Patch "clk: zynqmp: Add a check for NULL pointer" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    clk: zynqmp: Add a check for NULL pointer

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     clk-zynqmp-add-a-check-for-null-pointer.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 47c264c3f4093ce6009093e20050ef315da4e2fb
Author: Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxxxxx>
Date:   Wed May 18 11:23:14 2022 +0530

    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@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20220518055314.2486-1-shubhrajyoti.datta@xxxxxxxxxx
    Acked-by: Michal Simek <michal.simek@xxxxxxx>
    Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
    Stable-dep-of: 1fe15be1fb61 ("drivers: clk: zynqmp: update divider round rate logic")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c
index 9e535d3e1c0c..47a199346ddf 100644
--- a/drivers/clk/zynqmp/divider.c
+++ b/drivers/clk/zynqmp/divider.c
@@ -120,10 +120,13 @@ 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;