xen/scsiback: correct frontend counting

[cascardo/linux.git] / drivers / xen / xen-scsiback.c

diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 43bcae8..51387d7 100644 (file)
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -726,7 +726,7 @@ static int scsiback_do_cmd_fn(struct vscsibk_info *info)
                if (!pending_req)
                        return 1;
 
-               ring_req = *RING_GET_REQUEST(ring, rc);
+               RING_COPY_REQUEST(ring, rc, &ring_req);
                ring->req_cons = ++rc;
 
                err = prepare_pending_reqs(info, &ring_req, pending_req);
@@ -939,12 +939,12 @@ out:
        spin_unlock_irqrestore(&info->v2p_lock, flags);
 
 out_free:
-       mutex_lock(&tpg->tv_tpg_mutex);
-       tpg->tv_tpg_fe_count--;
-       mutex_unlock(&tpg->tv_tpg_mutex);
-
-       if (err)
+       if (err) {
+               mutex_lock(&tpg->tv_tpg_mutex);
+               tpg->tv_tpg_fe_count--;
+               mutex_unlock(&tpg->tv_tpg_mutex);
                kfree(new);
+       }
 
        return err;
 }