forked from Minki/linux
genirq: Sanitize dynamic irq handling
Use the cleanup functions of the dynamic allocator. No need to have separate implementations. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
parent
b7d0d8258a
commit
b7b29338dc
@ -326,11 +326,15 @@ extern unsigned int create_irq_nr(unsigned int irq_want, int node);
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extern int create_irq(void);
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extern void destroy_irq(unsigned int irq);
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/* Dynamic irq helper functions */
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extern void dynamic_irq_init(unsigned int irq);
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void dynamic_irq_init_keep_chip_data(unsigned int irq);
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/*
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* Dynamic irq helper functions. Obsolete. Use irq_alloc_desc* and
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* irq_free_desc instead.
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*/
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extern void dynamic_irq_cleanup(unsigned int irq);
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void dynamic_irq_cleanup_keep_chip_data(unsigned int irq);
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static inline void dynamic_irq_init(unsigned int irq)
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{
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dynamic_irq_cleanup(irq);
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}
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/* Set/get chip/data for an IRQ: */
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extern int set_irq_chip(unsigned int irq, struct irq_chip *chip);
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@ -18,108 +18,6 @@
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#include "internals.h"
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static void dynamic_irq_init_x(unsigned int irq, bool keep_chip_data)
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{
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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 (!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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raw_spin_lock_irqsave(&desc->lock, flags);
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desc->status = IRQ_DEFAULT_INIT_FLAGS;
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desc->irq_data.chip = &no_irq_chip;
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desc->handle_irq = handle_bad_irq;
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desc->depth = 1;
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desc->irq_data.msi_desc = NULL;
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desc->irq_data.handler_data = NULL;
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if (!keep_chip_data)
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desc->irq_data.chip_data = NULL;
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desc->action = NULL;
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desc->irq_count = 0;
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desc->irqs_unhandled = 0;
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#ifdef CONFIG_SMP
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cpumask_setall(desc->irq_data.affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_clear(desc->pending_mask);
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#endif
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#endif
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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}
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/**
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* dynamic_irq_init - initialize a dynamically allocated irq
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* @irq: irq number to initialize
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*/
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void dynamic_irq_init(unsigned int irq)
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{
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dynamic_irq_init_x(irq, false);
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}
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/**
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* dynamic_irq_init_keep_chip_data - initialize a dynamically allocated irq
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* @irq: irq number to initialize
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*
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* does not set irq_to_desc(irq)->irq_data.chip_data to NULL
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*/
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void dynamic_irq_init_keep_chip_data(unsigned int irq)
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{
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dynamic_irq_init_x(irq, true);
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}
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static void dynamic_irq_cleanup_x(unsigned int irq, bool keep_chip_data)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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unsigned long flags;
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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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raw_spin_lock_irqsave(&desc->lock, flags);
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if (desc->action) {
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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WARN(1, KERN_ERR "Destroying IRQ%d without calling free_irq\n",
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irq);
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return;
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}
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desc->irq_data.msi_desc = NULL;
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desc->irq_data.handler_data = NULL;
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if (!keep_chip_data)
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desc->irq_data.chip_data = NULL;
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desc->handle_irq = handle_bad_irq;
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desc->irq_data.chip = &no_irq_chip;
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desc->name = NULL;
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clear_kstat_irqs(desc);
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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}
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/**
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* dynamic_irq_cleanup - cleanup a dynamically allocated irq
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* @irq: irq number to initialize
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*/
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void dynamic_irq_cleanup(unsigned int irq)
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{
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dynamic_irq_cleanup_x(irq, false);
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}
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/**
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* dynamic_irq_cleanup_keep_chip_data - cleanup a dynamically allocated irq
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* @irq: irq number to initialize
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*
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* does not set irq_to_desc(irq)->irq_data.chip_data to NULL
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*/
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void dynamic_irq_cleanup_keep_chip_data(unsigned int irq)
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{
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dynamic_irq_cleanup_x(irq, true);
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}
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/**
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* set_irq_chip - set the irq chip for an irq
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* @irq: irq number
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@ -20,7 +20,6 @@ extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
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extern struct lock_class_key irq_desc_lock_class;
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extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
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extern void clear_kstat_irqs(struct irq_desc *desc);
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extern raw_spinlock_t sparse_irq_lock;
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/* Resending of interrupts :*/
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@ -53,12 +53,21 @@ static void desc_smp_init(struct irq_desc *desc, int node)
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{
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desc->irq_data.node = node;
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cpumask_copy(desc->irq_data.affinity, irq_default_affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_clear(desc->pending_mask);
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#endif
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}
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static inline int desc_node(struct irq_desc *desc)
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{
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return desc->irq_data.node;
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}
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#else
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static inline int
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alloc_masks(struct irq_desc *desc, gfp_t gfp, int node) { return 0; }
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static inline void desc_smp_init(struct irq_desc *desc, int node) { }
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static inline int desc_node(struct irq_desc *desc) { return 0; }
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#endif
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static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
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@ -71,6 +80,8 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
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desc->status = IRQ_DEFAULT_INIT_FLAGS;
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desc->handle_irq = handle_bad_irq;
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desc->depth = 1;
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desc->irq_count = 0;
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desc->irqs_unhandled = 0;
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desc->name = NULL;
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memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
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desc_smp_init(desc, node);
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@ -286,23 +297,9 @@ struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node)
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return irq_to_desc(irq);
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}
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#ifdef CONFIG_SMP
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static inline int desc_node(struct irq_desc *desc)
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{
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return desc->irq_data.node;
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}
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#else
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static inline int desc_node(struct irq_desc *desc) { return 0; }
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#endif
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static void free_desc(unsigned int irq)
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{
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struct irq_desc *desc = irq_to_desc(irq);
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unsigned long flags;
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raw_spin_lock_irqsave(&desc->lock, flags);
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desc_set_defaults(irq, desc, desc_node(desc));
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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dynamic_irq_cleanup(irq);
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}
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static inline int alloc_descs(unsigned int start, unsigned int cnt, int node)
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@ -409,10 +406,18 @@ unsigned int irq_get_next_irq(unsigned int offset)
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return find_next_bit(allocated_irqs, nr_irqs, offset);
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}
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/* Statistics access */
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void clear_kstat_irqs(struct irq_desc *desc)
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/**
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* dynamic_irq_cleanup - cleanup a dynamically allocated irq
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* @irq: irq number to initialize
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*/
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void dynamic_irq_cleanup(unsigned int irq)
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{
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memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
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struct irq_desc *desc = irq_to_desc(irq);
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unsigned long flags;
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raw_spin_lock_irqsave(&desc->lock, flags);
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desc_set_defaults(irq, desc, desc_node(desc));
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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}
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unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
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