EINVAL;
- if (log->slot >= KVM_USER_MEM_SLOTS)
+ if (log->slot >= KVM_USER_MEM_SLOTS) {
+ r = -EINVAL;
goto out;
+ }

slots = kvm_memslots(kvm);
memslot = id_to_memslot(slots, log->slot);
- r = -ENOENT;
- if (!memslot->dirty_bitmap)
+ if (!memslot->dirty_bitmap) {
+ r = -ENOENT;
goto out;
+ }

kvm_s390_sync_dirty_log(kvm, memslot);
r = kvm_get_dirty_log(kvm, log, &is_dirty);
--
2.11.0