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-rw-r--r--block/io.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/block/io.c b/block/io.c
index d5493ba349..9c04086286 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2283,11 +2283,11 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs)
int current_gen = bs->write_gen;
/* Wait until any previous flushes are completed */
- while (bs->flush_started_gen != bs->flushed_gen) {
+ while (bs->active_flush_req != NULL) {
qemu_co_queue_wait(&bs->flush_queue);
}
- bs->flush_started_gen = current_gen;
+ bs->active_flush_req = &req;
/* Write back all layers by calling one driver function */
if (bs->drv->bdrv_co_flush) {
@@ -2357,6 +2357,7 @@ flush_parent:
out:
/* Notify any pending flushes that we have completed */
bs->flushed_gen = current_gen;
+ bs->active_flush_req = NULL;
qemu_co_queue_restart_all(&bs->flush_queue);
tracked_request_end(&req);