[PATCH 02/18] ARM: replace setup_irq() by request_irq()

afzal mohammed
2020-02-12T08:02:50Z

request_irq() is preferred over setup_irq(). Existing callers of
setup_irq() reached mostly via 'init_IRQ()' & '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wherever that has been found, it too has been replaced by free_irq().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@gmail.com>
---

Since cc'ing cover letter to all maintainers/reviewers would be too
many, refer for cover letter,
https://lkml.kernel.org/r/cover.1581478323.git.afzal.mohd.ma@gmail.com

arch/arm/mach-cns3xxx/core.c | 10 +++-------
arch/arm/mach-ebsa110/core.c | 10 +++-------
arch/arm/mach-ep93xx/timer-ep93xx.c | 12 ++++--------
arch/arm/mach-footbridge/dc21285-timer.c | 11 +++--------
arch/arm/mach-footbridge/isa-irq.c | 8 ++------
arch/arm/mach-footbridge/isa-timer.c | 11 +++--------
arch/arm/mach-iop32x/time.c | 12 ++++--------
arch/arm/mach-mmp/time.c | 11 +++--------
arch/arm/mach-omap1/pm.c | 22 +++++++++++++---------
arch/arm/mach-omap1/time.c | 10 +++-------
arch/arm/mach-omap1/timer32k.c | 10 +++-------
arch/arm/mach-omap2/timer.c | 11 +++--------
arch/arm/mach-rpc/time.c | 8 ++------
arch/arm/mach-spear/time.c | 9 ++-------
arch/arm/plat-orion/time.c | 10 +++-------
15 files changed, 54 insertions(+), 111 deletions(-)

diff --git a/arch/arm/mach-cns3xxx/core.c b/arch/arm/mach-cns3xxx/core.c
index 1d61a7701c11..2e8d0062ea72 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("request_irq() on %s failed\n", "timer");

cns3xxx_clockevents_init(timer_irq);
}
diff --git a/arch/arm/mach-ebsa110/core.c b/arch/arm/mach-ebsa110/core.c
index da2ff4f61d6b..cf79aa7637fc 100644
--- a/arch/arm/mach-ebsa110/core.c
+++ b/arch/arm/mach-ebsa110/core.c
@@ -201,12 +201,6 @@ ebsa110_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction ebsa110_timer_irq = {
- .name = "EBSA110 Timer Tick",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = ebsa110_timer_interrupt,
-};
-
/*
* Set up timer interrupt.
*/
@@ -221,7 +215,9 @@ void __init ebsa110_timer_init(void)
__raw_writeb(COUNT & 0xff, PIT_T1);
__raw_writeb(COUNT >> 8, PIT_T1);

- setup_irq(IRQ_EBSA110_TIMER0, &ebsa110_timer_irq);
+ if (request_irq(IRQ_EBSA110_TIMER0, ebsa110_timer_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "EBSA110 Timer Tick", NULL))
+ pr_err("request_irq() on %s failed\n", "EBSA110 Timer Tick");
}

static struct plat_serial8250_port serial_platform_data[] = {
diff --git a/arch/arm/mach-ep93xx/timer-ep93xx.c b/arch/arm/mach-ep93xx/timer-ep93xx.c
index de998830f534..0335f3b93340 100644
--- a/arch/arm/mach-ep93xx/timer-ep93xx.c
+++ b/arch/arm/mach-ep93xx/timer-ep93xx.c
@@ -117,13 +117,6 @@ static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction ep93xx_timer_irq = {
- .name = "ep93xx timer",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = ep93xx_timer_interrupt,
- .dev_id = &ep93xx_clockevent,
-};
-
void __init ep93xx_timer_init(void)
{
/* Enable and register clocksource and sched_clock on timer 4 */
@@ -136,7 +129,10 @@ void __init ep93xx_timer_init(void)
EP93XX_TIMER4_RATE);

