Changeset 417aaafb in mainline for uspace/drv/nic/virtio-net/virtio-net.c

Timestamp:

2018-06-25T21:37:48Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e3107e2

Parents:

ea6840d

Message:

Protect the virtqueue with a mutex

File:

• uspace/drv/nic/virtio-net/virtio-net.c (modified) (2 diffs)

uspace/drv/nic/virtio-net/virtio-net.c

@@ -155 +155 @@
     uint16_t *head)
 {
+        virtq_t *q = &vdev->queues[num];
+        fibril_mutex_lock(&q->lock);
         uint16_t descno = *head;
         if (descno != (uint16_t) -1U)
                 *head = virtio_virtq_desc_get_next(vdev, num, descno);
+        fibril_mutex_unlock(&q->lock);
         return descno;
 }
@@ -171 +174 @@
     uint16_t *head, uint16_t descno)
 {
+        virtq_t *q = &vdev->queues[num];
+        fibril_mutex_lock(&q->lock);
         virtio_virtq_desc_set(vdev, num, descno, 0, 0, VIRTQ_DESC_F_NEXT,
             *head);
         *head = descno;
+        fibril_mutex_unlock(&q->lock);
 }