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 60aa5ad09a2fdb74a457ecadf0130f056f114c8e..3aabc652f1b945a455c6fe1231546dc8f043878d 100644 (file)
--- 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;