Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio fixes from Michael Tsirkin:
 "Some last minute fixes.

  The virtio-blk one is the most important one since it was actually
  seen in the field, but the rest of them are small and clearly safe,
  everything here has been in next for a while"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vdpa/mlx5: Fix MQ to support non power of two num queues
  vduse: prevent uninitialized memory accesses
  virtio-blk: Fix WARN_ON_ONCE in virtio_queue_rq()
  virtio_test: fixup for vq reset
  virtio-crypto: fix memory-leak
  vdpa/ifcvf: fix the calculation of queuepair

7 files changed, 36 insertions, 17 deletions

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 30255fcaf18121..dd9a05174726bc 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -322,14 +322,14 @@ static blk_status_t virtblk_prep_rq(struct blk_mq_hw_ctx *hctx,
 	if (unlikely(status))
 		return status;
 
-	blk_mq_start_request(req);
-
 	vbr->sg_table.nents = virtblk_map_data(hctx, req, vbr);
 	if (unlikely(vbr->sg_table.nents < 0)) {
 		virtblk_cleanup_cmd(req);
 		return BLK_STS_RESOURCE;
 	}
 
+	blk_mq_start_request(req);
+
 	return BLK_STS_OK;
 }
 
@@ -391,8 +391,7 @@ static bool virtblk_prep_rq_batch(struct request *req)
 }
 
 static bool virtblk_add_req_batch(struct virtio_blk_vq *vq,
-					struct request **rqlist,
-					struct request **requeue_list)
+					struct request **rqlist)
 {
 	unsigned long flags;
 	int err;
@@ -408,7 +407,7 @@ static bool virtblk_add_req_batch(struct virtio_blk_vq *vq,
 		if (err) {
 			virtblk_unmap_data(req, vbr);
 			virtblk_cleanup_cmd(req);
-			rq_list_add(requeue_list, req);
+			blk_mq_requeue_request(req, true);
 		}
 	}
 
@@ -436,7 +435,7 @@ static void virtio_queue_rqs(struct request **rqlist)
 
 		if (!next || req->mq_hctx != next->mq_hctx) {
 			req->rq_next = NULL;
-			kick = virtblk_add_req_batch(vq, rqlist, &requeue_list);
+			kick = virtblk_add_req_batch(vq, rqlist);
 			if (kick)
 				virtqueue_notify(vq->vq);
 
diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
index 2a60d0525cdec0..168195672e2e10 100644
--- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
@@ -56,6 +56,10 @@ static void virtio_crypto_akcipher_finalize_req(
 	struct virtio_crypto_akcipher_request *vc_akcipher_req,
 	struct akcipher_request *req, int err)
 {
+	kfree(vc_akcipher_req->src_buf);
+	kfree(vc_akcipher_req->dst_buf);
+	vc_akcipher_req->src_buf = NULL;
+	vc_akcipher_req->dst_buf = NULL;
 	virtcrypto_clear_request(&vc_akcipher_req->base);
 
 	crypto_finalize_akcipher_request(vc_akcipher_req->base.dataq->engine, req, err);
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index 75a703b803a240..3e4486bfa0b712 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -323,7 +323,7 @@ u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid)
 	u32 q_pair_id;
 
 	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
-	q_pair_id = qid / hw->nr_vring;
+	q_pair_id = qid / 2;
 	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
 	last_avail_idx = vp_ioread16(avail_idx_addr);
 
@@ -337,7 +337,7 @@ int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num)
 	u32 q_pair_id;
 
 	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
-	q_pair_id = qid / hw->nr_vring;
+	q_pair_id = qid / 2;
 	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
 	hw->vring[qid].last_avail_idx = num;
 	vp_iowrite16(num, avail_idx_addr);
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index ed100a35e5969a..90913365def43d 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1320,6 +1320,8 @@ static void teardown_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *
 
 static int create_rqt(struct mlx5_vdpa_net *ndev)
 {
+	int rqt_table_size = roundup_pow_of_two(ndev->rqt_size);
+	int act_sz = roundup_pow_of_two(ndev->cur_num_vqs / 2);
 	__be32 *list;
 	void *rqtc;
 	int inlen;
@@ -1327,7 +1329,7 @@ static int create_rqt(struct mlx5_vdpa_net *ndev)
 	int i, j;
 	int err;
 
-	inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + ndev->rqt_size * MLX5_ST_SZ_BYTES(rq_num);
+	inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + rqt_table_size * MLX5_ST_SZ_BYTES(rq_num);
 	in = kzalloc(inlen, GFP_KERNEL);
 	if (!in)
 		return -ENOMEM;
@@ -1336,12 +1338,12 @@ static int create_rqt(struct mlx5_vdpa_net *ndev)
 	rqtc = MLX5_ADDR_OF(create_rqt_in, in, rqt_context);
 
