---

yaml
---
r: 210079
b: refs/heads/master
c: 7521473
h: refs/heads/master
i:
  210077: 644287a
  210075: 79742e3
  210071: 84f731d
  210063: 47d1386
  210047: 6461ab6
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5afda9e9a4625d771795a5f540fb202eec08a49c
+refs/heads/master: 7521473305f1379403b893a30ac09a2132dc1e25

trunk/drivers/gpu/drm/drm_mm.c

@@ -285,21 +285,21 @@ void drm_mm_put_block(struct drm_mm_node *cur)
 
 EXPORT_SYMBOL(drm_mm_put_block);
 
-static int check_free_mm_node(struct drm_mm_node *entry, unsigned long size,
-			      unsigned alignment)
+static int check_free_hole(unsigned long start, unsigned long end,
+			   unsigned long size, unsigned alignment)
 {
 	unsigned wasted = 0;
 
-	if (entry->size < size)
+	if (end - start < size)
 		return 0;
 
 	if (alignment) {
-		register unsigned tmp = entry->start % alignment;
+		unsigned tmp = start % alignment;
 		if (tmp)
 			wasted = alignment - tmp;
 	}
 
-	if (entry->size >= size + wasted) {
+	if (end >= start + size + wasted) {
 		return 1;
 	}
 
@@ -320,7 +320,8 @@ struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
 	best_size = ~0UL;
 
 	list_for_each_entry(entry, &mm->free_stack, free_stack) {
-		if (!check_free_mm_node(entry, size, alignment))
+		if (!check_free_hole(entry->start, entry->start + entry->size,
+				     size, alignment))
 			continue;
 
 		if (!best_match)
@@ -353,10 +354,12 @@ struct drm_mm_node *drm_mm_search_free_in_range(const struct drm_mm *mm,
 	best_size = ~0UL;
 
 	list_for_each_entry(entry, &mm->free_stack, free_stack) {
-		if (entry->start > end || (entry->start+entry->size) < start)
-			continue;
+		unsigned long adj_start = entry->start < start ?
+			start : entry->start;
+		unsigned long adj_end = entry->start + entry->size > end ?
+			end : entry->start + entry->size;
 
-		if (!check_free_mm_node(entry, size, alignment))
+		if (!check_free_hole(adj_start, adj_end, size, alignment))
 			continue;
 
 		if (!best_match)
@@ -449,7 +452,8 @@ int drm_mm_scan_add_block(struct drm_mm_node *node)
 	node->free_stack.prev = prev_free;
 	node->free_stack.next = next_free;
 
-	if (check_free_mm_node(node, mm->scan_size, mm->scan_alignment)) {
+	if (check_free_hole(node->start, node->start + node->size,
+			    mm->scan_size, mm->scan_alignment)) {
 		mm->scan_hit_start = node->start;
 		mm->scan_hit_size = node->size;