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genirq: add unlocked version of set_irq_handler()

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Add unlocked version for use by irq_chip.set_type handlers which may
wish to change handler to level or edge handler when IRQ type is
changed.

The normal set_irq_handler() call cannot be used because it tries to
take irq_desc.lock which is already held when the irq_chip.set_type
hook is called.

Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Kevin Hilman 2007-12-18 18:05:58 +01:00 committed by Ingo Molnar
parent cdc6f27d9e
commit b019e57321
1 changed files with 7 additions and 0 deletions
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7
include/linux/irq.h
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@ -339,6 +339,13 @@ extern void
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name); const char *name);
/* caller has locked the irq_desc and both params are valid */
static inline void __set_irq_handler_unlocked(int irq,
irq_flow_handler_t handler)
{
irq_desc[irq].handle_irq = handler;
}
/* /*
* Set a highlevel flow handler for a given IRQ: * Set a highlevel flow handler for a given IRQ:
*/ */