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>
This commit is contained in:
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46b8214d12
commit
7d94f7ca40
4 changed files with 55 additions and 48 deletions
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@ -400,7 +400,6 @@ static inline void io_apic_sync(unsigned int apic)
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struct irq_cfg *cfg; \
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struct irq_pin_list *entry; \
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\
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BUG_ON(irq >= nr_irqs); \
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cfg = irq_cfg(irq); \
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entry = cfg->irq_2_pin; \
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for (;;) { \
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@ -480,7 +479,6 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector)
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struct irq_cfg *cfg;
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struct irq_pin_list *entry;
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BUG_ON(irq >= nr_irqs);
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cfg = irq_cfg(irq);
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entry = cfg->irq_2_pin;
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for (;;) {
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@ -549,7 +547,6 @@ static void add_pin_to_irq(unsigned int irq, int apic, int pin)
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struct irq_cfg *cfg;
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struct irq_pin_list *entry;
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BUG_ON(irq >= nr_irqs);
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/* first time to refer irq_cfg, so with new */
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cfg = irq_cfg_alloc(irq);
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entry = cfg->irq_2_pin;
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@ -841,7 +838,6 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
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best_guess = irq;
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}
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}
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BUG_ON(best_guess >= nr_irqs);
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return best_guess;
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}
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@ -973,7 +969,6 @@ static int pin_2_irq(int idx, int apic, int pin)
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irq += nr_ioapic_registers[i++];
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irq += pin;
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}
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BUG_ON(irq >= nr_irqs);
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return irq;
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}
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@ -1008,7 +1003,6 @@ static int __assign_irq_vector(int irq, cpumask_t mask)
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int cpu;
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struct irq_cfg *cfg;
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BUG_ON((unsigned)irq >= nr_irqs);
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cfg = irq_cfg(irq);
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/* Only try and allocate irqs on cpus that are present */
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@ -1082,7 +1076,6 @@ static void __clear_irq_vector(int irq)
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cpumask_t mask;
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int cpu, vector;
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BUG_ON((unsigned)irq >= nr_irqs);
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cfg = irq_cfg(irq);
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BUG_ON(!cfg->vector);
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@ -1924,8 +1917,6 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
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struct irq_desc *desc;
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struct irq_cfg *cfg;
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irq = __get_cpu_var(vector_irq)[vector];
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if (irq >= nr_irqs)
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continue;
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desc = irq_to_desc(irq);
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cfg = irq_cfg(irq);
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@ -202,7 +202,7 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
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stack_overflow_check(regs);
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#endif
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if (likely(irq < nr_irqs))
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if (likely(__irq_to_desc(irq)))
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generic_handle_irq(irq);
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else {
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if (!disable_apic)
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@ -27,13 +27,13 @@ void dynamic_irq_init(unsigned int irq)
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = irq_to_desc(irq);
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if (!desc) {
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WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
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return;
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}
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/* Ensure we don't have left over values from a previous use of this irq */
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desc = irq_to_desc(irq);
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spin_lock_irqsave(&desc->lock, flags);
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desc->status = IRQ_DISABLED;
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desc->chip = &no_irq_chip;
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@ -60,12 +60,12 @@ void dynamic_irq_cleanup(unsigned int irq)
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
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return;
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}
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desc = irq_to_desc(irq);
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spin_lock_irqsave(&desc->lock, flags);
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if (desc->action) {
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spin_unlock_irqrestore(&desc->lock, flags);
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@ -92,7 +92,8 @@ int set_irq_chip(unsigned int irq, struct irq_chip *chip)
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
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return -EINVAL;
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}
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@ -121,12 +122,12 @@ int set_irq_type(unsigned int irq, unsigned int type)
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unsigned long flags;
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int ret = -ENXIO;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
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return -ENODEV;
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}
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desc = irq_to_desc(irq);
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if (type == IRQ_TYPE_NONE)
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return 0;
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@ -149,13 +150,13 @@ int set_irq_data(unsigned int irq, void *data)
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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printk(KERN_ERR
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"Trying to install controller data for IRQ%d\n", irq);
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return -EINVAL;
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}
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desc = irq_to_desc(irq);
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spin_lock_irqsave(&desc->lock, flags);
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desc->handler_data = data;
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spin_unlock_irqrestore(&desc->lock, flags);
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@ -175,12 +176,13 @@ int set_irq_msi(unsigned int irq, struct msi_desc *entry)
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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printk(KERN_ERR
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"Trying to install msi data for IRQ%d\n", irq);
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return -EINVAL;
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}
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desc = irq_to_desc(irq);
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spin_lock_irqsave(&desc->lock, flags);
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desc->msi_desc = entry;
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if (entry)
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@ -201,8 +203,14 @@ int set_irq_chip_data(unsigned int irq, void *data)
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struct irq_desc *desc;
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unsigned long flags;
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desc = irq_to_desc(irq);