 	MLX5_SET(rqtc, rqtc, list_q_type, MLX5_RQTC_LIST_Q_TYPE_VIRTIO_NET_Q);
-	MLX5_SET(rqtc, rqtc, rqt_max_size, ndev->rqt_size);
+	MLX5_SET(rqtc, rqtc, rqt_max_size, rqt_table_size);
 	list = MLX5_ADDR_OF(rqtc, rqtc, rq_num[0]);
-	for (i = 0, j = 0; i < ndev->rqt_size; i++, j += 2)
+	for (i = 0, j = 0; i < act_sz; i++, j += 2)
 		list[i] = cpu_to_be32(ndev->vqs[j % ndev->cur_num_vqs].virtq_id);
 
-	MLX5_SET(rqtc, rqtc, rqt_actual_size, ndev->rqt_size);
+	MLX5_SET(rqtc, rqtc, rqt_actual_size, act_sz);
 	err = mlx5_vdpa_create_rqt(&ndev->mvdev, in, inlen, &ndev->res.rqtn);
 	kfree(in);
 	if (err)
@@ -1354,6 +1356,7 @@ static int create_rqt(struct mlx5_vdpa_net *ndev)
 
 static int modify_rqt(struct mlx5_vdpa_net *ndev, int num)
 {
+	int act_sz = roundup_pow_of_two(num / 2);
 	__be32 *list;
 	void *rqtc;
 	int inlen;
@@ -1361,7 +1364,7 @@ static int modify_rqt(struct mlx5_vdpa_net *ndev, int num)
 	int i, j;
 	int err;
 
-	inlen = MLX5_ST_SZ_BYTES(modify_rqt_in) + ndev->rqt_size * MLX5_ST_SZ_BYTES(rq_num);
+	inlen = MLX5_ST_SZ_BYTES(modify_rqt_in) + act_sz * MLX5_ST_SZ_BYTES(rq_num);
 	in = kzalloc(inlen, GFP_KERNEL);
 	if (!in)
 		return -ENOMEM;
@@ -1372,10 +1375,10 @@ static int modify_rqt(struct mlx5_vdpa_net *ndev, int num)
 	MLX5_SET(rqtc, rqtc, list_q_type, MLX5_RQTC_LIST_Q_TYPE_VIRTIO_NET_Q);
 
 	list = MLX5_ADDR_OF(rqtc, rqtc, rq_num[0]);
-	for (i = 0, j = 0; i < ndev->rqt_size; i++, j += 2)
+	for (i = 0, j = 0; i < act_sz; i++, j = j + 2)
 		list[i] = cpu_to_be32(ndev->vqs[j % num].virtq_id);
 
-	MLX5_SET(rqtc, rqtc, rqt_actual_size, ndev->rqt_size);
+	MLX5_SET(rqtc, rqtc, rqt_actual_size, act_sz);
 	err = mlx5_vdpa_modify_rqt(&ndev->mvdev, in, inlen, ndev->res.rqtn);
 	kfree(in);
 	if (err)
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 41c0b29739f164..35dceee3ed5608 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -673,10 +673,15 @@ static void vduse_vdpa_get_config(struct vdpa_device *vdpa, unsigned int offset,
 {
 	struct vduse_dev *dev = vdpa_to_vduse(vdpa);
 
-	if (offset > dev->config_size ||
-	    len > dev->config_size - offset)
+	/* Initialize the buffer in case of partial copy. */
+	memset(buf, 0, len);
+
+	if (offset > dev->config_size)
 		return;
 
+	if (len > dev->config_size - offset)
+		len = dev->config_size - offset;
+
 	memcpy(buf, dev->config + offset, len);
 }
 
diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h
index 363b9822830115..5d3440f474dd37 100644
--- a/tools/virtio/linux/virtio.h
+++ b/tools/virtio/linux/virtio.h
@@ -14,6 +14,7 @@ struct virtio_device {
 	u64 features;
 	struct list_head vqs;
 	spinlock_t vqs_list_lock;
+	const struct virtio_config_ops *config;
 };
 
 struct virtqueue {
@@ -23,7 +24,9 @@ struct virtqueue {
 	struct virtio_device *vdev;
         unsigned int index;
         unsigned int num_free;
+	unsigned int num_max;
 	void *priv;
+	bool reset;
 };
 
 /* Interfaces exported by virtio_ring. */
diff --git a/tools/virtio/linux/virtio_config.h b/tools/virtio/linux/virtio_config.h
index f2640e505c4e79..2a8a70e2a950e6 100644
--- a/tools/virtio/linux/virtio_config.h
+++ b/tools/virtio/linux/virtio_config.h
@@ -3,6 +3,11 @@
 #include <linux/virtio.h>
 #include <uapi/linux/virtio_config.h>
 
+struct virtio_config_ops {
+	int (*disable_vq_and_reset)(struct virtqueue *vq);
+	int (*enable_vq_after_reset)(struct virtqueue *vq);
+};
+
 /*
  * __virtio_test_bit - helper to test feature bits. For use by transports.
  *                     Devices should normally use virtio_has_feature,