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>

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index cf40be4..288da3d 100644 (file)
--- 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;
 }

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 5679971..59f4592 100644 (file)
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -48,7 +48,6 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 
 static int drm_setup(struct drm_device * dev)
 {
-       int i;
        int ret;
 
        if (dev->driver->firstopen &&
@@ -58,32 +57,12 @@ static int drm_setup(struct drm_device * dev)
                        return ret;
        }
 
-       atomic_set(&dev->ioctl_count, 0);
-       atomic_set(&dev->vma_count, 0);
-
-       i = drm_legacy_dma_setup(dev);
-       if (i < 0)
-               return i;
-
-       for (i = 0; i < ARRAY_SIZE(dev->counts); i++)
-               atomic_set(&dev->counts[i], 0);
-
-       dev->sigdata.lock = NULL;
+       ret = drm_legacy_dma_setup(dev);
+       if (ret < 0)
+               return ret;
 
-       dev->context_flag = 0;
-       dev->last_context = 0;
-       dev->if_version = 0;
 
        DRM_DEBUG("\n");
-
-       /*
-        * The kernel's context could be created here, but is now created
-        * in drm_dma_enqueue.  This is more resource-efficient for
-        * hardware that does not do DMA, but may mean that
-        * drm_select_queue fails between the time the interrupt is
-        * initialized and the time the queues are initialized.
-        */
-
        return 0;
 }