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| author | Ladi Prosek <lprosek@redhat.com> | 2016-03-03 10:48:34 +0100 |
|---|---|---|
| committer | Amit Shah <amit.shah@redhat.com> | 2016-03-03 17:42:26 +0530 |
| commit | f8693c2cd06d0401007b2c168126ab907f6da345 (patch) | |
| tree | a3b813016b49116b18a7e18c4f5021dd556c109c | |
| parent | 60253ed1e6ec6d8e5ef2efe7bf755f475dce9956 (diff) | |
| download | qemu-f8693c2cd06d0401007b2c168126ab907f6da345.zip qemu-f8693c2cd06d0401007b2c168126ab907f6da345.tar.gz qemu-f8693c2cd06d0401007b2c168126ab907f6da345.tar.bz2 | |
virtio-rng: ask for more data if queue is not fully drained
This commit effectively reverts:
commit 4621c1768ef5d12171cca2aa1473595ecb9f1c9e
Author: Amit Shah <amit.shah@redhat.com>
Date: Wed Nov 21 11:21:19 2012 +0530
virtio-rng: remove extra request for entropy
but instead of calling virtio_rng_process unconditionally, it
first checks to see if the queue is empty as a little bit of
optimization.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Message-Id: <1456998514-19271-1-git-send-email-lprosek@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
| -rw-r--r-- | hw/virtio/virtio-rng.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c index 17da2f8..d713464 100644 --- a/hw/virtio/virtio-rng.c +++ b/hw/virtio/virtio-rng.c @@ -69,6 +69,13 @@ static void chr_read(void *opaque, const void *buf, size_t size) g_free(elem); } virtio_notify(vdev, vrng->vq); + + if (!virtio_queue_empty(vrng->vq)) { + /* If we didn't drain the queue, call virtio_rng_process + * to take care of asking for more data as appropriate. + */ + virtio_rng_process(vrng); + } } static void virtio_rng_process(VirtIORNG *vrng) |