1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/clk.c b/drivers/gpu/nvgpu/common/linux/clk.c
index 8bffc07b..a0e56455 100644
--- a/drivers/gpu/nvgpu/common/linux/clk.c
+++ b/drivers/gpu/nvgpu/common/linux/clk.c
@@ -84,15 +84,18 @@ static int nvgpu_linux_clk_set_rate(struct gk20a *g,
         return ret;
 }
 
-static unsigned long nvgpu_linux_get_fmax_at_vmin_safe(struct clk_gk20a *clk)
+static unsigned long nvgpu_linux_get_fmax_at_vmin_safe(struct gk20a *g)
 {
         /*
-         * On Tegra GPU clock exposed to frequency governor is a shared user on
-         * GPCPLL bus (gbus). The latter can be accessed as GPU clock parent.
-         * Respectively the grandparent is PLL reference clock.
+         * On Tegra platforms with GPCPLL bus (gbus) GPU tegra_clk clock exposed
+         * to frequency governor is a shared user on the gbus. The latter can be
+         * accessed as GPU clock parent, and incorporate DVFS related data.
          */
-        return tegra_dvfs_get_fmax_at_vmin_safe_t(
-                        clk_get_parent(clk->tegra_clk));
+        if (g->clk.tegra_clk)
+                return tegra_dvfs_get_fmax_at_vmin_safe_t(
+                        clk_get_parent(g->clk.tegra_clk));
+
+        return 0;
 }
 
 static u32 nvgpu_linux_get_ref_clock_rate(struct gk20a *g)