gpu: nvgpu: gp10b: Fix pagepool max size

If pagepool size equals max we should use zero. Add the comparison
to do that.

Bug 1686189

Change-Id: I15bd43663550b1089a726c0256b89f849c193e21
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/801526
(cherry picked from commit 9d89ea5ba345b19d2cff86130ba9d3c4c5f07e6e)
Reviewed-on: http://git-master/r/815681
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
index d61ac5bb..c5f45816 100644
--- a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
@@ -684,6 +684,10 @@ static void gr_gp10b_update_ctxsw_preemption_mode(struct gk20a *g,
                         (u64_hi32(gr_ctx->t18x.pagepool_ctxsw_buffer.gpu_va) <<
                          (32 - gr_scc_pagepool_base_addr_39_8_align_bits_v()));
                 size = gr_ctx->t18x.pagepool_ctxsw_buffer.size;
+
+                if (size == g->ops.gr.pagepool_default_size(g))
+                        size = gr_scc_pagepool_total_pages_hwmax_v();
+
                 g->ops.gr.commit_global_pagepool(g, ch_ctx, addr, size, true);
 
                 addr = (u64_lo32(gr_ctx->t18x.spill_ctxsw_buffer.gpu_va) >>