drm: move dev data clearing from drm_setup to lastclose

We kzalloc this structure, and for real kms devices we should never
loose track of things really.

But ums/legacy drivers rely on the drm core to clean up a bit of cruft
between lastclose and firstopen (i.e. when X is being restarted), so
keep this around. But give it a clear drm_legacy_ prefix and
conditionalize the code on !DRIVER_MODESET.

Cc: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index cf40be42baf6..288da3dc2a09 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -171,6 +171,31 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
 #define DRM_CORE_IOCTL_COUNT	ARRAY_SIZE( drm_ioctls )
 
 /**
+ * drm_legacy_dev_reinit
+ *
+ * Reinitializes a legacy/ums drm device in it's lastclose function.
+ */
+static void drm_legacy_dev_reinit(struct drm_device *dev)
+{
+	int i;
+
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return;
+
+	atomic_set(&dev->ioctl_count, 0);
+	atomic_set(&dev->vma_count, 0);
+
+	for (i = 0; i < ARRAY_SIZE(dev->counts); i++)
+		atomic_set(&dev->counts[i], 0);
+
+	dev->sigdata.lock = NULL;
+
+	dev->context_flag = 0;
+	dev->last_context = 0;
+	dev->if_version = 0;
+}
+
+/**
  * Take down the DRM device.
  *
  * \param dev DRM device structure.
@@ -209,6 +234,8 @@ int drm_lastclose(struct drm_device * dev)
 	dev->dev_mapping = NULL;
 	mutex_unlock(&dev->struct_mutex);
 
+	drm_legacy_dev_reinit(dev);
+
 	DRM_DEBUG("lastclose completed\n");
 	return 0;
 }