1 files changed, 5 insertions, 4 deletions

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 827e4800d862..c37a78677955 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -23,6 +23,7 @@
 #include "util/time-utils.h"
 #include "util/annotate.h"
 #include "util/map.h"
+#include <linux/err.h>
 #include <linux/zalloc.h>
 #include <subcmd/pager.h>
 #include <subcmd/parse-options.h>
@@ -1153,9 +1154,9 @@ static int check_file_brstack(void)
 
         data__for_each_file(i, d) {
                 d->session = perf_session__new(&d->data, false, &pdiff.tool);
-                if (!d->session) {
+                if (IS_ERR(d->session)) {
                         pr_err("Failed to open %s\n", d->data.path);
-                        return -1;
+                        return PTR_ERR(d->session);
                 }
 
                 has_br_stack = perf_header__has_feat(&d->session->header,
@@ -1185,9 +1186,9 @@ static int __cmd_diff(void)
 
         data__for_each_file(i, d) {
                 d->session = perf_session__new(&d->data, false, &pdiff.tool);
-                if (!d->session) {
+                if (IS_ERR(d->session)) {
+                        ret = PTR_ERR(d->session);
                         pr_err("Failed to open %s\n", d->data.path);
-                        ret = -1;
                         goto out_delete;
                 }