linux-kernel - [tip: irq/core] irqchip: Replace setup_irq() by request

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Date:   Sun, 29 Mar 2020 20:26:22 -0000
From:   "tip-bot2 for afzal mohammed" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     afzal mohammed <afzal.mohd.ma@...il.com>,
        Marc Zyngier <maz@...nel.org>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: irq/core] irqchip: Replace setup_irq() by request_irq()

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     2ef1cb763d92f3e212005fcf5dcc713eaf42b257
Gitweb:        https://git.kernel.org/tip/2ef1cb763d92f3e212005fcf5dcc713eaf42b257
Author:        afzal mohammed <afzal.mohd.ma@...il.com>
AuthorDate:    Wed, 04 Mar 2020 06:18:38 +05:30
Committer:     Marc Zyngier <maz@...nel.org>
CommitterDate: Sun, 08 Mar 2020 14:25:46 

irqchip: Replace setup_irq() by request_irq()

request_irq() is preferred over setup_irq(). Invocations of setup_irq()
occur after memory allocators are ready.

Per tglx[1], setup_irq() existed in olden days when allocators were not
ready by the time early interrupts were initialized.

Hence replace setup_irq() by request_irq().

[1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos

Signed-off-by: afzal mohammed <afzal.mohd.ma@...il.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20200304004839.4729-1-afzal.mohd.ma@gmail.com
---
 drivers/irqchip/irq-i8259.c   | 16 ++++++----------
 drivers/irqchip/irq-ingenic.c |  9 +++------
 2 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c
index d000870..b6f6aa7 100644
--- a/drivers/irqchip/irq-i8259.c
+++ b/drivers/irqchip/irq-i8259.c
@@ -268,15 +268,6 @@ static void init_8259A(int auto_eoi)
 	raw_spin_unlock_irqrestore(&i8259A_lock, flags);
 }
 
-/*
- * IRQ2 is cascade interrupt to second interrupt controller
- */
-static struct irqaction irq2 = {
-	.handler = no_action,
-	.name = "cascade",
-	.flags = IRQF_NO_THREAD,
-};
-
 static struct resource pic1_io_resource = {
 	.name = "pic1",
 	.start = PIC_MASTER_CMD,
@@ -311,6 +302,10 @@ static const struct irq_domain_ops i8259A_ops = {
  */
 struct irq_domain * __init __init_i8259_irqs(struct device_node *node)
 {
+	/*
+	 * PIC_CASCADE_IR is cascade interrupt to second interrupt controller
+	 */
+	int irq = I8259A_IRQ_BASE + PIC_CASCADE_IR;
 	struct irq_domain *domain;
 
 	insert_resource(&ioport_resource, &pic1_io_resource);
@@ -323,7 +318,8 @@ struct irq_domain * __init __init_i8259_irqs(struct device_node *node)
 	if (!domain)
 		panic("Failed to add i8259 IRQ domain");
 
-	setup_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, &irq2);
+	if (request_irq(irq, no_action, IRQF_NO_THREAD, "cascade", NULL))
+		pr_err("Failed to register cascade interrupt\n");
 	register_syscore_ops(&i8259_syscore_ops);
 	return domain;
 }
diff --git a/drivers/irqchip/irq-ingenic.c b/drivers/irqchip/irq-ingenic.c
index c5589ee..9f3da42 100644
--- a/drivers/irqchip/irq-ingenic.c
+++ b/drivers/irqchip/irq-ingenic.c
@@ -58,11 +58,6 @@ static irqreturn_t intc_cascade(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static struct irqaction intc_cascade_action = {
-	.handler = intc_cascade,
-	.name = "SoC intc cascade interrupt",
-};
-
 static int __init ingenic_intc_of_init(struct device_node *node,
 				       unsigned num_chips)
 {
@@ -130,7 +125,9 @@ static int __init ingenic_intc_of_init(struct device_node *node,
 		irq_reg_writel(gc, IRQ_MSK(32), JZ_REG_INTC_SET_MASK);
 	}
 
-	setup_irq(parent_irq, &intc_cascade_action);
+	if (request_irq(parent_irq, intc_cascade, 0,
+			"SoC intc cascade interrupt", NULL))
+		pr_err("Failed to register SoC intc cascade interrupt\n");
 	return 0;
 
 out_domain_remove: