1 files changed, 4 insertions, 2 deletions

diff --git a/tools/testing/selftests/intel_pstate/aperf.c b/tools/testing/selftests/intel_pstate/aperf.c
index d21edea9c560..f6cd03a87493 100644
--- a/tools/testing/selftests/intel_pstate/aperf.c
+++ b/tools/testing/selftests/intel_pstate/aperf.c
@@ -9,6 +9,8 @@
 #include <sys/timeb.h>
 #include <sched.h>
 #include <errno.h>
+#include <string.h>
+#include "../kselftest.h"
 
 void usage(char *name) {
         printf ("Usage: %s cpunum\n", name);
@@ -41,8 +43,8 @@ int main(int argc, char **argv) {
         fd = open(msr_file_name, O_RDONLY);
 
         if (fd == -1) {
-                perror("Failed to open");
-                return 1;
+                printf("/dev/cpu/%d/msr: %s\n", cpu, strerror(errno));
+                return KSFT_SKIP;
         }
 
         CPU_ZERO(&cpuset);