[dpdk-stable] [PATCH v17.11 LTS] vhost: fix error handling when mem table gets updated
Maxime Coquelin
maxime.coquelin at redhat.com
Tue Feb 26 11:20:27 CET 2019
[ upstream commit 74ee315e4f1bcbcabae054d310b730be13e49ad4 ]
When the memory table gets updated, the rings addresses need
to be translated again. If it fails, we need to exit cleanly
by unmapping memory regions.
Fixes: 96935c61631f ("vhost: retranslate vring addr when memory table changes")
Cc: stable at dpdk.org
Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
Acked-by: Ilya Maximets <i.maximets at samsung.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
lib/librte_vhost/vhost_user.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 9ab37ae5e..d70778b22 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -761,8 +761,10 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
vring_invalidate(dev, vq);
dev = translate_ring_addresses(dev, i);
- if (!dev)
- return -1;
+ if (!dev) {
+ dev = *pdev;
+ goto err_mmap;
+ }
*pdev = dev;
}
--
2.20.1
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