1 files changed, 2 insertions, 1 deletions

diff --git a/include/asm-x86/dmi.h b/include/asm-x86/dmi.h
index 8e2b0e6aa8e7..5008c365e6e4 100644
--- a/include/asm-x86/dmi.h
+++ b/include/asm-x86/dmi.h
@@ -22,8 +22,9 @@ extern char dmi_alloc_data[DMI_MAX_DATA];
 static inline void *dmi_alloc(unsigned len)
 {
         int idx = dmi_alloc_index;
-        if ((dmi_alloc_index += len) > DMI_MAX_DATA)
+        if ((dmi_alloc_index + len) > DMI_MAX_DATA)
                 return NULL;
+        dmi_alloc_index += len;
         return dmi_alloc_data + idx;
 }