clocksource: 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wherever that has been found, it too has been replaced by free_irq().
A build error that was reported by kbuild test robot <lkp@intel.com>
in the previous version of the patch also has been fixed.
[1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos
Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/91961c77c1cf93d41523f5e1ac52043f32f97077.1582799709.git.afzal.mohd.ma@gmail.com
diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c
index dae1b2b..f760229 100644
--- a/drivers/clocksource/samsung_pwm_timer.c
+++ b/drivers/clocksource/samsung_pwm_timer.c
@@ -256,13 +256,6 @@ static irqreturn_t samsung_clock_event_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static struct irqaction samsung_clock_event_irq = {
- .name = "samsung_time_irq",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = samsung_clock_event_isr,
- .dev_id = &time_event_device,
-};
-
static void __init samsung_clockevent_init(void)
{
unsigned long pclk;
@@ -282,7 +275,10 @@ static void __init samsung_clockevent_init(void)
clock_rate, 1, pwm.tcnt_max);
irq_number = pwm.irq[pwm.event_id];
- setup_irq(irq_number, &samsung_clock_event_irq);
+ if (request_irq(irq_number, samsung_clock_event_isr,
+ IRQF_TIMER | IRQF_IRQPOLL, "samsung_time_irq",
+ &time_event_device))
+ pr_err("%s: request_irq() failed\n", "samsung_time_irq");
if (pwm.variant.has_tint_cstat) {
u32 mask = (1 << pwm.event_id);