linux-kernel - [PATCH v2 15/15] drm/bochs: reserve bo for pin/unpin

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Message-Id: <20190108112519.27473-16-kraxel@redhat.com>
Date:   Tue,  8 Jan 2019 12:25:19 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org, David Airlie <airlied@...hat.com>
Cc:     andr2000@...il.com, Gerd Hoffmann <kraxel@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        virtualization@...ts.linux-foundation.org (open list:DRM DRIVER FOR
        BOCHS VIRTUAL GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 15/15] drm/bochs: reserve bo for pin/unpin

The buffer object must be reserved before calling
ttm_bo_validate for pinning/unpinning.

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/bochs/bochs_mm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c
index cfe061c25f..970a591908 100644
--- a/drivers/gpu/drm/bochs/bochs_mm.c
+++ b/drivers/gpu/drm/bochs/bochs_mm.c
@@ -223,7 +223,11 @@ int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag)
 	bochs_ttm_placement(bo, pl_flag);
 	for (i = 0; i < bo->placement.num_placement; i++)
 		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
+	ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
+	if (ret)
+		return ret;
 	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
+	ttm_bo_unreserve(&bo->bo);
 	if (ret)
 		return ret;
 
@@ -247,7 +251,11 @@ int bochs_bo_unpin(struct bochs_bo *bo)
 
 	for (i = 0; i < bo->placement.num_placement; i++)
 		bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
+	ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
+	if (ret)
+		return ret;
 	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
+	ttm_bo_unreserve(&bo->bo);
 	if (ret)
 		return ret;
 
-- 
2.9.3