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Subject[PATCH v3] ARM: cns3xxx: replace setup_irq() by request_irq()
Date
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@gmail.com>
---
Hi sub-arch maintainers,

If the patch is okay, please take it thr' your tree.

Regards
afzal

v3:
* Split out from series, also split out from ARM patch to subarch level
as Thomas suggested to take it thr' respective maintainers
* Modify string displayed in case of error as suggested by Thomas
* Re-arrange code as required to improve readability
* Remove irrelevant parts from commit message & improve

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

arch/arm/mach-cns3xxx/core.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/arch/arm/mach-cns3xxx/core.c b/arch/arm/mach-cns3xxx/core.c
index 1d61a7701c11..e4f4b20b83a2 100644
--- a/arch/arm/mach-cns3xxx/core.c
+++ b/arch/arm/mach-cns3xxx/core.c
@@ -189,12 +189,6 @@ static irqreturn_t cns3xxx_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction cns3xxx_timer_irq = {
- .name = "timer",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = cns3xxx_timer_interrupt,
-};
-
/*
* Set up the clock source and clock events devices
*/
@@ -245,7 +239,9 @@ static void __init __cns3xxx_timer_init(unsigned int timer_irq)
writel(val, cns3xxx_tmr1 + TIMER1_2_CONTROL_OFFSET);

/* Make irqs happen for the system timer */
- setup_irq(timer_irq, &cns3xxx_timer_irq);
+ if (request_irq(timer_irq, cns3xxx_timer_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "timer", NULL))
+ pr_err("Failed to request irq %d (timer)\n", timer_irq);

cns3xxx_clockevents_init(timer_irq);
}
--
2.25.1
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