From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Fri, 14 Feb 2020 17:17:09 +0000 (+0000)
Subject: aio-posix: don't pass ns timeout to epoll_wait()
X-Git-Tag: qemu-xen-4.14.0~129^2~25
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=ca8c6b22754b0f17818b1d1910d31f0aa1a49cc7;p=qemu-xen.git

aio-posix: don't pass ns timeout to epoll_wait()

Don't pass the nanosecond timeout into epoll_wait(), which expects
milliseconds.

The epoll_wait() timeout value does not matter if qemu_poll_ns()
determined that the poll fd is ready, but passing a value in the wrong
units is still ugly.  Pass a 0 timeout to epoll_wait() instead.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-id: 20200214171712.541358-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---

diff --git a/util/aio-posix.c b/util/aio-posix.c
index c964627a03..58765e581e 100644
--- a/util/aio-posix.c
+++ b/util/aio-posix.c
@@ -117,6 +117,9 @@ static int aio_epoll(AioContext *ctx, int64_t timeout)
 
     if (timeout > 0) {
         ret = qemu_poll_ns(&pfd, 1, timeout);
+        if (ret > 0) {
+            timeout = 0;
+        }
     }
     if (timeout <= 0 || ret > 0) {
         ret = epoll_wait(ctx->epollfd, events,