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From 82f0617058cea10448daf9d1797aff83854d2201 Mon Sep 17 00:00:00 2001
From: Yong Zhao <yong.zhao@amd.com>
Date: Mon, 4 Apr 2016 19:14:20 -0400
Subject: [PATCH 0827/4131] Adaption drm/amdgpu: Make
amdgpu_ttm_tt_get_user_pages work in kernel thread
Change-Id: If43cf709ad22bae24979940b17226e903af20f54
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 834b8fb..48e1ca2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1057,7 +1057,10 @@ struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
if (gtt == NULL)
return NULL;
- return gtt->usermm;
+ if (gtt->usertask == NULL)
+ return NULL;
+
+ return gtt->usertask->mm;
}
bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
--
2.7.4
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