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genirq: Provide generic_handle_irq_safe()

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Provide generic_handle_irq_safe() which can used from any context.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20220211181500.1856198-2-bigeasy@linutronix.de
This commit is contained in:
Sebastian Andrzej Siewior 2022-02-11 19:14:54 +01:00 • committed by Thomas Gleixner
parent cfb92440ee
commit 509853f9e1
2 changed files with 24 additions and 0 deletions
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1
include/linux/irqdesc.h
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@ -160,6 +160,7 @@ static inline void generic_handle_irq_desc(struct irq_desc *desc)
int 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(unsigned int irq);
int generic_handle_irq_safe(unsigned int irq);
#ifdef CONFIG_IRQ_DOMAIN #ifdef CONFIG_IRQ_DOMAIN
/* /*

23
kernel/irq/irqdesc.c
View file

@ -662,6 +662,29 @@ int generic_handle_irq(unsigned int irq)
} }
EXPORT_SYMBOL_GPL(generic_handle_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 #ifdef CONFIG_IRQ_DOMAIN
/** /**
* generic_handle_domain_irq - Invoke the handler for a HW irq belonging * generic_handle_domain_irq - Invoke the handler for a HW irq belonging