Messages in this thread Patch in this message | | | From | David Woodhouse <> | Subject | [PATCH 2/3] vfio/virqfd: Drain events from eventfd in virqfd_wakeup() | Date | Tue, 27 Oct 2020 13:55:22 +0000 |
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From: David Woodhouse <dwmw@amazon.co.uk>
Don't allow the events to accumulate in the eventfd counter, drain them as they are handled.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> --- drivers/vfio/virqfd.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/vfio/virqfd.c b/drivers/vfio/virqfd.c index 997cb5d0a657..414e98d82b02 100644 --- a/drivers/vfio/virqfd.c +++ b/drivers/vfio/virqfd.c @@ -46,6 +46,9 @@ static int virqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void __poll_t flags = key_to_poll(key); if (flags & EPOLLIN) { + u64 cnt; + eventfd_ctx_do_read(virqfd->eventfd, &cnt); + /* An event has been signaled, call function */ if ((!virqfd->handler || virqfd->handler(virqfd->opaque, virqfd->data)) && -- 2.26.2
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