[PATCH v4] doc: fix vhost multi-queue reconnection

[xuan.ding at intel.com]

From: Xuan Ding <xuan.ding at intel.com>

Since QEMU 5.2.0 fixes the vhost split ring multi-queue reconnection
issue in commit f66337bdbfda ("vhost-user: save features of multiqueues
if chardev is closed"), this patch updates known issue to indicate
the range of affeacted QEMU versions.

Fixes: b37e95507e1b ("doc: add vhost multi-queue reconnection issue")
Cc: stable at dpdk.org

Signed-off-by: Xuan Ding <xuan.ding at intel.com>
---
v4:
* Corrected the QEMU fix version.

v3:
* Updated affected QEMU versions.

v2:
* Added fixes in commit title and log.
---
 doc/guides/rel_notes/known_issues.rst | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
index 187d9c942e..570550843a 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -885,14 +885,15 @@ Unsuitable IOVA mode may be picked as the default
 **Driver/Module**:
    ALL.
 
-Vhost multi-queue reconnection failed with QEMU version >= 4.2.0
-----------------------------------------------------------------
+Vhost multi-queue reconnection failed with QEMU version 4.2.0 to 5.1.0
+----------------------------------------------------------------------
 
 **Description**
    It's a QEMU regression bug (bad commit: c6beefd674ff). QEMU only saves
    acked features for one vhost-net when vhost quits. When vhost reconnects
    to virtio-net/virtio-pmd in multi-queue situations, the features been
-   set multiple times are not consistent.
+   set multiple times are not consistent. QEMU-5.2.0 fixes this issue in commit
+   f66337bdbfda ("vhost-user: save features of multiqueues if chardev is closed").
 
 **Implication**
    Vhost cannot reconnect back to virtio-net/virtio-pmd normally.
-- 
2.17.1