--- zzzz-none-000/linux-4.4.60/drivers/amba/bus.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/drivers/amba/bus.c	2021-02-04 17:41:59.000000000 +0000
@@ -82,7 +82,8 @@
 	struct amba_device *dev = to_amba_device(_dev);
 	char *driver_override, *old = dev->driver_override, *cp;
 
-	if (count > PATH_MAX)
+	/* We need to keep extra room for a newline */
+	if (count >= (PAGE_SIZE - 1))
 		return -EINVAL;
 
 	driver_override = kstrndup(buf, count, GFP_KERNEL);