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authorYinghai Lu <yhlu.kernel@gmail.com>2008-08-19 20:50:14 -0700
committerIngo Molnar <mingo@elte.hu>2008-10-16 16:52:50 +0200
commit7d94f7ca401dd7f445fda9a971a48aa5427b3e55 (patch)
tree8f4d4b73966fd0aa54df2da5bbcf67ea0a7ff43a /kernel/irq/chip.c
parent46b8214d12c274bd4265aae482ab7ffe69d94818 (diff)
irq: remove >= nr_irqs checking with config_have_sparse_irq
remove irq limit checks - nr_irqs is dynamic and we expand anytime. v2: fix checking about result irq_cfg_without_new, so could use msi again v3: use irq_desc_without_new to check irq is valid Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq/chip.c')
-rw-r--r--kernel/irq/chip.c49
1 files changed, 27 insertions, 22 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 2aa3d4b2fce..a4bb0da9c88 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -27,13 +27,13 @@ void dynamic_irq_init(unsigned int irq)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = irq_to_desc(irq);
+ if (!desc) {
WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
return;
}
/* Ensure we don't have left over values from a previous use of this irq */
- desc = irq_to_desc(irq);
spin_lock_irqsave(&desc->lock, flags);
desc->status = IRQ_DISABLED;
desc->chip = &no_irq_chip;
@@ -60,12 +60,12 @@ void dynamic_irq_cleanup(unsigned int irq)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
return;
}
- desc = irq_to_desc(irq);
spin_lock_irqsave(&desc->lock, flags);
if (desc->action) {
spin_unlock_irqrestore(&desc->lock, flags);
@@ -92,7 +92,8 @@ int set_irq_chip(unsigned int irq, struct irq_chip *chip)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
return -EINVAL;
}
@@ -121,12 +122,12 @@ int set_irq_type(unsigned int irq, unsigned int type)
unsigned long flags;
int ret = -ENXIO;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
return -ENODEV;
}
- desc = irq_to_desc(irq);
if (type == IRQ_TYPE_NONE)
return 0;
@@ -149,13 +150,13 @@ int set_irq_data(unsigned int irq, void *data)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
printk(KERN_ERR
"Trying to install controller data for IRQ%d\n", irq);
return -EINVAL;
}
- desc = irq_to_desc(irq);
spin_lock_irqsave(&desc->lock, flags);
desc->handler_data = data;
spin_unlock_irqrestore(&desc->lock, flags);
@@ -175,12 +176,13 @@ int set_irq_msi(unsigned int irq, struct msi_desc *entry)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
printk(KERN_ERR
"Trying to install msi data for IRQ%d\n", irq);
return -EINVAL;
}
- desc = irq_to_desc(irq);
+
spin_lock_irqsave(&desc->lock, flags);
desc->msi_desc = entry;
if (entry)
@@ -201,8 +203,14 @@ int set_irq_chip_data(unsigned int irq, void *data)
struct irq_desc *desc;
unsigned long flags;
- desc = irq_to_desc(irq);
- if (irq >= nr_irqs || !desc->chip) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
+ printk(KERN_ERR
+ "Trying to install chip data for IRQ%d\n", irq);
+ return -EINVAL;
+ }
+
+ if (!desc->chip) {
printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq);
return -EINVAL;
}
@@ -546,14 +554,13 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
printk(KERN_ERR
"Trying to install type control for IRQ%d\n", irq);
return;
}
- desc = irq_to_desc(irq);
-
if (!handle)
handle = handle_bad_irq;
else if (desc->chip == &no_irq_chip) {
@@ -611,14 +618,13 @@ void __init set_irq_noprobe(unsigned int irq)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
return;
}
- desc = irq_to_desc(irq);
-
spin_lock_irqsave(&desc->lock, flags);
desc->status |= IRQ_NOPROBE;
spin_unlock_irqrestore(&desc->lock, flags);
@@ -629,14 +635,13 @@ void __init set_irq_probe(unsigned int irq)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= nr_irqs) {
+ desc = __irq_to_desc(irq);
+ if (!desc) {
printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
return;
}
- desc = irq_to_desc(irq);
-
spin_lock_irqsave(&desc->lock, flags);
desc->status &= ~IRQ_NOPROBE;
spin_unlock_irqrestore(&desc->lock, flags);