LU-9859 libcfs: always range-check libcfs_debug_mb setting.

[fs/lustre-release.git] / libcfs / libcfs / debug.c

diff --git a/libcfs/libcfs/debug.c b/libcfs/libcfs/debug.c
index 99518ab..e5bff2e 100644 (file)
--- a/libcfs/libcfs/debug.c
+++ b/libcfs/libcfs/debug.c
@@ -65,21 +65,15 @@ static int libcfs_param_debug_mb_set(const char *val,
        if (rc < 0)
                return rc;
 
-/*
- * RHEL6 does not support any kind of locking so we have to provide
- * our own
- */
-       if (!*((unsigned int *)kp->arg)) {
-               *((unsigned int *)kp->arg) = num;
-               return 0;
-       }
+       num = cfs_trace_set_debug_mb(num);
 
-       rc = cfs_trace_set_debug_mb(num);
-
-       if (!rc)
-               *((unsigned int *)kp->arg) = cfs_trace_get_debug_mb();
+       *((unsigned int *)kp->arg) = num;
+       num = cfs_trace_get_debug_mb();
+       if (num)
+               /* This value is more precise */
+               *((unsigned int *)kp->arg) = num;
 
-       return rc;
+       return 0;
 }
 
 /*