From: Marc-André Lureau <marcandre.lureau@redhat.com>
Date: Fri, 17 Jul 2015 13:32:03 +0000 (+0200)
Subject: vhost: actually track log eventfd file
X-Git-Tag: firefly_0821_release~3679^2~202
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bde8e916ed7bfbb694792335043938e206636943;p=firefly-linux-kernel-4.4.55.git

vhost: actually track log eventfd file

commit 7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5 upstream.

While reviewing vhost log code, I found out that log_file is never
set. Note: I haven't tested the change (QEMU doesn't use LOG_FD yet).

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 60aa5ad09a2f..3aabc652f1b9 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -855,6 +855,7 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
 		}
 		if (eventfp != d->log_file) {
 			filep = d->log_file;
+			d->log_file = eventfp;
 			ctx = d->log_ctx;
 			d->log_ctx = eventfp ?
 				eventfd_ctx_fileget(eventfp) : NULL;