block/qed: use buffer-based io

Move to _co_ versions of io functions qed_read_table() and
qed_write_table(), as we use qemu_co_mutex_unlock()
anyway.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/block/qed.c b/block/qed.c
index 89af05d524..912edaf56a 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -113,15 +113,13 @@ static int coroutine_fn qed_write_header(BDRVQEDState *s)
     int nsectors = DIV_ROUND_UP(sizeof(QEDHeader), BDRV_SECTOR_SIZE);
     size_t len = nsectors * BDRV_SECTOR_SIZE;
     uint8_t *buf;
-    QEMUIOVector qiov;
     int ret;
 
     assert(s->allocating_acb || s->allocating_write_reqs_plugged);
 
     buf = qemu_blockalign(s->bs, len);
-    qemu_iovec_init_buf(&qiov, buf, len);
 
-    ret = bdrv_co_preadv(s->bs->file, 0, qiov.size, &qiov, 0);
+    ret = bdrv_co_pread(s->bs->file, 0, len, buf, 0);
     if (ret < 0) {
         goto out;
     }
@@ -129,7 +127,7 @@ static int coroutine_fn qed_write_header(BDRVQEDState *s)
     /* Update header */
     qed_header_cpu_to_le(&s->header, (QEDHeader *) buf);
 
-    ret = bdrv_co_pwritev(s->bs->file, 0, qiov.size,  &qiov, 0);
+    ret = bdrv_co_pwrite(s->bs->file, 0, len,  buf, 0);
     if (ret < 0) {
         goto out;
     }