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genirq: Clarify documentation for request_threaded_irq()

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Clarify wording and document commonly used IRQF_ONESHOT flag.

Signed-off-by: Joel Savitz <jsavitz@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210731050740.444454-1-jsavitz@redhat.com
This commit is contained in:
Joel Savitz 2021-07-31 01:07:40 -04:00 committed by Thomas Gleixner
parent 428e211641
commit 61377ec144
1 changed files with 5 additions and 3 deletions
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8
kernel/irq/manage.c
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@ -2072,9 +2072,9 @@ const void *free_nmi(unsigned int irq, void *dev_id)
* request_threaded_irq - allocate an interrupt line * request_threaded_irq - allocate an interrupt line
* @irq: Interrupt line to allocate * @irq: Interrupt line to allocate
* @handler: Function to be called when the IRQ occurs. * @handler: Function to be called when the IRQ occurs.
* Primary handler for threaded interrupts * Primary handler for threaded interrupts.
* If NULL and thread_fn != NULL the default * If handler is NULL and thread_fn != NULL
* primary handler is installed * the default primary handler is installed.
* @thread_fn: Function called from the irq handler thread * @thread_fn: Function called from the irq handler thread
* If NULL, no irq thread is created * If NULL, no irq thread is created
* @irqflags: Interrupt type flags * @irqflags: Interrupt type flags
@ -2108,6 +2108,8 @@ const void *free_nmi(unsigned int irq, void *dev_id)
* *
* IRQF_SHARED Interrupt is shared * IRQF_SHARED Interrupt is shared
* IRQF_TRIGGER_* Specify active edge(s) or level * IRQF_TRIGGER_* Specify active edge(s) or level
* IRQF_ONESHOT Do not unmask interrupt line until
* thread_fn returns
* *
*/ */
int request_threaded_irq(unsigned int irq, irq_handler_t handler, int request_threaded_irq(unsigned int irq, irq_handler_t handler,