gpu: nvgpu: Do not enable lbreq interrupt

Lbreq interrupt can assert when there is memory back pressure. Do not
enable it as either stalling or nonstalling interrupt.

Bug 1498688

Change-Id: I02f94a64ab9df82402d80a632450d87457644d50
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/408040
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index 2d2dad2c..8be2176d 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -398,9 +398,10 @@ int gk20a_init_fifo_reset_enable_hw(struct gk20a *g)
                 gk20a_writel(g, pbdma_intr_stall_r(i), intr_stall);
                 gk20a_writel(g, pbdma_intr_0_r(i), 0xFFFFFFFF);
                 gk20a_writel(g, pbdma_intr_en_0_r(i),
-                        (~0) & ~pbdma_intr_en_0_lbreq_enabled_f());
+                        ~pbdma_intr_en_0_lbreq_enabled_f());
                 gk20a_writel(g, pbdma_intr_1_r(i), 0xFFFFFFFF);
-                gk20a_writel(g, pbdma_intr_en_1_r(i), 0xFFFFFFFF);
+                gk20a_writel(g, pbdma_intr_en_1_r(i),
+                        ~pbdma_intr_en_0_lbreq_enabled_f());
         }
 
         /* TBD: apply overrides */