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virtio: rng: Check notifier helpers for VIRTIO_CONFIG_IRQ_IDX

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Since the driver doesn't support interrupts, we must return early when
index is set to VIRTIO_CONFIG_IRQ_IDX.  Basically the same thing Viresh
did for "91208dd297f2 virtio: i2c: Check notifier helpers for
VIRTIO_CONFIG_IRQ_IDX".

Fixes: 544f0278afca ("virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX")
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Message-Id: <20231025171841.3379663-1-mathieu.poirier@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Mathieu Poirier 2023-10-25 11:18:41 -06:00 committed by Michael S. Tsirkin
parent 80f1709aa0
commit df72f01104
1 changed files with 16 additions and 0 deletions
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16
hw/virtio/vhost-user-rng.c
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@ -129,6 +129,14 @@ static void vu_rng_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
{
VHostUserRNG *rng = VHOST_USER_RNG(vdev);
/*
* We don't support interrupts, return early if index is set to
* VIRTIO_CONFIG_IRQ_IDX.
*/
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return;
}
vhost_virtqueue_mask(&rng->vhost_dev, vdev, idx, mask);
}
@ -136,6 +144,14 @@ static bool vu_rng_guest_notifier_pending(VirtIODevice *vdev, int idx)
{
VHostUserRNG *rng = VHOST_USER_RNG(vdev);
/*
* We don't support interrupts, return early if index is set to
* VIRTIO_CONFIG_IRQ_IDX.
*/
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return false;
}
return vhost_virtqueue_pending(&rng->vhost_dev, idx);
}