/* Set up clockevent on timer 3 */
- setup_irq(IRQ_EP93XX_TIMER3, &ep93xx_timer_irq);
+ if (request_irq(IRQ_EP93XX_TIMER3, ep93xx_timer_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "ep93xx timer",
+ &ep93xx_clockevent))
+ pr_err("request_irq() on %s failed\n", "ep93xx timer");
clockevents_config_and_register(&ep93xx_clockevent,
EP93XX_TIMER123_RATE,
1,
diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c
index f76212d2dbf1..151b8a76896f 100644
--- a/arch/arm/mach-footbridge/dc21285-timer.c
+++ b/arch/arm/mach-footbridge/dc21285-timer.c
@@ -101,13 +101,6 @@ static irqreturn_t timer1_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction footbridge_timer_irq = {
- .name = "dc21285_timer1",
- .handler = timer1_interrupt,
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .dev_id = &ckevt_dc21285,
-};
-
/*
* Set up timer interrupt.
*/
@@ -118,7 +111,9 @@ void __init footbridge_timer_init(void)

clocksource_register_hz(&cksrc_dc21285, rate);

- setup_irq(ce->irq, &footbridge_timer_irq);
+ if (request_irq(ce->irq, timer1_interrupt, IRQF_TIMER | IRQF_IRQPOLL,
+ "dc21285_timer1", &ckevt_dc21285))
+ pr_err("request_irq() on %s failed\n", "dc21285_timer1");

ce->cpumask = cpumask_of(smp_processor_id());
clockevents_config_and_register(ce, rate, 0x4, 0xffffff);
diff --git a/arch/arm/mach-footbridge/isa-irq.c b/arch/arm/mach-footbridge/isa-irq.c
index 88a553932c33..85f1c3cad83e 100644
--- a/arch/arm/mach-footbridge/isa-irq.c
+++ b/arch/arm/mach-footbridge/isa-irq.c
@@ -96,11 +96,6 @@ static void isa_irq_handler(struct irq_desc *desc)
generic_handle_irq(isa_irq);
}

-static struct irqaction irq_cascade = {
- .handler = no_action,
- .name = "cascade",
-};
-
static struct resource pic1_resource = {
.name = "pic1",
.start = 0x20,
@@ -160,7 +155,8 @@ void __init isa_init_irq(unsigned int host_irq)

request_resource(&ioport_resource, &pic1_resource);
request_resource(&ioport_resource, &pic2_resource);
- setup_irq(IRQ_ISA_CASCADE, &irq_cascade);
+ if (request_irq(IRQ_ISA_CASCADE, no_action, 0, "cascade", NULL))
+ pr_err("request_irq() on %s failed\n", "cascade");

irq_set_chained_handler(host_irq, isa_irq_handler);

diff --git a/arch/arm/mach-footbridge/isa-timer.c b/arch/arm/mach-footbridge/isa-timer.c
index 82f45591fb2c..3c1aed290fde 100644
--- a/arch/arm/mach-footbridge/isa-timer.c
+++ b/arch/arm/mach-footbridge/isa-timer.c
@@ -25,17 +25,12 @@ static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction pit_timer_irq = {
- .name = "pit",
- .handler = pit_timer_interrupt,
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .dev_id = &i8253_clockevent,
-};
-
void __init isa_timer_init(void)
{
clocksource_i8253_init();

- setup_irq(i8253_clockevent.irq, &pit_timer_irq);
+ if (request_irq(i8253_clockevent.irq, pit_timer_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "pit", &i8253_clockevent))
+ pr_err("request_irq() on %s failed\n", "pit");
clockevent_i8253_init(false);
}
diff --git a/arch/arm/mach-iop32x/time.c b/arch/arm/mach-iop32x/time.c
index 18a4df5c1baa..241637fcffff 100644
--- a/arch/arm/mach-iop32x/time.c
+++ b/arch/arm/mach-iop32x/time.c
@@ -137,13 +137,6 @@ iop_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction iop_timer_irq = {
- .name = "IOP Timer Tick",
- .handler = iop_timer_interrupt,
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .dev_id = &iop_clockevent,
-};
-
static unsigned long iop_tick_rate;
unsigned long get_iop_tick_rate(void)
{
@@ -168,7 +161,10 @@ void __init iop_init_time(unsigned long tick_rate)
*/
write_tmr0(timer_ctl & ~IOP_TMR_EN);
write_tisr(1);
- setup_irq(IRQ_IOP32X_TIMER0, &iop_timer_irq);
+ if (request_irq(IRQ_IOP32X_TIMER0, iop_timer_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "IOP Timer Tick",
+ &iop_clockevent))
+ pr_err("request_irq() on %s failed\n", "IOP Timer Tick");
iop_clockevent.cpumask = cpumask_of(0);
clockevents_config_and_register(&iop_clockevent, tick_rate,
0xf, 0xfffffffe);
diff --git a/arch/arm/mach-mmp/time.c b/arch/arm/mach-mmp/time.c
index c65cfc1ad99b..a5f157b4b981 100644
--- a/arch/arm/mach-mmp/time.c
+++ b/arch/arm/mach-mmp/time.c
@@ -175,13 +175,6 @@ static void __init timer_config(void)
__raw_writel(0x2, mmp_timer_base + TMR_CER);
}