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if (irq >= nr_irqs || !desc->chip) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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printk(KERN_ERR
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"Trying to install chip data for IRQ%d\n", irq);
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return -EINVAL;
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}
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if (!desc->chip) {
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printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq);
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return -EINVAL;
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}
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@ -546,14 +554,13 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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printk(KERN_ERR
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"Trying to install type control for IRQ%d\n", irq);
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return;
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}
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desc = irq_to_desc(irq);
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if (!handle)
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handle = handle_bad_irq;
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else if (desc->chip == &no_irq_chip) {
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@ -611,14 +618,13 @@ void __init set_irq_noprobe(unsigned int irq)
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
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return;
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}
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desc = irq_to_desc(irq);
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spin_lock_irqsave(&desc->lock, flags);
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desc->status |= IRQ_NOPROBE;
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spin_unlock_irqrestore(&desc->lock, flags);
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@ -629,14 +635,13 @@ void __init set_irq_probe(unsigned int irq)
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs) {
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desc = __irq_to_desc(irq);
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if (!desc) {
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printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
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return;
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}
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desc = irq_to_desc(irq);
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spin_lock_irqsave(&desc->lock, flags);
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desc->status &= ~IRQ_NOPROBE;
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spin_unlock_irqrestore(&desc->lock, flags);
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@ -31,10 +31,10 @@ cpumask_t irq_default_affinity = CPU_MASK_ALL;
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*/
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void synchronize_irq(unsigned int irq)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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struct irq_desc *desc = __irq_to_desc(irq);
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unsigned int status;
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if (irq >= nr_irqs)
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if (!desc)
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return;
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do {
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@ -142,10 +142,11 @@ int irq_select_affinity(unsigned int irq)
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*/
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void disable_irq_nosync(unsigned int irq)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs)
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desc = __irq_to_desc(irq);
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if (!desc)
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return;
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spin_lock_irqsave(&desc->lock, flags);
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@ -171,9 +172,10 @@ EXPORT_SYMBOL(disable_irq_nosync);
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*/
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void disable_irq(unsigned int irq)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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struct irq_desc *desc;
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if (irq >= nr_irqs)
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desc = __irq_to_desc(irq);
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if (!desc)
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return;
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disable_irq_nosync(irq);
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@ -213,10 +215,11 @@ static void __enable_irq(struct irq_desc *desc, unsigned int irq)
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*/
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void enable_irq(unsigned int irq)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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struct irq_desc *desc;
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unsigned long flags;
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if (irq >= nr_irqs)
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desc = __irq_to_desc(irq);
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if (!desc)
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return;
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spin_lock_irqsave(&desc->lock, flags);
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@ -290,10 +293,14 @@ EXPORT_SYMBOL(set_irq_wake);
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*/
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int can_request_irq(unsigned int irq, unsigned long irqflags)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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struct irq_desc *desc;
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struct irqaction *action;
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if (irq >= nr_irqs || desc->status & IRQ_NOREQUEST)
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desc = __irq_to_desc(irq);
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if (!desc)
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return 0;
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if (desc->status & IRQ_NOREQUEST)
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return 0;
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action = desc->action;
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@ -352,14 +359,15 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
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*/
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int setup_irq(unsigned int irq, struct irqaction *new)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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struct irq_desc *desc;
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struct irqaction *old, **p;
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const char *old_name = NULL;
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unsigned long flags;
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int shared = 0;
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int ret;
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if (irq >= nr_irqs)
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desc = __irq_to_desc(irq);
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if (!desc)
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return -EINVAL;
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if (desc->chip == &no_irq_chip)
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@ -518,10 +526,11 @@ void free_irq(unsigned int irq, void *dev_id)
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unsigned long flags;
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WARN_ON(in_interrupt());
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if (irq >= nr_irqs)
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desc = __irq_to_desc(irq);
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if (!desc)
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return;
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desc = irq_to_desc(irq);
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spin_lock_irqsave(&desc->lock, flags);
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p = &desc->action;
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for (;;) {
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@ -634,9 +643,11 @@ int request_irq(unsigned int irq, irq_handler_t handler,
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*/
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if ((irqflags & IRQF_SHARED) && !dev_id)
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return -EINVAL;
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if (irq >= nr_irqs)
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desc = __irq_to_desc(irq);
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if (!desc)
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return -EINVAL;
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desc = irq_to_desc(irq);
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if (desc->status & IRQ_NOREQUEST)
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return -EINVAL;
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if (!handler)
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