[PATCH v4 21/25] vfio: Reverse test on vfio_get_dirty_bitmap()

["Cédric Le Goater" <clg@redhat.com>]

It will simplify the changes coming after.

Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/vfio/common.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 5b2e6a179cdd5f8ca5be84b7097661e96b391456..6820d2efe4923d5043da7eb8deecb6ff20e1fd16 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1241,16 +1241,20 @@ static void vfio_iommu_map_dirty_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb)
     }
 
     rcu_read_lock();
-    if (vfio_get_xlat_addr(iotlb, NULL, &translated_addr, NULL)) {
-        ret = vfio_get_dirty_bitmap(bcontainer, iova, iotlb->addr_mask + 1,
-                                    translated_addr);
-        if (ret) {
-            error_report("vfio_iommu_map_dirty_notify(%p, 0x%"HWADDR_PRIx", "
-                         "0x%"HWADDR_PRIx") = %d (%s)",
-                         bcontainer, iova, iotlb->addr_mask + 1, ret,
-                         strerror(-ret));
-        }
+    if (!vfio_get_xlat_addr(iotlb, NULL, &translated_addr, NULL)) {
+        goto out_lock;
     }
+
+    ret = vfio_get_dirty_bitmap(bcontainer, iova, iotlb->addr_mask + 1,
+                                translated_addr);
+    if (ret) {
+        error_report("vfio_iommu_map_dirty_notify(%p, 0x%"HWADDR_PRIx", "
+                     "0x%"HWADDR_PRIx") = %d (%s)",
+                     bcontainer, iova, iotlb->addr_mask + 1, ret,
+                     strerror(-ret));
+    }
+
+out_lock:
     rcu_read_unlock();
 
 out:
-- 
2.44.0