diff options
| author | Fam Zheng <famz@redhat.com> | 2015-11-23 08:41:20 +0800 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-11-24 09:27:49 +0800 |
| commit | 466138dc689b6b14f31d5d20316affb4b4efd177 (patch) | |
| tree | 3e174681776a6d36a270ddfc6fa004b055971c9c | |
| parent | c9f6856ded10602147ca1d1806e7afb545430fd9 (diff) | |
virtio-blk: Move resetting of req->mr_next to virtio_blk_handle_rw_error
"werror=report" would free the req in virtio_blk_handle_rw_error, we
mustn't write to it in that case.
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1448239280-15025-1-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | hw/block/virtio-blk.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 848f3fe3e1..756ae5ce63 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -72,6 +72,9 @@ static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error, VirtIOBlock *s = req->dev; if (action == BLOCK_ERROR_ACTION_STOP) { + /* Break the link as the next request is going to be parsed from the + * ring again. Otherwise we may end up doing a double completion! */ + req->mr_next = NULL; req->next = s->rq; s->rq = req; } else if (action == BLOCK_ERROR_ACTION_REPORT) { @@ -112,10 +115,6 @@ static void virtio_blk_rw_complete(void *opaque, int ret) * happen on the other side of the migration). */ if (virtio_blk_handle_rw_error(req, -ret, is_read)) { - /* Break the link in case the next request is added to the - * restart queue and is going to be parsed from the ring again. - */ - req->mr_next = NULL; continue; } } |