From: Tiwei Bie <tiwei.bie@intel.com>
Date: Fri, 4 Jan 2019 04:06:37 +0000 (+0800)
Subject: vhost: fix desc access in relay helpers
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=e218fa09f4a8e9ce21798ecf0582062e4a94d2b3;p=dpdk.git

vhost: fix desc access in relay helpers

Descs in desc table should be indexed using the desc idx
instead of the idx of avail ring and used ring.

Fixes: b13ad2decc83 ("vhost: provide helpers for virtio ring relay")

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---

diff --git a/lib/librte_vhost/vdpa.c b/lib/librte_vhost/vdpa.c
index 240a1fe3a1..77d92f9ad7 100644
--- a/lib/librte_vhost/vdpa.c
+++ b/lib/librte_vhost/vdpa.c
@@ -190,10 +190,10 @@ rte_vdpa_relay_vring_avail(int vid, uint16_t qid, void *vring_m)
 			if (unlikely(!desc_ring))
 				return -1;
 
-			if (unlikely(dlen < vq->desc[idx].len)) {
+			if (unlikely(dlen < vq->desc[desc_id].len)) {
 				idesc = alloc_copy_ind_table(dev, vq,
-						vq->desc[idx].addr,
-						vq->desc[idx].len);
+						vq->desc[desc_id].addr,
+						vq->desc[desc_id].len);
 				if (unlikely(!idesc))
 					return -1;
 
@@ -279,10 +279,10 @@ rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m)
 			if (unlikely(!desc_ring))
 				return -1;
 
-			if (unlikely(dlen < vq->desc[idx].len)) {
+			if (unlikely(dlen < vq->desc[desc_id].len)) {
 				idesc = alloc_copy_ind_table(dev, vq,
-						vq->desc[idx].addr,
-						vq->desc[idx].len);
+						vq->desc[desc_id].addr,
+						vq->desc[desc_id].len);
 				if (unlikely(!idesc))
 					return -1;