[Qemu-devel] [PATCH] vvfat: Fix inherit_options flags

[Fam Zheng <famz@redhat.com>]

Overriding flags violates the precedence rules of
bdrv_reopen_queue_child. Just like the read-only option, no-flush should
be put into the options. The same is done in bdrv_temp_snapshot_options.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block/vvfat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/vvfat.c b/block/vvfat.c
index 4a17a49e12..1569783b0f 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -3129,7 +3129,7 @@ static void vvfat_qcow_options(int *child_flags, QDict *child_options,
                                int parent_flags, QDict *parent_options)
 {
     qdict_set_default_str(child_options, BDRV_OPT_READ_ONLY, "off");
-    *child_flags = BDRV_O_NO_FLUSH;
+    qdict_set_default_str(child_options, BDRV_OPT_CACHE_NO_FLUSH, "on");
 }
 
 static const BdrvChildRole child_vvfat_qcow = {
-- 
2.14.3