gpu: nvgpu: use new List APIs to free channels

Use new APIs from <nvgpu/list.h> to access free
channel list

Define channel_gk20a_from_free_chs() to convert
a list node to struct channel_gk20a

Jira NVGPU-13

Change-Id: Idaf58f04be1c7fc553bea7c8de45951bf82bb340
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1303025
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
index d530f47d..fd36ff1f 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
@@ -25,6 +25,7 @@
 #include <linux/stacktrace.h>
 #include <linux/wait.h>
 #include <uapi/linux/nvgpu.h>
+#include <nvgpu/list.h>
 
 #include <nvgpu/lock.h>
 #include <nvgpu/timers.h>
@@ -157,7 +158,7 @@ struct channel_gk20a_ref_action {
 struct channel_gk20a {
         struct gk20a *g; /* set only when channel is active */
 
-        struct list_head free_chs;
+        struct nvgpu_list_node free_chs;
 
         struct nvgpu_spinlock ref_obtain_lock;
         bool referenceable;
@@ -270,6 +271,13 @@ struct channel_gk20a {
         bool is_privileged_channel;
 };
 
+static inline struct channel_gk20a *
+channel_gk20a_from_free_chs(struct nvgpu_list_node *node)
+{
+        return (struct channel_gk20a *)
+                   ((uintptr_t)node - offsetof(struct channel_gk20a, free_chs));
+};
+
 static inline bool gk20a_channel_as_bound(struct channel_gk20a *ch)
 {
         return !!ch->vm;