1 files changed, 7 insertions, 45 deletions

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index dedaf81d8f36..5a3d0f1eaf94 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -26,10 +26,6 @@
 #include <linux/kthread.h>
 #include <linux/cgroup.h>
 
-#include <linux/net.h>
-#include <linux/if_packet.h>
-#include <linux/if_arp.h>
-
 #include "vhost.h"
 
 enum {
@@ -414,28 +410,16 @@ long vhost_dev_reset_owner(struct vhost_dev *dev)
         return 0;
 }
 
-/* In case of DMA done not in order in lower device driver for some reason.
- * upend_idx is used to track end of used idx, done_idx is used to track head
- * of used idx. Once lower device DMA done contiguously, we will signal KVM
- * guest used idx.
- */
-int vhost_zerocopy_signal_used(struct vhost_virtqueue *vq)
+void vhost_dev_stop(struct vhost_dev *dev)
 {
         int i;
-        int j = 0;
-
-        for (i = vq->done_idx; i != vq->upend_idx; i = (i + 1) % UIO_MAXIOV) {
-                if ((vq->heads[i].len == VHOST_DMA_DONE_LEN)) {
-                        vq->heads[i].len = VHOST_DMA_CLEAR_LEN;
-                        vhost_add_used_and_signal(vq->dev, vq,
-                                                  vq->heads[i].id, 0);
-                        ++j;
-                } else
-                        break;
+
+        for (i = 0; i < dev->nvqs; ++i) {
+                if (dev->vqs[i].kick && dev->vqs[i].handle_kick) {
+                        vhost_poll_stop(&dev->vqs[i].poll);
+                        vhost_poll_flush(&dev->vqs[i].poll);
+                }
         }
-        if (j)
-                vq->done_idx = i;
-        return j;
 }
 
 /* Caller should have device mutex if and only if locked is set */
@@ -444,17 +428,6 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked)
         int i;
 
         for (i = 0; i < dev->nvqs; ++i) {
-                if (dev->vqs[i].kick && dev->vqs[i].handle_kick) {
-                        vhost_poll_stop(&dev->vqs[i].poll);
-                        vhost_poll_flush(&dev->vqs[i].poll);
-                }
-                /* Wait for all lower device DMAs done. */
-                if (dev->vqs[i].ubufs)
-                        vhost_ubuf_put_and_wait(dev->vqs[i].ubufs);
-
-                /* Signal guest as appropriate. */
-                vhost_zerocopy_signal_used(&dev->vqs[i]);
-
                 if (dev->vqs[i].error_ctx)
                         eventfd_ctx_put(dev->vqs[i].error_ctx);
                 if (dev->vqs[i].error)
@@ -1599,14 +1572,3 @@ void vhost_ubuf_put_and_wait(struct vhost_ubuf_ref *ubufs)
         wait_event(ubufs->wait, !atomic_read(&ubufs->kref.refcount));
         kfree(ubufs);
 }
-
-void vhost_zerocopy_callback(struct ubuf_info *ubuf)
-{
-        struct vhost_ubuf_ref *ubufs = ubuf->ctx;
-        struct vhost_virtqueue *vq = ubufs->vq;
-
-        vhost_poll_queue(&vq->poll);
-        /* set len = 1 to mark this desc buffers done DMA */
-        vq->heads[ubuf->desc].len = VHOST_DMA_DONE_LEN;
-        kref_put(&ubufs->kref, vhost_zerocopy_done_signal);
-}