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path: root/drivers/vhost/net.c
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Diffstat (limited to 'drivers/vhost/net.c')
-rw-r--r--drivers/vhost/net.c37
1 files changed, 16 insertions, 21 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 027be91db13..969a85960e9 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -15,7 +15,6 @@
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
-#include <linux/rcupdate.h>
#include <linux/file.h>
#include <linux/slab.h>
@@ -346,12 +345,11 @@ static void handle_tx(struct vhost_net *net)
struct vhost_net_ubuf_ref *uninitialized_var(ubufs);
bool zcopy, zcopy_used;
- /* TODO: check that we are running from vhost_worker? */
- sock = rcu_dereference_check(vq->private_data, 1);
+ mutex_lock(&vq->mutex);
+ sock = vq->private_data;
if (!sock)
- return;
+ goto out;
- mutex_lock(&vq->mutex);
vhost_disable_notify(&net->dev, vq);
hdr_size = nvq->vhost_hlen;
@@ -461,7 +459,7 @@ static void handle_tx(struct vhost_net *net)
break;
}
}
-
+out:
mutex_unlock(&vq->mutex);
}
@@ -570,14 +568,14 @@ static void handle_rx(struct vhost_net *net)
s16 headcount;
size_t vhost_hlen, sock_hlen;
size_t vhost_len, sock_len;
- /* TODO: check that we are running from vhost_worker? */
- struct socket *sock = rcu_dereference_check(vq->private_data, 1);
-
- if (!sock)
- return;
+ struct socket *sock;
mutex_lock(&vq->mutex);
+ sock = vq->private_data;
+ if (!sock)
+ goto out;
vhost_disable_notify(&net->dev, vq);
+
vhost_hlen = nvq->vhost_hlen;
sock_hlen = nvq->sock_hlen;
@@ -652,7 +650,7 @@ static void handle_rx(struct vhost_net *net)
break;
}
}
-
+out:
mutex_unlock(&vq->mutex);
}
@@ -750,8 +748,7 @@ static int vhost_net_enable_vq(struct vhost_net *n,
struct vhost_poll *poll = n->poll + (nvq - n->vqs);
struct socket *sock;
- sock = rcu_dereference_protected(vq->private_data,
- lockdep_is_held(&vq->mutex));
+ sock = vq->private_data;
if (!sock)
return 0;
@@ -764,10 +761,9 @@ static struct socket *vhost_net_stop_vq(struct vhost_net *n,
struct socket *sock;
mutex_lock(&vq->mutex);
- sock = rcu_dereference_protected(vq->private_data,
- lockdep_is_held(&vq->mutex));
+ sock = vq->private_data;
vhost_net_disable_vq(n, vq);
- rcu_assign_pointer(vq->private_data, NULL);
+ vq->private_data = NULL;
mutex_unlock(&vq->mutex);
return sock;
}
@@ -923,8 +919,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
}
/* start polling new socket */
- oldsock = rcu_dereference_protected(vq->private_data,
- lockdep_is_held(&vq->mutex));
+ oldsock = vq->private_data;
if (sock != oldsock) {
ubufs = vhost_net_ubuf_alloc(vq,
sock && vhost_sock_zcopy(sock));
@@ -934,7 +929,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
}
vhost_net_disable_vq(n, vq);
- rcu_assign_pointer(vq->private_data, sock);
+ vq->private_data = sock;
r = vhost_init_used(vq);
if (r)
goto err_used;
@@ -968,7 +963,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
return 0;
err_used:
- rcu_assign_pointer(vq->private_data, oldsock);
+ vq->private_data = oldsock;
vhost_net_enable_vq(n, vq);
if (ubufs)
vhost_net_ubuf_put_wait_and_free(ubufs);