drm/nouveau: fix off-by-one

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_object.c b/drivers/gpu/drm/nouveau/nouveau_object.c
index fb57c11..159b7c4 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_object.c
+++ b/drivers/gpu/drm/nouveau/nouveau_object.c
@@ -125,7 +125,7 @@ nouveau_gpuobj_mthd_call2(struct drm_device *dev, int chid,
        int ret = -EINVAL;
 
        spin_lock_irqsave(&dev_priv->channels.lock, flags);
-       if (chid > 0 && chid < dev_priv->engine.fifo.channels)
+       if (chid >= 0 && chid < dev_priv->engine.fifo.channels)
                chan = dev_priv->channels.ptr[chid];
        if (chan)
                ret = nouveau_gpuobj_mthd_call(chan, class, mthd, data);