[patch] drm/nouveau: off by one in nouveau_drm_vblank_enable()

[Dan Carpenter]

The test here should be ">= ARRAY_SIZE()" instead of "> ARRAY_SIZE()".

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
This was introduced in git://git.freedesktop.org/git/nouveau/linux-2.6 
drm-nouveau-fixes-3.9
It hadn't hit linux-next yet yesterday.

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c 
b/drivers/gpu/drm/nouveau/nouveau_drm.c
index c95decf..e11f8e4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -86,7 +86,7 @@ nouveau_drm_vblank_enable(struct drm_device *dev, int head)
        struct nouveau_drm *drm = nouveau_drm(dev);
        struct nouveau_disp *pdisp = nouveau_disp(drm->device);

-       if (WARN_ON_ONCE(head > ARRAY_SIZE(drm->vblank)))
+       if (WARN_ON_ONCE(head >= ARRAY_SIZE(drm->vblank)))
                return -EIO;
        WARN_ON_ONCE(drm->vblank[head].func);
        drm->vblank[head].func = nouveau_drm_vblank_handler;