Reviewed-by: Roger He <hongbo...@amd.com>

-----Original Message-----
From: amd-gfx [mailto:amd-gfx-boun...@lists.freedesktop.org] On Behalf Of 
Christian K?nig
Sent: Tuesday, February 20, 2018 8:58 PM
To: amd-...@lists.freedesktop.org; dri-de...@lists.freedesktop.org; 
linux-kernel@vger.kernel.org
Subject: [PATCH 2/4] drm/amdgpu: use new ww_mutex_is_owned_by function

Instead of accessing ww_mutex internals directly use the provided function to 
check if the ww_mutex was indeed locked by the current command submission.

Signed-off-by: Christian K├Ânig <christian.koe...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index eaa3cb0c3ad1..6db26a3144dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1594,7 +1594,7 @@ int amdgpu_cs_find_mapping(struct amdgpu_cs_parser 
*parser,
        *map = mapping;
 
        /* Double check that the BO is reserved by this CS */
-       if (READ_ONCE((*bo)->tbo.resv->lock.ctx) != &parser->ticket)
+       if (!ww_mutex_is_owned_by(&(*bo)->tbo.resv->lock, &parser->ticket))
                return -EINVAL;
 
        if (!((*bo)->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)) {
--
2.14.1

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