drm/i915: unload: ensure that gem is idle

When the module unloads, all users should be gone, hence all bo references
held by userspace, too. This should already result in an idle ringbuffer.
Still, be paranoid and idle gem before starting the unload dance.

Also kill the call to i915_gem_lastclose under an if (kms), it's a noop
for kms.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 27a826e3170ad1b38496f08f3f951282858e82cd..14133ebef33b70489bba02f50654653a2a33839b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -2249,11 +2249,18 @@ free_priv:
 int i915_driver_unload(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
+       int ret;
 
        spin_lock(&mchdev_lock);
        i915_mch_dev = NULL;
        spin_unlock(&mchdev_lock);
 
+       mutex_lock(&dev->struct_mutex);
+       ret = i915_gpu_idle(dev);
+       if (ret)
+               DRM_ERROR("failed to idle hardware: %d\n", ret);
+       mutex_unlock(&dev->struct_mutex);
+
        io_mapping_free(dev_priv->mm.gtt_mapping);
        if (dev_priv->mm.gtt_mtrr >= 0) {
                mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
@@ -2303,7 +2310,6 @@ int i915_driver_unload(struct drm_device *dev)
                if (I915_HAS_FBC(dev) && i915_powersave)
                        i915_cleanup_compression(dev);
                drm_mm_takedown(&dev_priv->vram);
-               i915_gem_lastclose(dev);
 
                intel_cleanup_overlay(dev);
        }