diff --git a/src/freedreno/common/freedreno_dev_info.c b/src/freedreno/common/freedreno_dev_info.c
index 8b217b3186a..ca27bc433e8 100644
--- a/src/freedreno/common/freedreno_dev_info.c
+++ b/src/freedreno/common/freedreno_dev_info.c
@@ -36,22 +36,25 @@ struct fd_dev_rec {
 
 #include "freedreno_devices.h"
 
+/**
+ * Compare device 'id' against reference id ('ref') from gpu table.
+ */
 static bool
-dev_id_compare(const struct fd_dev_id *a, const struct fd_dev_id *b)
+dev_id_compare(const struct fd_dev_id *ref, const struct fd_dev_id *id)
 {
-   if (a->gpu_id && b->gpu_id) {
-      return a->gpu_id == b->gpu_id;
+   if (ref->gpu_id && id->gpu_id) {
+      return ref->gpu_id == id->gpu_id;
    } else {
-      assert(a->chip_id && b->chip_id);
+      assert(ref->chip_id && id->chip_id);
       /* Match on either:
        * (a) exact match
        * (b) device table entry has 0xff wildcard patch_id and core/
        *     major/minor match
        */
-      return (a->chip_id == b->chip_id) ||
-             (((a->chip_id & 0xff) == 0xff) &&
-              ((a->chip_id & UINT64_C(0xffffff00)) ==
-               (b->chip_id & UINT64_C(0xffffff00))));
+      return (ref->chip_id == id->chip_id) ||
+             (((ref->chip_id & 0xff) == 0xff) &&
+              ((ref->chip_id & UINT64_C(0xffffff00)) ==
+               (id->chip_id & UINT64_C(0xffffff00))));
    }
 }