lantiq: drop kernel 4.4 support

Signed-off-by: Mathias Kresin <dev@kresin.me>

1 files changed, 0 insertions, 87 deletions

diff --git a/target/linux/lantiq/patches-4.4/0050-MIPS-Lantiq-Fix-cascaded-IRQ-setup.patch b/target/linux/lantiq/patches-4.4/0050-MIPS-Lantiq-Fix-cascaded-IRQ-setup.patch
deleted file mode 100644
index c0d7afc541..0000000000
--- a/target/linux/lantiq/patches-4.4/0050-MIPS-Lantiq-Fix-cascaded-IRQ-setup.patch
+++ /dev/null
@@ -1,87 +0,0 @@
-From: Felix Fietkau <nbd@nbd.name>
-Date: Thu, 19 Jan 2017 12:14:44 +0100
-Subject: [PATCH] MIPS: Lantiq: Fix cascaded IRQ setup
-
-With the IRQ stack changes integrated, the XRX200 devices started
-emitting a constant stream of kernel messages like this:
-
-[  565.415310] Spurious IRQ: CAUSE=0x1100c300
-
-This appears to be caused by IP0 firing for some reason without being
-handled. Fix this by setting up IP2-6 as a proper chained IRQ handler and
-calling do_IRQ for all MIPS CPU interrupts.
-
-Cc: john@phrozen.org
-Cc: stable@vger.kernel.org
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/arch/mips/lantiq/irq.c
-+++ b/arch/mips/lantiq/irq.c
-@@ -271,6 +271,11 @@ static void ltq_hw5_irqdispatch(void)
- DEFINE_HWx_IRQDISPATCH(5)
- #endif
- 
-+static void ltq_hw_irq_handler(struct irq_desc *desc)
-+{
-+	ltq_hw_irqdispatch(irq_desc_get_irq(desc) - 2);
-+}
-+
- #ifdef CONFIG_MIPS_MT_SMP
- void __init arch_init_ipiirq(int irq, struct irqaction *action)
- {
-@@ -315,23 +320,19 @@ static struct irqaction irq_call = {
- asmlinkage void plat_irq_dispatch(void)
- {
- 	unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
--	unsigned int i;
-+	int irq;
- 
--	if ((MIPS_CPU_TIMER_IRQ == 7) && (pending & CAUSEF_IP7)) {
--		do_IRQ(MIPS_CPU_TIMER_IRQ);
--		goto out;
--	} else {
--		for (i = 0; i < MAX_IM; i++) {
--			if (pending & (CAUSEF_IP2 << i)) {
--				ltq_hw_irqdispatch(i);
--				goto out;
--			}
--		}
-+	if (!pending) {
-+		spurious_interrupt();
-+		return;
- 	}
--	pr_alert("Spurious IRQ: CAUSE=0x%08x\n", read_c0_status());
- 
--out:
--	return;
-+	pending >>= CAUSEB_IP;
-+	while (pending) {
-+		irq = fls(pending) - 1;
-+		do_IRQ(MIPS_CPU_IRQ_BASE + irq);
-+		pending &= ~BIT(irq);
-+	}
- }
- 
- static int icu_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
-@@ -356,11 +357,6 @@ static const struct irq_domain_ops irq_d
- 	.map = icu_map,
- };
- 
--static struct irqaction cascade = {
--	.handler = no_action,
--	.name = "cascade",
--};
--
- int __init icu_of_init(struct device_node *node, struct device_node *parent)
- {
- 	struct device_node *eiu_node;
-@@ -392,7 +388,7 @@ int __init icu_of_init(struct device_nod
- 	mips_cpu_irq_init();
- 
- 	for (i = 0; i < MAX_IM; i++)
--		setup_irq(i + 2, &cascade);
-+		irq_set_chained_handler(i + 2, ltq_hw_irq_handler);
- 
- 	if (cpu_has_vint) {
- 		pr_info("Setting up vectored interrupts\n");