gpu: nvgpu: allocate syncpoint read map only once

Allocate syncpt_mem only if is not allocated.

JIRA GPUT19X-2

Change-Id: I081d27bb784fbe653890b5f8d36a4295c7ccc19b
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1580731
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index a4becda0..e1bf2b4b 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -325,9 +325,11 @@ int gk20a_finalize_poweron(struct gk20a *g)
 
 #if defined(CONFIG_TEGRA_GK20A_NVHOST) && defined(CONFIG_TEGRA_19x_GPU)
         if (gk20a_platform_has_syncpoints(g) && g->syncpt_unit_size) {
-                nr_pages = DIV_ROUND_UP(g->syncpt_unit_size, PAGE_SIZE);
-                __nvgpu_mem_create_from_phys(g, &g->syncpt_mem,
-                                g->syncpt_unit_base, nr_pages);
+                if (!nvgpu_mem_is_valid(&g->syncpt_mem)) {
+                        nr_pages = DIV_ROUND_UP(g->syncpt_unit_size, PAGE_SIZE);
+                        __nvgpu_mem_create_from_phys(g, &g->syncpt_mem,
+                                        g->syncpt_unit_base, nr_pages);
+                }
         }
 #endif