From af0b86199b6c50dc2f4274c7617aa724208506c6 Mon Sep 17 00:00:00 2001
From: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Date: Wed, 18 May 2022 11:23:14 +0530
Subject: [PATCH] clk: zynqmp: Add a check for NULL pointer
[ Upstream commit 6ab9810cfe6c8f3d8b8750c827d7870abd3751b9 ]
Add a NULL pointer check as clk_hw_get_parent can return NULL.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Link: https://lore.kernel.org/r/20220518055314.2486-1-shubhrajyoti.datta@xilinx.com
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Stable-dep-of: 1fe15be1fb61 ("drivers: clk: zynqmp: update divider round rate logic")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clk/zynqmp/divider.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c
index 57bf381f630d..acdd5e48e147 100644
--- a/drivers/clk/zynqmp/divider.c
+++ b/drivers/clk/zynqmp/divider.c
@@ -119,10 +119,13 @@ static void zynqmp_get_divider2_val(struct clk_hw *hw,
long error = LONG_MAX;
unsigned long div1_prate;
struct clk_hw *div1_parent_hw;
+ struct zynqmp_clk_divider *pdivider;
struct clk_hw *div2_parent_hw = clk_hw_get_parent(hw);
- struct zynqmp_clk_divider *pdivider =
- to_zynqmp_clk_divider(div2_parent_hw);
+ if (!div2_parent_hw)
+ return;
+
+ pdivider = to_zynqmp_clk_divider(div2_parent_hw);
if (!pdivider)
return;