drm/radeon/kms: small memory leak in atom exit code

This is an unlikely memory leak, but we may as well fix it.  It's easy
to fix and every static checker will complain if we don't.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Reviewed-by: NMatt Turner <mattst88@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/atom.c

@@ -1136,6 +1136,7 @@ static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32
 	int len, ws, ps, ptr;
 	unsigned char op;
 	atom_exec_context ectx;
+	int ret = 0;
 
 	if (!base)
 		return -EINVAL;
@@ -1168,7 +1169,8 @@ static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32
 		if (ectx.abort) {
 			DRM_ERROR("atombios stuck executing %04X (len %d, WS %d, PS %d) @ 0x%04X\n",
 				base, len, ws, ps, ptr - 1);
-			return -EINVAL;
+			ret = -EINVAL;
+			goto free;
 		}
 
 		if (op < ATOM_OP_CNT && op > 0)
@@ -1183,9 +1185,10 @@ static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32
 	debug_depth--;
 	SDEBUG("<<\n");
 
+free:
 	if (ws)
 		kfree(ectx.ws);
-	return 0;
+	return ret;
 }
 
 int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params)