selftests/resctrl: Check for return value after write_schemata()

MBA test case writes schemata but it does not check if the write is
successful or not.

Add the error check and return error properly.

Fixes: 01fee6b4d1f9 ("selftests/resctrl: Add MBA test")
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index f32289a..97dc98c 100644 (file)
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -28,6 +28,7 @@ static int mba_setup(int num, ...)
        struct resctrl_val_param *p;
        char allocation_str[64];
        va_list param;
+       int ret;
 
        va_start(param, num);
        p = va_arg(param, struct resctrl_val_param *);
@@ -45,7 +46,11 @@ static int mba_setup(int num, ...)
 
        sprintf(allocation_str, "%d", allocation);
 
-       write_schemata(p->ctrlgrp, allocation_str, p->cpu_no, p->resctrl_val);
+       ret = write_schemata(p->ctrlgrp, allocation_str, p->cpu_no,
+                            p->resctrl_val);
+       if (ret < 0)
+               return ret;
+
        allocation -= ALLOCATION_STEP;
 
        return 0;