Commit 509853f9 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Thomas Gleixner
Browse files

genirq: Provide generic_handle_irq_safe() 



Provide generic_handle_irq_safe() which can used from any context.

Suggested-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Reviewed-by: default avatarOleksandr Natalenko <oleksandr@natalenko.name>
Reviewed-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20220211181500.1856198-2-bigeasy@linutronix.de
parent cfb92440

include/linux/irqdesc.h

+1 −0
Original line number Diff line number Diff line
@@ -160,6 +160,7 @@ static inline void generic_handle_irq_desc(struct irq_desc *desc) 


int handle_irq_desc(struct irq_desc *desc);

int generic_handle_irq(unsigned int irq);

int generic_handle_irq_safe(unsigned int irq);



#ifdef CONFIG_IRQ_DOMAIN

/*

kernel/irq/irqdesc.c

+23 −0
Original line number Diff line number Diff line
@@ -662,6 +662,29 @@ int generic_handle_irq(unsigned int irq) 
}

EXPORT_SYMBOL_GPL(generic_handle_irq);



/**

 * generic_handle_irq_safe - Invoke the handler for a particular irq from any

 *			     context.

 * @irq:	The irq number to handle

 *

 * Returns:	0 on success, a negative value on error.

 *

 * This function can be called from any context (IRQ or process context). It

 * will report an error if not invoked from IRQ context and the irq has been

 * marked to enforce IRQ-context only.

 */

int generic_handle_irq_safe(unsigned int irq)

{

	unsigned long flags;

	int ret;



	local_irq_save(flags);

	ret = handle_irq_desc(irq_to_desc(irq));

	local_irq_restore(flags);

	return ret;

}

EXPORT_SYMBOL_GPL(generic_handle_irq_safe);



#ifdef CONFIG_IRQ_DOMAIN

/**

 * generic_handle_domain_irq - Invoke the handler for a HW irq belonging