Simplification for previous commit.

Dave Airlie pointed out on IRC that idr_replace lets us know if the ID hasn't
been allocated, so we don't need a special pointer value for allocated IDs that
don't have valid information yet.

diff --git a/linux-core/drm_drawable.c b/linux-core/drm_drawable.c
index 7657e95..57b62ca 100644 (file)
--- a/linux-core/drm_drawable.c
+++ b/linux-core/drm_drawable.c
@@ -37,8 +37,6 @@
 
 #include "drmP.h"
 
-#define NO_DRW_INFO (void*)1
-
 /**
  * Allocate drawable ID and memory to store information about it.
  */
@@ -57,7 +55,7 @@ again:
        }
 
        spin_lock_irqsave(&dev->drw_lock, irqflags);
-       ret = idr_get_new_above(&dev->drw_idr, NO_DRW_INFO, 1, &new_id);
+       ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id);
        if (ret == -EAGAIN) {
                spin_unlock_irqrestore(&dev->drw_lock, irqflags);
                goto again;
@@ -112,15 +110,15 @@ int drm_update_drawable_info(DRM_IOCTL_ARGS)
 
        info = idr_find(&dev->drw_idr, update.handle);
        if (!info) {
-               DRM_ERROR("No such drawable %d\n", update.handle);
-               return DRM_ERR(EINVAL);
-       }
-
-       if (info == NO_DRW_INFO) {
                info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS);
                if (!info)
                        return -ENOMEM;
-               idr_replace(&dev->drw_idr, info, update.handle);
+               if (idr_replace(&dev->drw_idr, info, update.handle) ==
+                   (void*)-ENOENT) {
+                       DRM_ERROR("No such drawable %d\n", update.handle);
+                       drm_free(info, sizeof(*info), DRM_MEM_BUFS);
+                       return -EINVAL;
+               }
        }
 
        switch (update.type) {
@@ -182,21 +180,7 @@ error:
  */
 drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id)
 {
-       struct drm_drawable_info *info;
-
-       info = idr_find(&dev->drw_idr, id);
-
-       if (!info) {
-               DRM_DEBUG("No such drawable %d\n", id);
-               return NULL;
-       }
-
-       if (info == NO_DRW_INFO) {
-               DRM_DEBUG("No information for drawable %d\n", id);
-               return NULL;
-       }
-
-       return info;
+       return idr_find(&dev->drw_idr, id);
 }
 EXPORT_SYMBOL(drm_get_drawable_info);
 
@@ -204,7 +188,7 @@ static int drm_drawable_free(int idr, void *p, void *data)
 {
        struct drm_drawable_info *info = p;
 
-       if (info != NO_DRW_INFO) {
+       if (info) {
                drm_free(info->rects, info->num_rects *
                         sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
                drm_free(info, sizeof(*info), DRM_MEM_BUFS);