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Commit d69a78d7 authored by Tony Breeds's avatar Tony Breeds Committed by Benjamin Herrenschmidt
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powerpc/mpic: Cleanup mpic_find() implementation 



mpic_find() was overloaded to do two things, finding the mpic instance
for a given interrupt and returning if it's an IPI. Instead we introduce
mpic_is_ipi() and simplify mpic_find() to just return the mpic instance

Also silences the warning:
arch/powerpc/sysdev/mpic.c: In function 'mpic_irq_set_priority':
arch/powerpc/sysdev/mpic.c:1382: warning: 'is_ipi' may be used uninitialized in this function

Signed-off-by: default avatarTony Breeds <tony@bakeyournoodle.com>
Acked-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 805e324b

arch/powerpc/sysdev/mpic.c

+11 −12
Original line number Diff line number Diff line
@@ -613,23 +613,23 @@ static int irq_choose_cpu(unsigned int virt_irq) 
#define mpic_irq_to_hw(virq)	((unsigned int)irq_map[virq].hwirq)



/* Find an mpic associated with a given linux interrupt */

static struct mpic *mpic_find(unsigned int irq, unsigned int *is_ipi)

static struct mpic *mpic_find(unsigned int irq)

{

	unsigned int src = mpic_irq_to_hw(irq);

	struct mpic *mpic;



	if (irq < NUM_ISA_INTERRUPTS)

		return NULL;



	mpic = irq_desc[irq].chip_data;

	return irq_desc[irq].chip_data;

}



	if (is_ipi)

		*is_ipi = (src >= mpic->ipi_vecs[0] &&

			   src <= mpic->ipi_vecs[3]);

/* Determine if the linux irq is an IPI */

static unsigned int mpic_is_ipi(struct mpic *mpic, unsigned int irq)

{

	unsigned int src = mpic_irq_to_hw(irq);



	return mpic;

	return (src >= mpic->ipi_vecs[0] && src <= mpic->ipi_vecs[3]);

}





/* Convert a cpu mask from logical to physical cpu numbers. */

static inline u32 mpic_physmask(u32 cpumask)

{
@@ -1381,8 +1381,7 @@ void __init mpic_set_serial_int(struct mpic *mpic, int enable) 


void mpic_irq_set_priority(unsigned int irq, unsigned int pri)

{

	unsigned int is_ipi;

	struct mpic *mpic = mpic_find(irq, &is_ipi);

	struct mpic *mpic = mpic_find(irq);

	unsigned int src = mpic_irq_to_hw(irq);

	unsigned long flags;

	u32 reg;
@@ -1391,7 +1390,7 @@ void mpic_irq_set_priority(unsigned int irq, unsigned int pri) 
		return;



	spin_lock_irqsave(&mpic_lock, flags);

	if (is_ipi) {

	if (mpic_is_ipi(mpic, irq)) {

		reg = mpic_ipi_read(src - mpic->ipi_vecs[0]) &

			~MPIC_VECPRI_PRIORITY_MASK;

		mpic_ipi_write(src - mpic->ipi_vecs[0],