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irq: remove >= nr_irqs checking with config_have_sparse_irq

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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>
This commit is contained in:
Yinghai Lu
2008-08-19 20:50:14 -07:00
committed by Ingo Molnar
parent 46b8214d12
commit 7d94f7ca40
4 changed files with 55 additions and 48 deletions
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43
kernel/irq/manage.c
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@@ -31,10 +31,10 @@ cpumask_t irq_default_affinity = CPU_MASK_ALL;
*/
void synchronize_irq(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_desc *desc = __irq_to_desc(irq);
unsigned int status;
if (irq >= nr_irqs)
if (!desc)
return;
do {
@@ -142,10 +142,11 @@ int irq_select_affinity(unsigned int irq)
*/
void disable_irq_nosync(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_desc *desc;
unsigned long flags;
if (irq >= nr_irqs)
desc = __irq_to_desc(irq);
if (!desc)
return;
spin_lock_irqsave(&desc->lock, flags);
@@ -171,9 +172,10 @@ EXPORT_SYMBOL(disable_irq_nosync);
*/
void disable_irq(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_desc *desc;
if (irq >= nr_irqs)
desc = __irq_to_desc(irq);
if (!desc)
return;
disable_irq_nosync(irq);
@@ -213,10 +215,11 @@ static void __enable_irq(struct irq_desc *desc, unsigned int irq)
*/
void enable_irq(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_desc *desc;
unsigned long flags;
if (irq >= nr_irqs)
desc = __irq_to_desc(irq);
if (!desc)
return;
spin_lock_irqsave(&desc->lock, flags);
@@ -290,10 +293,14 @@ EXPORT_SYMBOL(set_irq_wake);
*/
int can_request_irq(unsigned int irq, unsigned long irqflags)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_desc *desc;
struct irqaction *action;
if (irq >= nr_irqs || desc->status & IRQ_NOREQUEST)
desc = __irq_to_desc(irq);
if (!desc)
return 0;
if (desc->status & IRQ_NOREQUEST)
return 0;
action = desc->action;
@@ -352,14 +359,15 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
*/
int setup_irq(unsigned int irq, struct irqaction *new)
{
struct irq_desc *desc = irq_to_desc(irq);
struct irq_desc *desc;
struct irqaction *old, **p;
const char *old_name = NULL;
unsigned long flags;
int shared = 0;
int ret;
if (irq >= nr_irqs)
desc = __irq_to_desc(irq);
if (!desc)
return -EINVAL;
if (desc->chip == &no_irq_chip)
@@ -518,10 +526,11 @@ void free_irq(unsigned int irq, void *dev_id)
unsigned long flags;
WARN_ON(in_interrupt());
if (irq >= nr_irqs)
desc = __irq_to_desc(irq);
if (!desc)
return;
desc = irq_to_desc(irq);
spin_lock_irqsave(&desc->lock, flags);
p = &desc->action;
for (;;) {
@@ -634,9 +643,11 @@ int request_irq(unsigned int irq, irq_handler_t handler,
*/
if ((irqflags & IRQF_SHARED) && !dev_id)
return -EINVAL;
if (irq >= nr_irqs)
desc = __irq_to_desc(irq);
if (!desc)
return -EINVAL;
desc = irq_to_desc(irq);
if (desc->status & IRQ_NOREQUEST)
return -EINVAL;
if (!handler)