disable_irq(9) [centos man page]

DISABLE_IRQ(9)						     Public Functions Provided						    DISABLE_IRQ(9)

NAME

       disable_irq - disable an irq and wait for completion

SYNOPSIS

       void disable_irq(unsigned int irq);

ARGUMENTS

       irq
	   Interrupt to disable

DESCRIPTION

       Disable the selected interrupt line. Enables and Disables are nested. This function waits for any pending IRQ handlers for this interrupt
       to complete before returning. If you use this function while holding a resource the IRQ handler may need you will deadlock.

       This function may be called - with care - from IRQ context.

AUTHORS

       Thomas Gleixner <tglx@linutronix.de>
	   Author.

       Ingo Molnar <mingo@elte.hu>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							    DISABLE_IRQ(9)

STRUCT 
IRQ_DESC(9)						    Structures							STRUCT IRQ_DESC(9)

NAME

       struct_irq_desc - interrupt descriptor

SYNOPSIS

       struct irq_desc {
	 unsigned int irq;
	 struct timer_rand_state * timer_rand_state;
	 unsigned int * kstat_irqs;
       #ifdef CONFIG_INTR_REMAP
	 struct irq_2_iommu * irq_2_iommu;
       #endif
	 irq_flow_handler_t handle_irq;
	 struct irq_chip * chip;
	 struct msi_desc * msi_desc;
	 void * handler_data;
	 void * chip_data;
	 struct irqaction * action;
	 unsigned int status;
	 unsigned int depth;
	 unsigned int wake_depth;
	 unsigned int irq_count;
	 unsigned long last_unhandled;
	 unsigned int irqs_unhandled;
	 raw_spinlock_t lock;
       #ifdef CONFIG_SMP
	 cpumask_var_t affinity;
	 unsigned int node;
       #ifdef CONFIG_GENERIC_PENDING_IRQ
	 cpumask_var_t pending_mask;
       #endif
       #endif
	 atomic_t threads_active;
	 wait_queue_head_t wait_for_threads;
       #ifdef CONFIG_PROC_FS
	 struct proc_dir_entry * dir;
       #endif
	 const char * name;
       };

MEMBERS

       irq
	   interrupt number for this descriptor

       timer_rand_state
	   pointer to timer rand state struct

       kstat_irqs
	   irq stats per cpu

       irq_2_iommu
	   iommu with this irq

       handle_irq
	   highlevel irq-events handler [if NULL, __do_IRQ]

       chip
	   low level interrupt hardware access

       msi_desc
	   MSI descriptor

       handler_data
	   per-IRQ data for the irq_chip methods

       chip_data
	   platform-specific per-chip private data for the chip methods, to allow shared chip implementations

       action
	   the irq action chain

       status
	   status information

       depth
	   disable-depth, for nested irq_disable calls

       wake_depth
	   enable depth, for multiple set_irq_wake callers

       irq_count
	   stats field to detect stalled irqs

       last_unhandled
	   aging timer for unhandled count

       irqs_unhandled
	   stats field for spurious unhandled interrupts

       lock
	   locking for SMP

       affinity
	   IRQ affinity on SMP

       node
	   node index useful for balancing

       pending_mask
	   pending rebalanced interrupts

       threads_active
	   number of irqaction threads currently running

       wait_for_threads
	   wait queue for sync_irq to wait for threaded handlers

       dir
	   /proc/irq/ procfs entry

       name
	   flow handler name for /proc/interrupts output

AUTHORS

       Thomas Gleixner <tglx@linutronix.de>
	   Author.

       Ingo Molnar <mingo@elte.hu>
	   Author.

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010							STRUCT IRQ_DESC(9)