gpu: nvgpu: remove unbind from debug session bind call

While binding a channel to debug session in dbg_bind_channel_gk20a(),
we unbind the channel if channel fd is ~0

But UMD has already moved to use separate IOCTL to unbind a channel
from debug session
Hence this code can be removed now

Bug 1646259

Change-Id: I9e53e4b4c79fbf5468fe083c5b265a84d9695841
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1146852
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 16 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c b/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c
index afc1517b..520a2ffd 100644
--- a/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c
@@ -497,27 +497,12 @@ static int dbg_bind_channel_gk20a(struct dbg_session_gk20a *dbg_s,
         struct file *f;
         struct gk20a *g = dbg_s->g;
         struct channel_gk20a *ch;
-        struct dbg_session_channel_data *ch_data, *tmp;
+        struct dbg_session_channel_data *ch_data;
         struct dbg_session_data *session_data;
 
         gk20a_dbg(gpu_dbg_fn|gpu_dbg_gpu_dbg, "%s fd=%d",
                    dev_name(dbg_s->dev), args->channel_fd);
 
-        if (args->channel_fd == ~0) {
-                ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
-                if (!ch)
-                        return -EINVAL;
-
-                mutex_lock(&dbg_s->ch_list_lock);
-                list_for_each_entry_safe(ch_data, tmp,
-                                         &dbg_s->ch_list, ch_entry) {
-                        if (ch_data->chid == ch->hw_chid)
-                                dbg_unbind_single_channel_gk20a(dbg_s, ch_data);
-                }
-                mutex_unlock(&dbg_s->ch_list_lock);
-                return 0;
-        }
-
         /* even though get_file_channel is doing this it releases it as well */
         /* by holding it here we'll keep it from disappearing while the
          * debugger is in session */