From bcef70f7e43160b4b7cca0a1ce9c64a7fc0d1e32 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 7 Dec 2016 13:09:48 +0000
Subject: Revert "lib/kselftests: Eliminate ENOTTY hack"

This reverts commit 721866d83907c8ade5d20121418261d715b145ed.

Still required for late tests as ->probe() is not allowed to return 1,
but must return a negative error code.
---
 lib/igt_kmod.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/igt_kmod.c b/lib/igt_kmod.c
index beb80b8b..388be30f 100644
--- a/lib/igt_kmod.c
+++ b/lib/igt_kmod.c
@@ -398,6 +398,9 @@ void igt_kselftests(const char *module_name,
 				if (modprobe(kmod, options))
 					err = -errno;
 				kmod_module_remove_module(kmod, 0);
+
+				if (err == -ENOTTY) /* special case */
+					err = 0;
 				if (err)
 					kmsg_dump(kmsg);
 
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