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powerpc: mpic: Cleanup flow type handling 

The core irq_set_type() function updates the flow type when the chip
callback returns 0. So setting the type is bogus.

The new core code allows to update the type in irq_data and return
IRQ_SET_MASK_OK_NOCOPY, so the core code will not touch it, except for
setting the IRQ_LEVEL flag.

Retrieve the IRQ_LEVEL information from irq_data which avoids a
redundant sparse irq lookup as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-03-25 16:20:15 +01:00
parent 5fed97a9fd
commit 24a3f2e82b
1 changed files with 12 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
arch/powerpc/sysdev/mpic.c
View File

@ -361,7 +361,7 @@ static inline void mpic_ht_end_irq(struct mpic *mpic, unsigned int source)
}
static void mpic_startup_ht_interrupt(struct mpic *mpic, unsigned int source,
unsigned int irqflags)
bool level)
{
struct mpic_irq_fixup *fixup = &mpic->fixups[source];
unsigned long flags;
@ -370,14 +370,14 @@ static void mpic_startup_ht_interrupt(struct mpic *mpic, unsigned int source,
if (fixup->base == NULL)
return;
DBG("startup_ht_interrupt(0x%x, 0x%x) index: %d\n",
source, irqflags, fixup->index);
DBG("startup_ht_interrupt(0x%x) index: %d\n",
source, fixup->index);
raw_spin_lock_irqsave(&mpic->fixup_lock, flags);
/* Enable and configure */
writeb(0x10 + 2 * fixup->index, fixup->base + 2);
tmp = readl(fixup->base + 4);
tmp &= ~(0x23U);
if (irqflags & IRQ_LEVEL)
if (level)
tmp |= 0x22;
writel(tmp, fixup->base + 4);
raw_spin_unlock_irqrestore(&mpic->fixup_lock, flags);
@ -389,8 +389,7 @@ static void mpic_startup_ht_interrupt(struct mpic *mpic, unsigned int source,
#endif
}
static void mpic_shutdown_ht_interrupt(struct mpic *mpic, unsigned int source,
unsigned int irqflags)
static void mpic_shutdown_ht_interrupt(struct mpic *mpic, unsigned int source)
{
struct mpic_irq_fixup *fixup = &mpic->fixups[source];
unsigned long flags;
@ -399,7 +398,7 @@ static void mpic_shutdown_ht_interrupt(struct mpic *mpic, unsigned int source,
if (fixup->base == NULL)
return;
DBG("shutdown_ht_interrupt(0x%x, 0x%x)\n", source, irqflags);
DBG("shutdown_ht_interrupt(0x%x)\n", source);
/* Disable */
raw_spin_lock_irqsave(&mpic->fixup_lock, flags);
@ -738,7 +737,7 @@ static void mpic_unmask_ht_irq(struct irq_data *d)
mpic_unmask_irq(d);
if (irq_to_desc(d->irq)->status & IRQ_LEVEL)
if (irqd_is_level_type(d))
mpic_ht_end_irq(mpic, src);
}
@ -748,7 +747,7 @@ static unsigned int mpic_startup_ht_irq(struct irq_data *d)
unsigned int src = mpic_irq_to_hw(d->irq);
mpic_unmask_irq(d);
mpic_startup_ht_interrupt(mpic, src, irq_to_desc(d->irq)->status);
mpic_startup_ht_interrupt(mpic, src, irqd_is_level_type(d));
return 0;
}
@ -758,7 +757,7 @@ static void mpic_shutdown_ht_irq(struct irq_data *d)
struct mpic *mpic = mpic_from_irq_data(d);
unsigned int src = mpic_irq_to_hw(d->irq);
mpic_shutdown_ht_interrupt(mpic, src, irq_to_desc(d->irq)->status);
mpic_shutdown_ht_interrupt(mpic, src);
mpic_mask_irq(d);
}
@ -775,7 +774,7 @@ static void mpic_end_ht_irq(struct irq_data *d)
* latched another edge interrupt coming in anyway
*/
if (irq_to_desc(d->irq)->status & IRQ_LEVEL)
if (irqd_is_level_type(d))
mpic_ht_end_irq(mpic, src);
mpic_eoi(mpic);
}
@ -864,7 +863,6 @@ int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type)
{
struct mpic *mpic = mpic_from_irq_data(d);
unsigned int src = mpic_irq_to_hw(d->irq);
struct irq_desc *desc = irq_to_desc(d->irq);
unsigned int vecpri, vold, vnew;
DBG("mpic: set_irq_type(mpic:@%p,virq:%d,src:0x%x,type:0x%x)\n",
@ -879,10 +877,7 @@ int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type)
if (flow_type == IRQ_TYPE_NONE)
flow_type = IRQ_TYPE_LEVEL_LOW;
desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
desc->status |= IRQ_LEVEL;
irqd_set_trigger_type(d, flow_type);
if (mpic_is_ht_interrupt(mpic, src))
vecpri = MPIC_VECPRI_POLARITY_POSITIVE |
@ -897,7 +892,7 @@ int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type)
if (vold != vnew)
mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI), vnew);
return 0;
return IRQ_SET_MASK_OK_NOCOPY;;
}
void mpic_set_vector(unsigned int virq, unsigned int vector)