gpu: nvgpu: check for valid scaling profile data

Check for valid scaling profile private data before making
calls to bandwidth manager.

Bug 200423741

Change-Id: Iff12b4a26ff0dfb2c32248b325a07e97f2de4e98
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1763601
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/platform_gp10b_tegra.c b/drivers/gpu/nvgpu/os/linux/platform_gp10b_tegra.c
index 00fd386e..cf18fd24 100644
--- a/drivers/gpu/nvgpu/os/linux/platform_gp10b_tegra.c
+++ b/drivers/gpu/nvgpu/os/linux/platform_gp10b_tegra.c
@@ -133,7 +133,7 @@ static void gp10b_tegra_scale_exit(struct device *dev)
         struct gk20a_platform *platform = gk20a_get_platform(dev);
         struct gk20a_scale_profile *profile = platform->g->scale_profile;
 
-        if (profile)
+        if (profile && profile->private_data)
                 tegra_bwmgr_unregister(
                         (struct tegra_bwmgr_client *)profile->private_data);
 }
@@ -300,7 +300,8 @@ void gp10b_tegra_postscale(struct device *pdev,
         unsigned long emc_rate;
 
         nvgpu_log_fn(g, " ");
-        if (profile && !platform->is_railgated(pdev)) {
+        if (profile && profile->private_data &&
+                        !platform->is_railgated(pdev)) {
                 unsigned long emc_scale;
 
                 if (freq <= gp10b_freq_table[0])