[PATCH 5/6] amdgpu/dc: convert dc_sink to kref.

[Dave Airlie]

From: Dave Airlie <airl...@redhat.com>

Refcounts use krefs.

Signed-off-by: Dave Airlie <airl...@redhat.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_sink.c | 20 ++++++++++----------
 drivers/gpu/drm/amd/display/dc/dc.h           |  2 +-
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_sink.c 
b/drivers/gpu/drm/amd/display/dc/core/dc_sink.c
index b3bbafc..f2b2e82 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_sink.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_sink.c
@@ -63,19 +63,19 @@ static bool construct(struct dc_sink *sink, const struct 
dc_sink_init_data *init
 
 void dc_sink_retain(struct dc_sink *sink)
 {
-       ASSERT(atomic_read(&sink->ref_count) > 0);
-       atomic_inc(&sink->ref_count);
+       kref_get(&sink->refcount);
 }
 
-void dc_sink_release(struct dc_sink *sink)
+static void dc_sink_free(struct kref *kref)
 {
-       ASSERT(atomic_read(&sink->ref_count) > 0);
-       atomic_dec(&sink->ref_count);
+       struct dc_sink *sink = container_of(kref, struct dc_sink, refcount);
+       destruct(sink);
+       kfree(sink);
+}
 
-       if (atomic_read(&sink->ref_count) == 0) {
-               destruct(sink);
-               kfree(sink);
-       }
+void dc_sink_release(struct dc_sink *sink)
+{
+       kref_put(&sink->refcount, dc_sink_free);
 }
 
 struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params)
@@ -88,7 +88,7 @@ struct dc_sink *dc_sink_create(const struct dc_sink_init_data 
*init_params)
        if (false == construct(sink, init_params))
                goto construct_fail;
 
-       atomic_inc(&sink->ref_count);
+       kref_init(&sink->refcount);
 
        return sink;
 
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h 
b/drivers/gpu/drm/amd/display/dc/dc.h
index abba134..31952b9 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -972,7 +972,7 @@ struct dc_sink {
        struct dc_context *ctx;
 
        /* private to dc_sink.c */
-       atomic_t ref_count;
+       struct kref refcount;
 };
 
 void dc_sink_retain(struct dc_sink *sink);
-- 
2.9.5

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