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Commit 5a903090 authored by Felipe Balbi's avatar Felipe Balbi Committed by Samuel Ortiz
Browse files

mfd: Micro-optimization on twl4030 IRQ handler 



__ffs() will be far faster than the for loop used.

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent f01b1f90

drivers/mfd/twl4030-irq.c

+7 −7
Original line number Diff line number Diff line
@@ -293,7 +293,6 @@ static unsigned twl4030_irq_base; 
 */

static irqreturn_t handle_twl4030_pih(int irq, void *devid)

{

	int		module_irq;

	irqreturn_t	ret;

	u8		pih_isr;
@@ -304,12 +303,13 @@ static irqreturn_t handle_twl4030_pih(int irq, void *devid) 
		return IRQ_NONE;

	}



	/* these handlers deal with the relevant SIH irq status */

	for (module_irq = twl4030_irq_base;

			pih_isr;

			pih_isr >>= 1, module_irq++) {

		if (pih_isr & 0x1)

			handle_nested_irq(module_irq);

	while (pih_isr) {

		unsigned long	pending = __ffs(pih_isr);

		unsigned int	irq;



		pih_isr &= ~BIT(pending);

		irq = pending + twl4030_irq_base;

		handle_nested_irq(irq);

	}



	return IRQ_HANDLED;