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clocksource: sh_mtu2: Use request_irq() instead of setup_irq() 

The driver claims it needs to register an interrupt handler too early
for request_irq(). This might have been true in the past, but the only
meaningful difference between request_irq() and setup_irq() today is an
additional kzalloc() call in request_irq(). As the driver calls
kmalloc() itself we know that the slab allocator is available, we can
thus switch to request_irq().

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Wolfram Sang <wsa@sang-engineering.com>
hifive-unleashed-5.1
Laurent Pinchart 2014-02-17 11:27:49 +01:00
parent 13931f8065
commit 276bee05d8
1 changed files with 8 additions and 14 deletions
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22
drivers/clocksource/sh_mtu2.c
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@ -37,7 +37,7 @@
struct sh_mtu2_priv {
void __iomem *mapbase;
struct clk *clk;
struct irqaction irqaction;
int irq;
struct platform_device *pdev;
unsigned long rate;
unsigned long periodic;
@ -244,10 +244,11 @@ static void sh_mtu2_register_clockevent(struct sh_mtu2_priv *p,
dev_info(&p->pdev->dev, "used for clock events\n");
clockevents_register_device(ced);
ret = setup_irq(p->irqaction.irq, &p->irqaction);
ret = request_irq(p->irq, sh_mtu2_interrupt,
IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,
dev_name(&p->pdev->dev), p);
if (ret) {
dev_err(&p->pdev->dev, "failed to request irq %d\n",
p->irqaction.irq);
dev_err(&p->pdev->dev, "failed to request irq %d\n", p->irq);
return;
}
}
@ -265,7 +266,7 @@ static int sh_mtu2_setup(struct sh_mtu2_priv *p, struct platform_device *pdev)
{
struct sh_timer_config *cfg = pdev->dev.platform_data;
struct resource *res;
int irq, ret;
int ret;
ret = -ENXIO;
memset(p, 0, sizeof(*p));
@ -284,8 +285,8 @@ static int sh_mtu2_setup(struct sh_mtu2_priv *p, struct platform_device *pdev)
goto err0;
}
irq = platform_get_irq(p->pdev, 0);
if (irq < 0) {
p->irq = platform_get_irq(p->pdev, 0);
if (p->irq < 0) {
dev_err(&p->pdev->dev, "failed to get irq\n");
goto err0;
}
@ -297,13 +298,6 @@ static int sh_mtu2_setup(struct sh_mtu2_priv *p, struct platform_device *pdev)
goto err0;
}
/* setup data for setup_irq() (too early for request_irq()) */
p->irqaction.name = dev_name(&p->pdev->dev);
p->irqaction.handler = sh_mtu2_interrupt;
p->irqaction.dev_id = p;
p->irqaction.irq = irq;
p->irqaction.flags = IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING;
/* get hold of clock */
p->clk = clk_get(&p->pdev->dev, "mtu2_fck");
if (IS_ERR(p->clk)) {