openwrt/target/linux/bcm27xx/patches-5.15/950-0159-clk-bcm2835-Avoid-null-pointer-exception.patch

From e2a40771ad7e8268c1d9b8f8b5f7ca49ef3ecc2f Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Tue, 6 Aug 2019 15:23:14 +0100
Subject: [PATCH] clk-bcm2835: Avoid null pointer exception

clk_desc_array[BCM2835_PLLB] doesn't exist so we dereference null when iterating

Signed-off-by: popcornmix <popcornmix@gmail.com>
---
 drivers/clk/bcm/clk-bcm2835.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -2304,9 +2304,11 @@ static bool bcm2835_clk_is_claimed(const
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(clk_desc_array); i++) {
-		const char *clk_name = *(const char **)(clk_desc_array[i].data);
-		if (!strcmp(name, clk_name))
-		    return bcm2835_clk_claimed[i];
+		if (clk_desc_array[i].data) {
+			const char *clk_name = *(const char **)(clk_desc_array[i].data);
+			if (!strcmp(name, clk_name))
+				return bcm2835_clk_claimed[i];
+		}
 	}
 
 	return false;