From: jsg <jsg@openbsd.org>
Date: Fri, 4 Aug 2023 08:58:34 +0000 (+0000)
Subject: drm/ttm: never consider pinned BOs for eviction&swap
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=26c6fd031ef957c41aa72906b692f5cd114999d2;p=openbsd

drm/ttm: never consider pinned BOs for eviction&swap

From Christian Koenig
17e188e0feb008bab5f4b083083dff7cdc633ca1 in linux-6.1.y/6.1.43
a2848d08742c8e8494675892c02c0d22acbe3cf8 in mainline linux
---

diff --git a/sys/dev/pci/drm/ttm/ttm_bo.c b/sys/dev/pci/drm/ttm/ttm_bo.c
index 48476da8e07..7959f645a75 100644
--- a/sys/dev/pci/drm/ttm/ttm_bo.c
+++ b/sys/dev/pci/drm/ttm/ttm_bo.c
@@ -550,6 +550,12 @@ static bool ttm_bo_evict_swapout_allowable(struct ttm_buffer_object *bo,
 {
 	bool ret = false;
 
+	if (bo->pin_count) {
+		*locked = false;
+		*busy = false;
+		return false;
+	}
+
 	if (bo->base.resv == ctx->resv) {
 		dma_resv_assert_held(bo->base.resv);
 		if (ctx->allow_res_evict)