[PATCH] virtio_ring: fix uninitialized symbol warnings

[Chelsy Ratnawat]

Fix below smatch warnings:
  virtio_ring.c:1566 virtqueue_add_packed() error: uninitialized symbol 'prev'.
  virtio_ring.c:1574 virtqueue_add_packed() error: uninitialized symbol 
'head_flags'.
  virtio_ring.c:635 virtqueue_add_split() error: uninitialized symbol 'prev'.

No functional changes intended.

Signed-off-by: Chelsy Ratnawat <chelsyratnawat2...@gmail.com>
---
 drivers/virtio/virtio_ring.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index f5062061c408..03aa08aaebed 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -540,7 +540,7 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
        struct vring_desc_extra *extra;
        struct scatterlist *sg;
        struct vring_desc *desc;
-       unsigned int i, n, avail, descs_used, prev, err_idx;
+       unsigned int i, n, avail, descs_used, prev = 0, err_idx;
        int head;
        bool indirect;
 
@@ -1459,8 +1459,8 @@ static inline int virtqueue_add_packed(struct virtqueue 
*_vq,
        struct vring_packed_desc *desc;
        struct scatterlist *sg;
        unsigned int i, n, c, descs_used, err_idx, len;
-       __le16 head_flags, flags;
-       u16 head, id, prev, curr, avail_used_flags;
+       __le16 head_flags = 0, flags;
+       u16 head, id, prev = 0, curr, avail_used_flags;
        int err;
 
        START_USE(vq);
-- 
2.47.3