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diff --git a/sys/dev/virtio/p9fs/virtio_p9fs.c b/sys/dev/virtio/p9fs/virtio_p9fs.c
index 24d4542e4e48..1d9b847717b7 100644
--- a/sys/dev/virtio/p9fs/virtio_p9fs.c
+++ b/sys/dev/virtio/p9fs/virtio_p9fs.c
@@ -110,20 +110,20 @@ SYSCTL_UINT(_vfs_9p, OID_AUTO, ackmaxidle, CTLFLAG_RW, &vt9p_ackmaxidle, 0,
static int
vt9p_req_wait(struct vt9p_softc *chan, struct p9_req_t *req)
{
- if (req->tc->tag != req->rc->tag) {
- if (msleep(req, VT9P_MTX(chan), 0, "chan lock",
- vt9p_ackmaxidle * hz)) {
- /*
- * Waited for 120s. No response from host.
- * Can't wait for ever..
- */
- P9_DEBUG(ERROR, "Timeout after waiting %u seconds"
- "for an ack from host\n", vt9p_ackmaxidle);
- return (EIO);
- }
- KASSERT(req->tc->tag == req->rc->tag,
- ("Spurious event on p9 req"));
+ KASSERT(req->tc->tag != req->rc->tag,
+ ("%s: request %p already completed", __func__, req));
+
+ if (msleep(req, VT9P_MTX(chan), 0, "chan lock", vt9p_ackmaxidle * hz)) {
+ /*
+ * Waited for 120s. No response from host.
+ * Can't wait for ever..
+ */
+ P9_DEBUG(ERROR, "Timeout after waiting %u seconds"
+ "for an ack from host\n", vt9p_ackmaxidle);
+ return (EIO);
}
+ KASSERT(req->tc->tag == req->rc->tag,
+ ("%s spurious event on request %p", __func__, req));
return (0);
}
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