[PATCH 07/16] clk: qcom: clk-krait: add hw_parent check for div2_round_rate

Ansuel Smith
2022-03-13T19:05:18Z

Check if hw_parent is present before calculating the round_rate to
prevent kernel panic.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/clk/qcom/clk-krait.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/qcom/clk-krait.c b/drivers/clk/qcom/clk-krait.c
index e447fcc3806d..d8af281eba0e 100644
--- a/drivers/clk/qcom/clk-krait.c
+++ b/drivers/clk/qcom/clk-krait.c
@@ -80,7 +80,12 @@ EXPORT_SYMBOL_GPL(krait_mux_clk_ops);
static long krait_div2_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
- *parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw), rate * 2);
+ struct clk_hw *hw_parent = clk_hw_get_parent(hw);
+
+ if (!hw_parent)
+ return -1;
+
+ *parent_rate = clk_hw_round_rate(hw_parent, rate * 2);
return DIV_ROUND_UP(*parent_rate, 2);
}

--
2.34.1