-static struct irqaction timer_irq = {
- .name = "timer",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = timer_interrupt,
- .dev_id = &ckevt,
-};
-
void __init mmp_timer_init(int irq, unsigned long rate)
{
timer_config();
@@ -190,7 +183,9 @@ void __init mmp_timer_init(int irq, unsigned long rate)

ckevt.cpumask = cpumask_of(0);

- setup_irq(irq, &timer_irq);
+ if (request_irq(irq, timer_interrupt, IRQF_TIMER | IRQF_IRQPOLL,
+ "timer", &ckevt))
+ pr_err("request_irq() on %s failed\n", "timer");

clocksource_register_hz(&cksrc, rate);
clockevents_config_and_register(&ckevt, rate, MIN_DELTA, MAX_DELTA);
diff --git a/arch/arm/mach-omap1/pm.c b/arch/arm/mach-omap1/pm.c
index d068958d6f8a..ae03fae5b75d 100644
--- a/arch/arm/mach-omap1/pm.c
+++ b/arch/arm/mach-omap1/pm.c
@@ -596,11 +596,6 @@ static irqreturn_t omap_wakeup_interrupt(int irq, void *dev)
return IRQ_HANDLED;
}

-static struct irqaction omap_wakeup_irq = {
- .name = "peripheral wakeup",
- .handler = omap_wakeup_interrupt
-};
-

static const struct platform_suspend_ops omap_pm_ops = {
@@ -655,10 +650,19 @@ static int __init omap_pm_init(void)

arm_pm_idle = omap1_pm_idle;

- if (cpu_is_omap7xx())
- setup_irq(INT_7XX_WAKE_UP_REQ, &omap_wakeup_irq);
- else if (cpu_is_omap16xx())
- setup_irq(INT_1610_WAKE_UP_REQ, &omap_wakeup_irq);
+ if (cpu_is_omap7xx()) {
+ if (request_irq(INT_7XX_WAKE_UP_REQ, omap_wakeup_interrupt, 0,
+ "peripheral wakeup", NULL)) {
+ pr_err("request_irq() on %s failed\n",
+ "peripheral wakeup");
+ }
+ } else if (cpu_is_omap16xx()) {
+ if (request_irq(INT_1610_WAKE_UP_REQ, omap_wakeup_interrupt, 0,
+ "peripheral wakeup", NULL)) {
+ pr_err("request_irq() on %s failed\n",
+ "peripheral wakeup");
+ }
+ }

/* Program new power ramp-up time
* (0 for most boards since we don't lower voltage when in deep sleep)
diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c
index 524977a31a49..da5685013e2c 100644
--- a/arch/arm/mach-omap1/time.c
+++ b/arch/arm/mach-omap1/time.c
@@ -155,15 +155,11 @@ static irqreturn_t omap_mpu_timer1_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction omap_mpu_timer1_irq = {
- .name = "mpu_timer1",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = omap_mpu_timer1_interrupt,
-};
-
static __init void omap_init_mpu_timer(unsigned long rate)
{
- setup_irq(INT_TIMER1, &omap_mpu_timer1_irq);
+ if (request_irq(INT_TIMER1, omap_mpu_timer1_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "mpu_timer1", NULL))
+ pr_err("request_irq() on %s failed\n", "mpu_timer1");
omap_mpu_timer_start(0, (rate / HZ) - 1, 1);

clockevent_mpu_timer1.cpumask = cpumask_of(0);
diff --git a/arch/arm/mach-omap1/timer32k.c b/arch/arm/mach-omap1/timer32k.c
index 0ae6c52a7d70..e6bf8b48b7bb 100644
--- a/arch/arm/mach-omap1/timer32k.c
+++ b/arch/arm/mach-omap1/timer32k.c
@@ -148,15 +148,11 @@ static irqreturn_t omap_32k_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction omap_32k_timer_irq = {
- .name = "32KHz timer",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = omap_32k_timer_interrupt,
-};
-
static __init void omap_init_32k_timer(void)
{
- setup_irq(INT_OS_TIMER, &omap_32k_timer_irq);
+ if (request_irq(INT_OS_TIMER, omap_32k_timer_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "32KHz timer", NULL))
+ pr_err("request_irq() on %s failed\n", "32KHz timer");

