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authorDaniel Vetter <daniel.vetter@ffwll.ch>2011-02-18 17:59:15 +0100
committerDave Airlie <airlied@redhat.com>2011-02-23 10:32:57 +1000
commitae0cec2880a4dc6d90c7f8392bdc6705988389ca (patch)
tree02a36c6ff5eb3e9f0554d9b5134ab374929c61fb /drivers/gpu/drm/drm_mm.c
parentb0b7af1884b7d807a3504804f9825d472de78708 (diff)
drm: mm: add helper to unwind scan state
With the switch to implicit free space accounting one pointer got unused when scanning. Use it to create a single-linked list to ensure correct unwinding of the scan state. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_mm.c')
-rw-r--r--drivers/gpu/drm/drm_mm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index d6432f9e49c1..add1737dae0d 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -460,6 +460,7 @@ void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
mm->scan_hit_start = 0;
mm->scan_hit_size = 0;
mm->scan_check_range = 0;
+ mm->prev_scanned_node = NULL;
}
EXPORT_SYMBOL(drm_mm_init_scan);
@@ -485,6 +486,7 @@ void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
mm->scan_start = start;
mm->scan_end = end;
mm->scan_check_range = 1;
+ mm->prev_scanned_node = NULL;
}
EXPORT_SYMBOL(drm_mm_init_scan_with_range);
@@ -514,6 +516,8 @@ int drm_mm_scan_add_block(struct drm_mm_node *node)
prev_node->hole_follows = 1;
list_del(&node->node_list);
node->node_list.prev = &prev_node->node_list;
+ node->node_list.next = &mm->prev_scanned_node->node_list;
+ mm->prev_scanned_node = node;
hole_start = drm_mm_hole_node_start(prev_node);
hole_end = drm_mm_hole_node_end(prev_node);