1 files changed, 4 insertions, 3 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index bc577dcc0e47..a610ca771558 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2377,9 +2377,10 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf,
         int i;
         size_t ret;
 
+        ret = cnt;
+
         if (cnt > max_tracer_type_len)
                 cnt = max_tracer_type_len;
-        ret = cnt;
 
         if (copy_from_user(&buf, ubuf, cnt))
                 return -EFAULT;
@@ -2412,8 +2413,8 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf,
  out:
         mutex_unlock(&trace_types_lock);
 
-        if (ret == cnt)
-                filp->f_pos += cnt;
+        if (ret > 0)
+                filp->f_pos += ret;
 
         return ret;
 }