clockevent_32k_timer.cpumask = cpumask_of(0);
clockevents_config_and_register(&clockevent_32k_timer,
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 0d0a731cb476..e60f1fdc4a60 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -91,12 +91,6 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction omap2_gp_timer_irq = {
- .name = "gp_timer",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = omap2_gp_timer_interrupt,
-};
-
static int omap2_gp_timer_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
{
@@ -382,8 +376,9 @@ static void __init omap2_gp_clockevent_init(int gptimer_id,
&clockevent_gpt.name, OMAP_TIMER_POSTED);
BUG_ON(res);

- omap2_gp_timer_irq.dev_id = &clkev;
- setup_irq(clkev.irq, &omap2_gp_timer_irq);
+ if (request_irq(clkev.irq, omap2_gp_timer_interrupt,
+ IRQF_TIMER | IRQF_IRQPOLL, "gp_timer", &clkev))
+ pr_err("request_irq() on %s failed\n", "gp_timer");

__omap_dm_timer_int_enable(&clkev, OMAP_TIMER_INT_OVERFLOW);

diff --git a/arch/arm/mach-rpc/time.c b/arch/arm/mach-rpc/time.c
index 1d750152b160..14460c84aca4 100644
--- a/arch/arm/mach-rpc/time.c
+++ b/arch/arm/mach-rpc/time.c
@@ -85,11 +85,6 @@ ioc_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction ioc_timer_irq = {
- .name = "timer",
- .handler = ioc_timer_interrupt
-};
-
/*
* Set up timer interrupt.
*/
@@ -97,5 +92,6 @@ void __init ioc_timer_init(void)
{
WARN_ON(clocksource_register_hz(&ioctime_clocksource, RPC_CLOCK_FREQ));
ioctime_init();
- setup_irq(IRQ_TIMER0, &ioc_timer_irq);
+ if (request_irq(IRQ_TIMER0, ioc_timer_interrupt, 0, "timer", NULL))
+ pr_err("request_irq() on %s failed\n", "timer");
}
diff --git a/arch/arm/mach-spear/time.c b/arch/arm/mach-spear/time.c
index 289e036c9c30..92b2850eeb4f 100644
--- a/arch/arm/mach-spear/time.c
+++ b/arch/arm/mach-spear/time.c
@@ -181,12 +181,6 @@ static irqreturn_t spear_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction spear_timer_irq = {
- .name = "timer",
- .flags = IRQF_TIMER,
- .handler = spear_timer_interrupt
-};
-
static void __init spear_clockevent_init(int irq)
{
u32 tick_rate;
@@ -201,7 +195,8 @@ static void __init spear_clockevent_init(int irq)

clockevents_config_and_register(&clkevt, tick_rate, 3, 0xfff0);

- setup_irq(irq, &spear_timer_irq);
+ if (request_irq(irq, spear_timer_interrupt, IRQF_TIMER, "timer", NULL))
+ pr_err("request_irq() on %s failed\n", "timer");
}

static const struct of_device_id timer_of_match[] __initconst = {
diff --git a/arch/arm/plat-orion/time.c b/arch/arm/plat-orion/time.c
index ffb93db68e9c..877ded7c8b28 100644
--- a/arch/arm/plat-orion/time.c
+++ b/arch/arm/plat-orion/time.c
@@ -177,12 +177,6 @@ static irqreturn_t orion_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static struct irqaction orion_timer_irq = {
- .name = "orion_tick",
- .flags = IRQF_TIMER,
- .handler = orion_timer_interrupt
-};
-
void __init
orion_time_set_base(void __iomem *_timer_base)
{
@@ -236,7 +230,9 @@ orion_time_init(void __iomem *_bridge_base, u32 _bridge_timer1_clr_mask,
/*
* Setup clockevent timer (interrupt-driven).
*/
- setup_irq(irq, &orion_timer_irq);
+ if (request_irq(irq, orion_timer_interrupt, IRQF_TIMER, "orion_tick",
+ NULL))
+ pr_err("request_irq() on %s failed\n", "orion_tick");
orion_clkevt.cpumask = cpumask_of(0);
clockevents_config_and_register(&orion_clkevt, tclk, 1, 0xfffffffe);
}
--
2.24.1