virtio-rng: trigger timer only when guest requests for entropy
This patch triggers timer only when guest requests for entropy. As soon as first request from guest for entropy comes we set the timer. Timer bumps up the quota value when it gets triggered. Signed-off-by: NPankaj Gupta <pagupta@redhat.com> Reviewed-by: NAmit Shah <amit.shah@redhat.com> Message-Id: <1436962608-9961-2-git-send-email-pagupta@redhat.com> [Re-worded patch subject, removed extra whitespace -- Amit] Signed-off-by: NAmit Shah <amit.shah@redhat.com>
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