[PATCH] drm/managed: Fix off-by-one in warning

[Daniel Vetter]

I'm thinking this is the warning that fired in the 0day report, but I
can't double-check yet since 0day didn't upload its source tree
anywhere I can check. And all the drivers I can easily test don't use
drm_dev_alloc anymore ...

Also if I'm correct supreme amounts of bad luck because usually kslap
(for bigger structures) gives us something quite a bit bigger than
what we asked for.

Reported-by: kernel test robot <lkp at intel.com>
Fixes: c6603c740e0e ("drm: add managed resources tied to drm_device")
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Dan Carpenter <dan.carpenter at oracle.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Neil Armstrong <narmstrong at baylibre.com
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael at kernel.org>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/drm_managed.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
index 4955241ceb4c..9cebfe370a65 100644
--- a/drivers/gpu/drm/drm_managed.c
+++ b/drivers/gpu/drm/drm_managed.c
@@ -139,8 +139,7 @@ void drmm_add_final_kfree(struct drm_device *dev, void *container)
 {
 	WARN_ON(dev->managed.final_kfree);
 	WARN_ON(dev < (struct drm_device *) container);
-	WARN_ON(dev + 1 >=
-		(struct drm_device *) (container + ksize(container)));
+	WARN_ON(dev + 1 > (struct drm_device *) (container + ksize(container)));
 	dev->managed.final_kfree = container;
 }
 EXPORT_SYMBOL(drmm_add_final_kfree);
-- 
2.25.1