drm/vmwgfx: Nuke preclose hook

Again since the drm core takes care of event unlinking/disarming this
is now just needless code.

v2: I've completely missed eaction->fpriv_head and all the related
code. We need to nuke that too to avoid accidentally deferencing the
freed-up vmwgfx-private fpriv.

v3: Also remove vmw_fpriv->fence_events and unused variables I missed.

Cc: Thomas Hellström <thellstrom@vmware.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452548477-15905-23-git-send-email-daniel.vetter@ffwll.ch
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

4 files changed, 0 insertions, 66 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index c49812b80dd0..c96a2d2d5107 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -971,15 +971,6 @@ static int vmw_driver_unload(struct drm_device *dev)
         return 0;
 }
 
-static void vmw_preclose(struct drm_device *dev,
-                         struct drm_file *file_priv)
-{
-        struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
-        struct vmw_private *dev_priv = vmw_priv(dev);
-
-        vmw_event_fence_fpriv_gone(dev_priv->fman, &vmw_fp->fence_events);
-}
-
 static void vmw_postclose(struct drm_device *dev,
                          struct drm_file *file_priv)
 {
@@ -1010,7 +1001,6 @@ static int vmw_driver_open(struct drm_device *dev, struct drm_file *file_priv)
         if (unlikely(vmw_fp == NULL))
                 return ret;
 
-        INIT_LIST_HEAD(&vmw_fp->fence_events);
         vmw_fp->tfile = ttm_object_file_init(dev_priv->tdev, 10);
         if (unlikely(vmw_fp->tfile == NULL))
                 goto out_no_tfile;
@@ -1500,7 +1490,6 @@ static struct drm_driver driver = {
         .master_set = vmw_master_set,
         .master_drop = vmw_master_drop,
         .open = vmw_driver_open,
-        .preclose = vmw_preclose,
         .postclose = vmw_postclose,
         .set_busid = drm_pci_set_busid,
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 469cdd520615..5cb1b1687cd4 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -80,7 +80,6 @@
 struct vmw_fpriv {
         struct drm_master *locked_master;
         struct ttm_object_file *tfile;
-        struct list_head fence_events;
         bool gb_aware;
 };
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
index 37c305b62608..e959df6ede83 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
@@ -71,7 +71,6 @@ struct vmw_user_fence {
  */
 struct vmw_event_fence_action {
         struct vmw_fence_action action;
-        struct list_head fpriv_head;
 
         struct drm_pending_event *event;
         struct vmw_fence_obj *fence;
@@ -808,44 +807,6 @@ int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
 }
 
 /**
- * vmw_event_fence_fpriv_gone - Remove references to struct drm_file objects
- *
- * @fman: Pointer to a struct vmw_fence_manager
- * @event_list: Pointer to linked list of struct vmw_event_fence_action objects
- * with pointers to a struct drm_file object about to be closed.
- *
- * This function removes all pending fence events with references to a
- * specific struct drm_file object about to be closed. The caller is required
- * to pass a list of all struct vmw_event_fence_action objects with such
- * events attached. This function is typically called before the
- * struct drm_file object's event management is taken down.
- */
-void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman,
-                                struct list_head *event_list)
-{
-        struct vmw_event_fence_action *eaction;
-        struct drm_pending_event *event;
-        unsigned long irq_flags;
-
-        while (1) {
-                spin_lock_irqsave(&fman->lock, irq_flags);
-                if (list_empty(event_list))
-                        goto out_unlock;
-                eaction = list_first_entry(event_list,
-                                           struct vmw_event_fence_action,
-                                           fpriv_head);
-                list_del_init(&eaction->fpriv_head);
-                event = eaction->event;
-                eaction->event = NULL;
-                spin_unlock_irqrestore(&fman->lock, irq_flags);
-                event->destroy(event);
-        }
-out_unlock:
-        spin_unlock_irqrestore(&fman->lock, irq_flags);
-}
-
-
-/**
  * vmw_event_fence_action_seq_passed
  *
  * @action: The struct vmw_fence_action embedded in a struct
@@ -879,7 +840,6 @@ static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action)
                 *eaction->tv_usec = tv.tv_usec;
         }
 
-        list_del_init(&eaction->fpriv_head);
         drm_send_event_locked(dev, eaction->event);
         eaction->event = NULL;
         spin_unlock_irqrestore(&dev->event_lock, irq_flags);
@@ -898,12 +858,6 @@ static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action)
 {
         struct vmw_event_fence_action *eaction =
                 container_of(action, struct vmw_event_fence_action, action);
-        struct vmw_fence_manager *fman = fman_from_fence(eaction->fence);
-        unsigned long irq_flags;
-
-        spin_lock_irqsave(&fman->lock, irq_flags);
-        list_del(&eaction->fpriv_head);
-        spin_unlock_irqrestore(&fman->lock, irq_flags);
 
         vmw_fence_obj_unreference(&eaction->fence);
         kfree(eaction);
@@ -983,8 +937,6 @@ int vmw_event_fence_action_queue(struct drm_file *file_priv,
 {
         struct vmw_event_fence_action *eaction;
         struct vmw_fence_manager *fman = fman_from_fence(fence);
-        struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
-        unsigned long irq_flags;
 
         eaction = kzalloc(sizeof(*eaction), GFP_KERNEL);
         if (unlikely(eaction == NULL))
@@ -1001,10 +953,6 @@ int vmw_event_fence_action_queue(struct drm_file *file_priv,
         eaction->tv_sec = tv_sec;
         eaction->tv_usec = tv_usec;
 
-        spin_lock_irqsave(&fman->lock, irq_flags);
-        list_add_tail(&eaction->fpriv_head, &vmw_fp->fence_events);
-        spin_unlock_irqrestore(&fman->lock, irq_flags);
-
         vmw_fence_obj_add_action(fence, &eaction->action);
 
         return 0;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.h b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.h
index 8be6c29f5eb5..83ae301ee141 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.h
@@ -116,8 +116,6 @@ extern int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
                                      struct drm_file *file_priv);
 extern int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
                                  struct drm_file *file_priv);
-extern void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman,
-                                       struct list_head *event_list);
 extern int vmw_event_fence_action_queue(struct drm_file *filee_priv,
                                         struct vmw_fence_obj *fence,
                                         struct drm_pending_event *event,