1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/platform_gk20a_tegra.c b/drivers/gpu/nvgpu/os/linux/platform_gk20a_tegra.c
index 6a453096..0977e63a 100644
--- a/drivers/gpu/nvgpu/os/linux/platform_gk20a_tegra.c
+++ b/drivers/gpu/nvgpu/os/linux/platform_gk20a_tegra.c
@@ -649,7 +649,7 @@ int gk20a_tegra_init_secure_alloc(struct gk20a_platform *platform)
 static struct clk *gk20a_clk_get(struct gk20a *g)
 {
         if (!g->clk.tegra_clk) {
-                struct clk *clk;
+                struct clk *clk, *clk_parent;
                 char clk_dev_id[32];
                 struct device *dev = dev_from_gk20a(g);
 
@@ -661,7 +661,16 @@ static struct clk *gk20a_clk_get(struct gk20a *g)
                                   clk_dev_id);
                         return NULL;
                 }
+
+                clk_parent = clk_get_parent(clk);
+                if (IS_ERR_OR_NULL(clk_parent)) {
+                        nvgpu_err(g, "fail to get tegra gpu clk parent%s/gpu\n",
+                                  clk_dev_id);
+                        return NULL;
+                }
+
                 g->clk.tegra_clk = clk;
+                g->clk.tegra_clk_parent = clk_parent;
         }
 
         return g->clk.tegra_clk;