[PATCH 2/4] drm/amdgpu: use new ww_mutex_is_owned_by function

From: Christian KÃnig
Date: Mon Feb 19 2018 - 04:57:08 EST


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 KÃnig <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index eaa3cb0c3ad1..4c04b560e358 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1594,7 +1594,8 @@ 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, current,
+ &parser->ticket))
return -EINVAL;

if (!((*bo)->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)) {
--
2.14.1