drm: move drm authentication to new generic hash table.

Fix drm_remove_magic potential memory leak / corruption. Move drm
authentication token hashing to new generic hash table implementation.

Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index c93985bb91a2..fedaf013f848 100644
--- a/drivers/char/drm/drmP.h
+++ b/drivers/char/drm/drmP.h
@@ -105,7 +105,7 @@
 #define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
                                      also include looping detection. */
 
-#define DRM_HASH_SIZE         16 /**< Size of key hash table. Must be power of 2. */
+#define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
 #define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
 #define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
 #define DRM_LOOPING_LIMIT     5000000
@@ -277,7 +277,8 @@ typedef struct drm_devstate {
 } drm_devstate_t;
 
 typedef struct drm_magic_entry {
-        drm_magic_t magic;
+        drm_hash_item_t hash_item;
+        struct list_head head;
         struct drm_file *priv;
         struct drm_magic_entry *next;
 } drm_magic_entry_t;
@@ -653,7 +654,8 @@ typedef struct drm_device {
         /*@{ */
         drm_file_t *file_first;         /**< file list head */
         drm_file_t *file_last;          /**< file list tail */
-        drm_magic_head_t magiclist[DRM_HASH_SIZE];      /**< magic hash table */
+        drm_open_hash_t magiclist;      /**< magic hash table */
+        struct list_head magicfree;
         /*@} */
 
         /** \name Memory management */