gpu: nvgpu: fix zcb_count

gr_gk20a_init_gr_config may be invoked several times
if gr->sw_ready is reset. Need to clear zcb_count before
summing gpc_zcb_count[gpc] to avoid ever incrementing count

Change-Id: If3bfa47ed807a3e9a5dc31f7f7f96f0c6e1fed08
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: http://git-master/r/1120772
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index a8addc7b..cc3a6813 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -3242,6 +3242,7 @@ static int gr_gk20a_init_gr_config(struct gk20a *g, struct gr_gk20a *gr)
 
         gr->ppc_count = 0;
         gr->tpc_count = 0;
+        gr->zcb_count = 0;
         for (gpc_index = 0; gpc_index < gr->gpc_count; gpc_index++) {
                 tmp = gk20a_readl(g, gr_gpc0_fs_gpc_r());