DISABLE_HARDIRQ(9)                  Public Functions Provided                  DISABLE_HARDIRQ(9)



NAME
       disable_hardirq - disables an irq and waits for hardirq completion

SYNOPSIS
       bool disable_hardirq(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 hard IRQ handlers for this interrupt to complete before returning. If you
       use this function while holding a resource the hard IRQ handler may need you will
       deadlock.

       When used to optimistically disable an interrupt from atomic context the return value must
       be checked.

RETURN
       false if a threaded handler is active.

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

AUTHORS
       Thomas Gleixner <tglx AT linutronix.de>
           Author.

       Ingo Molnar <mingo AT elte.hu>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                        DISABLE_HARDIRQ(9)