On Tue, Jul 20, 2021 at 08:25:33AM +0300, Eli Cohen wrote:
When calling vringh_init_iotlb(), use the negotiated features which
might be different than the supported features.

Fixes: 2c53d0f64c06f ("vdpasim: vDPA device simulator")
Signed-off-by: Eli Cohen <e...@nvidia.com>
---
v0 --> v1:
Update "Fixes" line

drivers/vdpa/vdpa_sim/vdpa_sim.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 14e024de5cbf..89a474c7a096 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -66,7 +66,7 @@ static void vdpasim_queue_ready(struct vdpasim *vdpasim, 
unsigned int idx)
{
        struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];

-       vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,
+       vringh_init_iotlb(&vq->vring, vdpasim->features,
                          VDPASIM_QUEUE_MAX, false,
                          (struct vring_desc *)(uintptr_t)vq->desc_addr,
                          (struct vring_avail *)
@@ -86,7 +86,7 @@ static void vdpasim_vq_reset(struct vdpasim *vdpasim,
        vq->device_addr = 0;
        vq->cb = NULL;
        vq->private = NULL;
-       vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,
+       vringh_init_iotlb(&vq->vring, vdpasim->features,

vdpasim_vq_reset() is called while resetting the device in vdpasim_reset() where we also set `vdpasim->features = 0` after resetting the vqs, so maybe it's better to use the supported features here, since the negotiated ones are related to the previous instance.

Thanks,
Stefano

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