From 62d1a752874962f072de8a779e960fcd2ab4847b Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 28 Nov 2018 15:09:27 -0800
Subject: drm/v3d: Fix prime imports of buffers from other drivers.
Git-commit: 62d1a752874962f072de8a779e960fcd2ab4847b
Patch-mainline: v5.0-rc1
References: bsc#1113956

v3d_bo_get_pages() checks this to decide to map the imported buffer
instead of the backing shmem file.  The caller was about to set this
value anyway, and there's no error path in between.  Ideally we
wouldn't even allocate the shmem file for our imports, but that's a
more invasive fix.

Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: 57692c94dcbe ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+")
Link: https://patchwork.freedesktop.org/patch/msgid/20181128230927.10951-3-eric@anholt.net
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Dave Emett <david.emett@broadcom.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/v3d/v3d_bo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c
index 54d96518a131..a08766d39eab 100644
--- a/drivers/gpu/drm/v3d/v3d_bo.c
+++ b/drivers/gpu/drm/v3d/v3d_bo.c
@@ -293,6 +293,7 @@ v3d_prime_import_sg_table(struct drm_device *dev,
 	bo->resv = attach->dmabuf->resv;
 
 	bo->sgt = sgt;
+	obj->import_attach = attach;
 	v3d_bo_get_pages(bo);
 
 	v3d_mmu_insert_ptes(bo);
-- 
2.20.1