2 files changed, 11 insertions, 3 deletions
diff --git a/block.c b/block.c
index 31d1ba4bfd..e891544dd1 100644
--- a/block.c
+++ b/block.c
@@ -1134,8 +1134,11 @@ int bdrv_set_key(BlockDriverState *bs, const char *key)
         if (!bs->encrypted)
             return 0;
     }
-    if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
-        return -1;
+    if (!bs->encrypted) {
+        return -EINVAL;
+    } else if (!bs->drv || !bs->drv->bdrv_set_key) {
+        return -ENOMEDIUM;
+    }
     ret = bs->drv->bdrv_set_key(bs, key);
     if (ret < 0) {
         bs->valid_key = 0;
diff --git a/monitor.c b/monitor.c
index f0ec84d52f..0448a70c10 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1057,6 +1057,7 @@ static int do_block_set_passwd(Monitor *mon, const QDict *qdict,
                                 QObject **ret_data)
 {
     BlockDriverState *bs;
+    int err;
 
     bs = bdrv_find(qdict_get_str(qdict, "device"));
     if (!bs) {
@@ -1064,7 +1065,11 @@ static int do_block_set_passwd(Monitor *mon, const QDict *qdict,
         return -1;
     }
 
-    if (bdrv_set_key(bs, qdict_get_str(qdict, "password")) < 0) {
+    err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
+    if (err == -EINVAL) {
+        qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
+        return -1;
+    } else if (err < 0) {
         qerror_report(QERR_INVALID_PASSWORD);
         return -1;
     }