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Commit bbc9d21f authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq: Implement irq_set_handler_locked()/irq_set_chip_handler_name_locked() 



The main use case for the exisiting __irq_set_*_locked() inlines is to
replace the handler [,chip and name] of an interrupt from a region
which has the irq descriptor lock held, e.g. from the irq_set_type()
callback. The first argument is the irq number, so the functions need
so perform a pointless lookup of the interrupt descriptor for those
cases which have the irq_data pointer handy.

Provide new functions which take an irq_data pointer instead of the
interrupt number, so the lookup of the interrupt descriptor can be
avoided.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>

Conflicts:
	include/linux/irqdesc.h
parent 304adf8a

include/linux/irqdesc.h

+41 −0
Original line number Diff line number Diff line
@@ -190,6 +190,47 @@ __irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip, 
	desc->name = name;

}



/**

 * irq_set_handler_locked - Set irq handler from a locked region

 * @data:	Pointer to the irq_data structure which identifies the irq

 * @handler:	Flow control handler function for this interrupt

 *

 * Sets the handler in the irq descriptor associated to @data.

 *

 * Must be called with irq_desc locked and valid parameters. Typical

 * call site is the irq_set_type() callback.

 */

static inline void irq_set_handler_locked(struct irq_data *data,

					  irq_flow_handler_t handler)

{

	struct irq_desc *desc = irq_data_to_desc(data);



	desc->handle_irq = handler;

}



/**

 * irq_set_chip_handler_name_locked - Set chip, handler and name from a locked region

 * @data:	Pointer to the irq_data structure for which the chip is set

 * @chip:	Pointer to the new irq chip

 * @handler:	Flow control handler function for this interrupt

 * @name:	Name of the interrupt

 *

 * Replace the irq chip at the proper hierarchy level in @data and

 * sets the handler and name in the associated irq descriptor.

 *

 * Must be called with irq_desc locked and valid parameters.

 */

static inline void

irq_set_chip_handler_name_locked(struct irq_data *data, struct irq_chip *chip,

				 irq_flow_handler_t handler, const char *name)

{

	struct irq_desc *desc = irq_data_to_desc(data);



	desc->handle_irq = handler;

	desc->name = name;

	data->chip = chip;

}



static inline int irq_balancing_disabled(unsigned int irq)

{

	struct irq_desc *desc;