[Qemu-devel] [PULL 19/27] migration: Use cmpxchg correctly

[Juan Quintela]

cmpxchg returns the old value

Signed-off-by: Juan Quintela <address@hidden>
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
---
 migration/migration.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/migration/migration.c b/migration/migration.c
index edb4f3e..1e34aa5 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -509,7 +509,7 @@ void qmp_migrate_set_parameters(bool has_compress_level,

 static void migrate_set_state(MigrationState *s, int old_state, int new_state)
 {
-    if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) {
+    if (atomic_cmpxchg(&s->state, old_state, new_state) == old_state) {
         trace_migrate_set_state(new_state);
     }
 }
-- 
2.4.3