diff options
| author | Eugenio Pérez <eperezma@redhat.com> | 2022-05-19 16:59:19 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-09 10:21:29 +0200 |
| commit | 19e5aac38abca5213bab8b9a1dab25b9adf1ff68 (patch) | |
| tree | 613aaca0d7517419db3f09f6d1e2d2ce2eeb2d96 | |
| parent | ec029087dfef70a89c5ff0c6433bd4da211cbbad (diff) | |
vdpasim: allow to enable a vq repeatedly
commit 242436973831aa97e8ce19533c6c912ea8def31b upstream.
Code must be resilient to enable a queue many times.
At the moment the queue is resetting so it's definitely not the expected
behavior.
v2: set vq->ready = 0 at disable.
Fixes: 2c53d0f64c06 ("vdpasim: vDPA device simulator")
Cc: stable@vger.kernel.org
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20220519145919.772896-1-eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/vdpa/vdpa_sim/vdpa_sim.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index f2ad450db547..e65c0fa95d31 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -473,11 +473,14 @@ static void vdpasim_set_vq_ready(struct vdpa_device *vdpa, u16 idx, bool ready) { struct vdpasim *vdpasim = vdpa_to_sim(vdpa); struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx]; + bool old_ready; spin_lock(&vdpasim->lock); + old_ready = vq->ready; vq->ready = ready; - if (vq->ready) + if (vq->ready && !old_ready) { vdpasim_queue_ready(vdpasim, idx); + } spin_unlock(&vdpasim->lock); } |