xenctx: correct error check when opening libxc

Coverity-ID: 1054979
Coverity-ID: 1055238
Signed-off-by: Matthew Daley <mattjd@gmail.com>
Reviewed-by: George Dunlap <george.dunlap@eu.citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/tools/xentrace/xenctx.c b/tools/xentrace/xenctx.c
index a86d5121e416e73480e1eabf5db68774f216043f..c4b7912f8874439c921d17a43d3fe8a079285662 100644 (file)
--- a/tools/xentrace/xenctx.c
+++ b/tools/xentrace/xenctx.c
@@ -897,7 +897,7 @@ int main(int argc, char **argv)
         read_symbol_table(symbol_table);
 
     xenctx.xc_handle = xc_interface_open(0,0,0); /* for accessing control interface */
-    if (xenctx.xc_handle < 0) {
+    if (xenctx.xc_handle == NULL) {
         perror("xc_interface_open");
         exit(-1);
     }