When we try to hot-remove a busy virtio-rng device from QEMU monitor,
the device can't be hot-removed. Because virtio-rng driver hangs at
wait_for_completion_killable().
This patch fixed the hang by completing have_data completion before
unregistering a virtio-rng device.
Signed-off-by: Amos Kong <ak...@redhat.com>
Cc: sta...@vger.kernel.org
---
drivers/char/hw_random/virtio-rng.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/char/hw_random/virtio-rng.c
b/drivers/char/hw_random/virtio-rng.c
index 0027137..416b15c 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -137,6 +137,7 @@ static void remove_common(struct virtio_device *vdev)
struct virtrng_info *vi = vdev->priv;
vdev->config->reset(vdev);
+ complete(&vi->have_data);
vi->busy = false;
if (vi->hwrng_register_done)
hwrng_unregister(&vi->hwrng);
--
1.9.3
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