bdrv_set_enable_write_cache() sets the bs->enable_write_cache flag,
but without the flag recorded in bs->open_flags, then next time
a reopen() is performed the enable_write_cache setting may be
inadvertently lost.
This will set the flag in open_flags, so it is preserved across
reopens.
Signed-off-by: Jeff Cody <jc...@redhat.com>
---
block.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/block.c b/block.c
index c3eb585..2b96c8e 100644
--- a/block.c
+++ b/block.c
@@ -2164,6 +2164,13 @@ int bdrv_enable_write_cache(BlockDriverState *bs)
void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce)
{
bs->enable_write_cache = wce;
+
+ /* so a reopen() will preserve wce */
+ if (wce) {
+ bs->open_flags |= BDRV_O_CACHE_WB;
+ } else {
+ bs->open_flags &= ~BDRV_O_CACHE_WB;
+ }
}
int bdrv_is_encrypted(BlockDriverState *bs)
--
1.7.11.4
