gpu: nvgpu: skip comptag re-initialization

In case we need to re-initialize GR after floorsweeping TPC,
gp10b_ltc_init_comptags() will try to allocate comptag memory again

Skip this during re-initialization since it is unnecessary to
re-allocate all those buffers

Comptag buffer size is 33MB and reallocating causes huge memory leak
anyways

Bug 2031635

Change-Id: I935f96eb133283d6f935589c0e581e0997e980e2
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1634737
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c b/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
index bf95f1fd..d191d778 100644
--- a/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
@@ -1,7 +1,7 @@
 /*
  * GP10B L2
  *
- * Copyright (c) 2014-2017, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2018, NVIDIA CORPORATION.  All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -88,6 +88,10 @@ int gp10b_ltc_init_comptags(struct gk20a *g, struct gr_gk20a *gr)
         if (max_comptag_lines == 0)
                 return 0;
 
+        /* Already initialized */
+        if (gr->cacheline_size)
+                return 0;
+
         if (max_comptag_lines > hw_max_comptag_lines)
                 max_comptag_lines = hw_max_comptag_lines;