bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0159-clk-bcm2835-Avoid-null-pointer-exception.patch b/target/linux/bcm27xx/patches-5.15/950-0159-clk-bcm2835-Avoid-null-pointer-exception.patch
new file mode 100644
index 0000000000..092c7ecffc
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0159-clk-bcm2835-Avoid-null-pointer-exception.patch
@@ -0,0 +1,29 @@
+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;