linux-kernel - [PATCH v2 07/18] microblaze: Replace setup_irq() by request

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Message-ID: <2059d2aae0cf9dc2216540c8b0a3042f532dcaf4.1582471508.git.afzal.mohd.ma@gmail.com>
Date:   Mon, 24 Feb 2020 06:20:35 +0530
From:   afzal mohammed <afzal.mohd.ma@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Michal Simek <monstr@...str.eu>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 07/18] microblaze: Replace setup_irq() by request_irq()

request_irq() is preferred over setup_irq(). The early boot setup_irq()
invocations happen either via 'init_IRQ()' or 'time_init()', while
memory allocators are ready by 'mm_init()'.

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().

Seldom remove_irq() usage has been observed coupled with setup_irq(),
wherever that has been found, it too has been replaced by free_irq().

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

Signed-off-by: afzal mohammed <afzal.mohd.ma@...il.com>
---

v2:
 * Replace pr_err("request_irq() on %s failed" by
           pr_err("%s: request_irq() failed"
 * Commit message massage

 arch/microblaze/kernel/timer.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index a6683484b3a1..f8832cf49384 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -161,13 +161,6 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static struct irqaction timer_irqaction = {
-	.handler = timer_interrupt,
-	.flags = IRQF_TIMER,
-	.name = "timer",
-	.dev_id = &clockevent_xilinx_timer,
-};
-
 static __init int xilinx_clockevent_init(void)
 {
 	clockevent_xilinx_timer.mult =
@@ -309,7 +302,8 @@ static int __init xilinx_timer_init(struct device_node *timer)
 
 	freq_div_hz = timer_clock_freq / HZ;
 
-	ret = setup_irq(irq, &timer_irqaction);
+	ret = request_irq(irq, timer_interrupt, IRQF_TIMER, "timer",
+			  &clockevent_xilinx_timer);
 	if (ret) {
 		pr_err("Failed to setup IRQ");
 		return ret;
-- 
2.25.1