clk: tegra: Avoid calling an uninitialized function

Commit 493ffb0 ("clk: tegra: super: Switch to determine_rate") replaced clk_super_round_rate() by clk_super_determine_rate(), but didn't update one callsite that was explicitly calling the old tegra_clk_super_ops.round_rate() function, which was now NULL. This resulted in a crash on Tegra30 systems during early boot. Switch this callsite over to the clk_super_determine_rate() equivalent to avoid the crash. Fixes: 493ffb0 ("clk: tegra: super: Switch to determine_rate") Tested-by: Dmitry Osipenko <[email protected]> Signed-off-by: Thierry Reding <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Stephen Boyd <[email protected]>
chewitt · Jul 4, 2023 · f679e89 · f679e89
1 parent b211542
commit f679e89
Showing 1 changed file with 12 additions and 3 deletions.
diff --git a/drivers/clk/tegra/clk-tegra-super-cclk.c b/drivers/clk/tegra/clk-tegra-super-cclk.c
@@ -86,9 +86,18 @@ static int cclk_super_determine_rate(struct clk_hw *hw,
 	if (rate <= pllp_rate) {
 		if (super->flags & TEGRA20_SUPER_CLK)
 			rate = pllp_rate;
-		else
-			rate = tegra_clk_super_ops.round_rate(hw, rate,
-							      &pllp_rate);
+		else {
+			struct clk_rate_request parent = {
+				.rate = req->rate,
+				.best_parent_rate = pllp_rate,
+			};
+
+			clk_hw_get_rate_range(hw, &parent.min_rate,
+					      &parent.max_rate);
+			tegra_clk_super_ops.determine_rate(hw, &parent);
+			pllp_rate = parent.best_parent_rate;
+			rate = parent.rate;
+		}
 
 		req->best_parent_rate = pllp_rate;
 		req->best_parent_hw = pllp_hw;