handle_edge_irq(9)
NAME
handle_edge_irq - edge type IRQ handler
SYNOPSIS
void handle_edge_irq(unsigned int irq, struct irq_desc * desc);
ARGUMENTS
- irq
- the interrupt number
- desc
- the interrupt description structure for this irq
DESCRIPTION
Interrupt occures on the falling and/or rising edge of a hardware
signal. The occurence is latched into the irq controller hardware and
must be acked in order to be reenabled. After the ack another interrupt
can happen on the same source even before the first one is handled by
the assosiacted event handler. If this happens it might be necessary to
disable (mask) the interrupt depending on the controller hardware. This
requires to reenable the interrupt inside of the loop which handles the
interrupts which have arrived while the handler was running. If all
pending interrupts are handled, the loop is left.
AUTHORS
- Thomas Gleixner <tglx@linutronix.de>
- Author.
- Ingo Molnar <mingo@elte.hu>
- Author.