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[Qemu-devel] [PATCH 1/2] virtio-rng: Move error-checking forward to prev
From: |
John Snow |
Subject: |
[Qemu-devel] [PATCH 1/2] virtio-rng: Move error-checking forward to prevent memory leak |
Date: |
Tue, 29 Jul 2014 19:28:57 -0400 |
This patch pushes the error-checking forward and the virtio
initialization backward in the device realization function
in order to prevent memory leaks for hot plug scenarios.
Signed-off-by: John Snow <address@hidden>
---
hw/virtio/virtio-rng.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index 7c5a675..ff58917 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -147,6 +147,14 @@ static void virtio_rng_device_realize(DeviceState *dev,
Error **errp)
return;
}
+ /* Workaround: Property parsing does not enforce unsigned integers,
+ * So this is a hack to reject such numbers. */
+ if (vrng->conf.max_bytes > INT64_MAX) {
+ error_set(errp, QERR_INVALID_PARAMETER_VALUE, "max-bytes",
+ "a non-negative integer below 2^63");
+ return;
+ }
+
if (vrng->conf.rng == NULL) {
vrng->conf.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
@@ -171,23 +179,15 @@ static void virtio_rng_device_realize(DeviceState *dev,
Error **errp)
"rng", NULL);
}
- virtio_init(vdev, "virtio-rng", VIRTIO_ID_RNG, 0);
-
vrng->rng = vrng->conf.rng;
if (vrng->rng == NULL) {
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "rng", "a valid object");
return;
}
- vrng->vq = virtio_add_queue(vdev, 8, handle_input);
+ virtio_init(vdev, "virtio-rng", VIRTIO_ID_RNG, 0);
- /* Workaround: Property parsing does not enforce unsigned integers,
- * So this is a hack to reject such numbers. */
- if (vrng->conf.max_bytes > INT64_MAX) {
- error_set(errp, QERR_INVALID_PARAMETER_VALUE, "max-bytes",
- "a non-negative integer below 2^63");
- return;
- }
+ vrng->vq = virtio_add_queue(vdev, 8, handle_input);
vrng->quota_remaining = vrng->conf.max_bytes;
vrng->rate_limit_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
--
1.9.3