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@linutronix.de>
    Author.

Ingo Molnar <mingo@elte.hu>
    Author.

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