[src/trunk]: src/sys/external/bsd/drm2/dist/drm drm_mm: Match __drm_mm_interv...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ebbdebff67fd
branches:  trunk
changeset: 369781:ebbdebff67fd
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Thu Sep 01 01:54:28 2022 +0000

description:
drm_mm: Match __drm_mm_interval_first semantics.

- Use the right search criterion.
- Return &mm->head_node, not NULL, if not found.

diffstat:

 sys/external/bsd/drm2/dist/drm/drm_mm.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (31 lines):

diff -r 797c1fb133d1 -r ebbdebff67fd sys/external/bsd/drm2/dist/drm/drm_mm.c
--- a/sys/external/bsd/drm2/dist/drm/drm_mm.c   Wed Aug 31 14:00:44 2022 +0000
+++ b/sys/external/bsd/drm2/dist/drm/drm_mm.c   Thu Sep 01 01:54:28 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: drm_mm.c,v 1.18 2022/02/14 13:22:30 riastradh Exp $    */
+/*     $NetBSD: drm_mm.c,v 1.19 2022/09/01 01:54:28 riastradh Exp $    */
 
 /**************************************************************************
  *
@@ -45,7 +45,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: drm_mm.c,v 1.18 2022/02/14 13:22:30 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: drm_mm.c,v 1.19 2022/09/01 01:54:28 riastradh Exp $");
 
 #include <linux/export.h>
 #include <linux/interval_tree_generic.h>
@@ -170,10 +170,10 @@
 #ifdef __NetBSD__
        struct drm_mm_node *node;
        list_for_each_entry(node, &mm->head_node.node_list, node_list) {
-               if (node->start <= start)
+               if (start <= LAST(node) && START(node) <= last)
                        return node;
        }
-       return NULL;
+       return &mm->head_node;
 #else
        return drm_mm_interval_tree_iter_first((struct rb_root_cached *)&mm->interval_tree,
                                               start, last) ?: (struct drm_mm_node *)&mm->head_node;