Properly check the return value of CCWAddressAsString

It returns NULL on failure. Checking if the negation of it
is less than zero makes no sense. (Found by coverity after moving
the code)

In another case, the return value wasn't checked at all.

(cherry picked from commit 3fe9d75ab641f5b676845980a0ee7aef8148da9b)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index e7037585bd7c38166229e66d88b172cead26d22f..1598ae6e46938706bf3d18c749940cec43dd4724 100644 (file)
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -1129,7 +1129,7 @@ int qemuDomainCCWAddressAssign(virDomainDeviceInfoPtr dev,
             goto cleanup;
         }
     } else if (autoassign && !dev->addr.ccw.assigned) {
-        if (!(addr = qemuCCWAddressAsString(&addrs->next)) < 0)
+        if (!(addr = qemuCCWAddressAsString(&addrs->next)))
             goto cleanup;
 
         while (virHashLookup(addrs->defined, addr)) {
@@ -1139,7 +1139,8 @@ int qemuDomainCCWAddressAssign(virDomainDeviceInfoPtr dev,
                 goto cleanup;
             }
             VIR_FREE(addr);
-            addr = qemuCCWAddressAsString(&addrs->next);
+            if (!(addr = qemuCCWAddressAsString(&addrs->next)))
+                goto cleanup;
         }
         dev->addr.ccw = addrs->next;
         dev->addr.ccw.assigned = true;