drm/nouveau: fix suspend/resume on GPUs that don't have PM support

This has been broken since 2.6.37, and fixes resume on a couple of fermi
boards I have access to.

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

diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.c b/drivers/gpu/drm/nouveau/nouveau_pm.c
index f05c0cd..4399e2f 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_pm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.c
@@ -543,7 +543,7 @@ nouveau_pm_resume(struct drm_device *dev)
        struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
        struct nouveau_pm_level *perflvl;
 
-       if (pm->cur == &pm->boot)
+       if (!pm->cur || pm->cur == &pm->boot)
                return;
 
        perflvl = pm->cur;