From 12f622b769bb34f8dba78c4712220828a3cce029 Mon Sep 17 00:00:00 2001
From: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Date: Fri, 19 Apr 2019 03:40:39 +0200
Subject: [PATCH] virtio: zero-out virtqueue structures at init

They used to be allocated with spdk_dma_zmalloc() which did
provide zeroed memory, but we unintentionally changed that
when switching to posix_memalign.

The structure might have some unitialized memory, so with
this patch we just memset it right after allocating it.

Change-Id: Id5a5685e09419901513925abaeed605c36f5199a
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/451546
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
---
 lib/virtio/virtio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/virtio/virtio.c b/lib/virtio/virtio.c
index 1d01e719f..997de52f0 100644
--- a/lib/virtio/virtio.c
+++ b/lib/virtio/virtio.c
@@ -145,6 +145,7 @@ virtio_init_queue(struct virtio_dev *dev, uint16_t vtpci_queue_idx)
 		SPDK_ERRLOG("can not allocate vq\n");
 		return -ENOMEM;
 	}
+	memset(vq, 0, size);
 	dev->vqs[vtpci_queue_idx] = vq;
 
 	vq->vdev = dev;