handle_edge_irq(9) - phpMan
HANDLE_EDGE_IRQ(9) Public Functions Provided HANDLE_EDGE_IRQ(9)
NAME
handle_edge_irq - edge type IRQ handler
SYNOPSIS
void handle_edge_irq(struct irq_desc * desc);
ARGUMENTS
desc
the interrupt description structure for this irq
DESCRIPTION
Interrupt occures on the falling and/or rising edge of a hardware signal. The occurrence
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 associated 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 AT linutronix.de>
Author.
Ingo Molnar <mingo AT elte.hu>
Author.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 HANDLE_EDGE_IRQ(9)
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