[Nouveau] [PATCH 01/10] drm/nouveau/nvkm: fini object children in reverse order

[Ben Skeggs]

From: Ben Skeggs <bskeggs at redhat.com>

Turns out, we're currently tearing down the disp core channel *before*
the satellite channels (wndw, etc) during suspend.

This makes RM return NV_ERR_NOT_SUPPORTED on attempting to reallocate
the core channel on resume for some reason, but we probably shouldn't
be doing it on HW either.

Tear down children in the reverse of allocation order instead.

Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
---
 drivers/gpu/drm/nouveau/nvkm/core/object.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/core/object.c b/drivers/gpu/drm/nouveau/nvkm/core/object.c
index 301a5e5b5f7f..7c554c14e884 100644
--- a/drivers/gpu/drm/nouveau/nvkm/core/object.c
+++ b/drivers/gpu/drm/nouveau/nvkm/core/object.c
@@ -185,7 +185,7 @@ nvkm_object_fini(struct nvkm_object *object, bool suspend)
 
 	nvif_debug(object, "%s children...\n", action);
 	time = ktime_to_us(ktime_get());
-	list_for_each_entry(child, &object->tree, head) {
+	list_for_each_entry_reverse(child, &object->tree, head) {
 		ret = nvkm_object_fini(child, suspend);
 		if (ret && suspend)
 			goto fail_child;
-- 
2.40.1