diff options
Diffstat (limited to 'net/9p/trans_virtio.c')
| -rw-r--r-- | net/9p/trans_virtio.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index 4cdab7094b27..b0d0094ec8e2 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -532,6 +532,11 @@ req_retry_pinned: p9_debug(P9_DEBUG_TRANS, "virtio request kicked\n"); err = io_wait_event_killable(req->wq, READ_ONCE(req->status) >= REQ_STATUS_RCVD); + /* + * Make sure our req is coherent with regard to updates in other + * threads - echoes to wmb() in the callback + */ + smp_rmb(); // RERROR needs reply (== error string) in static data if (READ_ONCE(req->status) == REQ_STATUS_RCVD && unlikely(req->rc.sdata[4] == P9_RERROR)) |