NAME
rtl_request_irq, rtl_free_irq - install and remove inter
rupt handlers
SYNOPSIS
#include <rtl_core.h>
int rtl_request_irq(unsigned int irq, unsigned int (*han
dler)(unsigned int irq, struct pt_regs *regs));
int rtl_free_irq(unsigned int irq);
DESCRIPTION
These functions are specific to Real-Time Linux.
rtl_request_irq registers the function handler as the
interrupt handler for IRQ level irq. The handler will be
executed with hardware interrupts disabled. Note: on the
x86 architecture the interrupt will not be enabled in the
controller after the handler execution. If it is neces
sary to receive further interrupts from this device, the
rtl_hard_enable_irq(3) function must be used.
rtl_free_irq removes the interrupt handler for IRQ level
irq.
RETURN VALUE
All functions return 0 on success and a negative error
code on error.
ERRORS
-EBUSY rtl_request_irq: interrupt handler is already
installed for this interrupt level.
-EINVAL
rtl_free_irq: there is no handler currently
installed for this interrupt level.
AUTHOR
Michael Barabanov <baraban@fsmlabs.com>
SEE ALSO
rtl_hard_enable_irq(3), rtl_hard_disable_irq(3)
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