From ea16c51433510f7f758382dec5b933fc0797f244 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Thu, 5 Jun 2014 15:20:23 +0300 Subject: vhost: move acked_features to VQs Refactor code to make sure features are only accessed under VQ mutex. This makes everything simpler, no need for RCU here anymore. Signed-off-by: Michael S. Tsirkin --- drivers/vhost/test.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/vhost/test.c') diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c index c2a54fbf7f99..6fa3bf8bdec7 100644 --- a/drivers/vhost/test.c +++ b/drivers/vhost/test.c @@ -241,15 +241,18 @@ done: static int vhost_test_set_features(struct vhost_test *n, u64 features) { + struct vhost_virtqueue *vq; + mutex_lock(&n->dev.mutex); if ((features & (1 << VHOST_F_LOG_ALL)) && !vhost_log_access_ok(&n->dev)) { mutex_unlock(&n->dev.mutex); return -EFAULT; } - n->dev.acked_features = features; - smp_wmb(); - vhost_test_flush(n); + vq = &n->vqs[VHOST_TEST_VQ]; + mutex_lock(&vq->mutex); + vq->acked_features = features; + mutex_unlock(&vq->mutex); mutex_unlock(&n->dev.mutex); return 0; } -- cgit v1.2.3-70-g09d2