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Subject[PATCH v3 09/25] irqdomain: remove NO_IRQ from irq domain code
Date
zero always means no irq when using irq domains.  Get rid of the NO_IRQ
references.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
---
kernel/irq/irqdomain.c | 38 +++++++++++++++++++-------------------
1 files changed, 19 insertions(+), 19 deletions(-)
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 684f32d..8ea2e48 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -103,7 +103,7 @@ struct irq_domain *irq_alloc_host(struct device_node *of_node,
case IRQ_DOMAIN_MAP_LINEAR:
rmap = (unsigned int *)(host + 1);
for (i = 0; i < revmap_arg; i++)
- rmap[i] = NO_IRQ;
+ rmap[i] = 0;
host->revmap_data.linear.size = revmap_arg;
host->revmap_data.linear.revmap = rmap;
break;
@@ -213,16 +213,16 @@ unsigned int irq_create_direct_mapping(struct irq_domain *host)
WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_NOMAP);

virq = irq_alloc_desc(0);
- if (virq == NO_IRQ) {
+ if (!virq) {
pr_debug("irq: create_direct virq allocation failed\n");
- return NO_IRQ;
+ return 0;
}

pr_debug("irq: create_direct obtained virq %d\n", virq);

if (irq_setup_virq(host, virq, virq)) {
irq_free_desc(virq);
- return NO_IRQ;
+ return 0;
}

return virq;
@@ -252,13 +252,13 @@ unsigned int irq_create_mapping(struct irq_domain *host,
printk(KERN_WARNING "irq_create_mapping called for"
" NULL host, hwirq=%lx\n", hwirq);
WARN_ON(1);
- return NO_IRQ;
+ return 0;
}
pr_debug("irq: -> using host @%p\n", host);

/* Check if mapping already exists */
virq = irq_find_mapping(host, hwirq);
- if (virq != NO_IRQ) {
+ if (virq) {
pr_debug("irq: -> existing mapping on virq %d\n", virq);
return virq;
}
@@ -268,7 +268,7 @@ unsigned int irq_create_mapping(struct irq_domain *host,
/* Handle legacy */
virq = (unsigned int)hwirq;
if (virq == 0 || virq >= NUM_ISA_INTERRUPTS)
- return NO_IRQ;
+ return 0;
return virq;
} else {
/* Allocate a virtual interrupt number */
@@ -276,16 +276,16 @@ unsigned int irq_create_mapping(struct irq_domain *host,
virq = irq_alloc_desc_from(hint, 0);
if (!virq)
virq = irq_alloc_desc(0);
- if (virq == NO_IRQ) {
+ if (!virq) {
pr_debug("irq: -> virq allocation failed\n");
- return NO_IRQ;
+ return 0;
}
}

if (irq_setup_virq(host, virq, hwirq)) {
if (host->revmap_type != IRQ_DOMAIN_MAP_LEGACY)
irq_free_desc(virq);
- return NO_IRQ;
+ return 0;
}

pr_debug("irq: irq %lu on host %s mapped to virtual irq %u\n",
@@ -310,7 +310,7 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
if (host == NULL) {
printk(KERN_WARNING "irq: no irq host found for %s !\n",
controller->full_name);
- return NO_IRQ;
+ return 0;
}

/* If host has no translation, then we assume interrupt line */
@@ -319,12 +319,12 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
else {
if (host->ops->xlate(host, controller, intspec, intsize,
&hwirq, &type))
- return NO_IRQ;
+ return 0;
}

/* Create mapping */
virq = irq_create_mapping(host, hwirq);
- if (virq == NO_IRQ)
+ if (!virq)
return virq;

/* Set type if specified and different than the current one */
@@ -345,7 +345,7 @@ void irq_dispose_mapping(unsigned int virq)
struct irq_domain *host;
irq_hw_number_t hwirq;

- if (virq == NO_IRQ || !irq_data)
+ if (!virq || !irq_data)
return;

host = irq_data->domain;
@@ -374,7 +374,7 @@ void irq_dispose_mapping(unsigned int virq)
switch(host->revmap_type) {
case IRQ_DOMAIN_MAP_LINEAR:
if (hwirq < host->revmap_data.linear.size)
- host->revmap_data.linear.revmap[hwirq] = NO_IRQ;
+ host->revmap_data.linear.revmap[hwirq] = 0;
break;
case IRQ_DOMAIN_MAP_TREE:
mutex_lock(&revmap_trees_mutex);
@@ -409,7 +409,7 @@ unsigned int irq_find_mapping(struct irq_domain *host,
if (host == NULL)
host = irq_default_host;
if (host == NULL)
- return NO_IRQ;
+ return 0;

/* legacy -> bail early */
if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
@@ -427,7 +427,7 @@ unsigned int irq_find_mapping(struct irq_domain *host,
if (i >= irq_virq_count)
i = NUM_ISA_INTERRUPTS;
} while(i != hint);
- return NO_IRQ;
+ return 0;
}
EXPORT_SYMBOL_GPL(irq_find_mapping);

@@ -480,7 +480,7 @@ void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
if (WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
return;

- if (virq != NO_IRQ) {
+ if (virq) {
mutex_lock(&revmap_trees_mutex);
radix_tree_insert(&host->revmap_data.tree, hwirq, irq_data);
mutex_unlock(&revmap_trees_mutex);
@@ -514,7 +514,7 @@ unsigned int irq_linear_revmap(struct irq_domain *host,
return irq_find_mapping(host, hwirq);

/* Fill up revmap with slow path if no mapping found */
- if (unlikely(revmap[hwirq] == NO_IRQ))
+ if (unlikely(!revmap[hwirq]))
revmap[hwirq] = irq_find_mapping(host, hwirq);

return revmap[hwirq];
--
1.7.5.4


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