From: Wei Liu <wei.liu2@citrix.com>
Date: Mon, 18 Sep 2017 13:56:13 +0000 (+0100)
Subject: libxl: use libxl__read_xenstore_mandatory in vdispl function
X-Git-Tag: 4.10.0-rc1~305
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=2655a0821609fc9aad6b725b3e604fb948d8d16d;p=xen.git

libxl: use libxl__read_xenstore_mandatory in vdispl function

Coverity-ID: 1418097

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
---

diff --git a/tools/libxl/libxl_vdispl.c b/tools/libxl/libxl_vdispl.c
index 5740c89fad..befc56bdeb 100644
--- a/tools/libxl/libxl_vdispl.c
+++ b/tools/libxl/libxl_vdispl.c
@@ -40,10 +40,14 @@ static int libxl__vdispl_from_xenstore(libxl__gc *gc, const char *libxl_path,
                                        libxl_devid devid,
                                        libxl_device_vdispl *vdispl)
 {
-    char *be_path;
+    const char *be_path;
+    int rc;
 
     vdispl->devid = devid;
-    be_path = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/backend", libxl_path));
+    rc = libxl__xs_read_mandatory(gc, XBT_NULL,
+                                  GCSPRINTF("%s/backend", libxl_path),
+                                  &be_path);
+    if (rc) return rc;
 
     return libxl__backendpath_parse_domid(gc, be_path, &vdispl->backend_domid);
 }