[greybus-dev] Re: [PATCH 1/7] genirq: Provide generic_handle_irq_safe().

Hello.

On čtvrtek 27. ledna 2022 12:32:57 CET Sebastian Andrzej Siewior wrote:

Provide generic_handle_irq_safe() which can be used can used from any context.

Suggested-by: Thomas Gleixner tglx@linutronix.de Signed-off-by: Sebastian Andrzej Siewior bigeasy@linutronix.de

---

include/linux/irqdesc.h | 1 + kernel/irq/irqdesc.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+)

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index 93d270ca0c567..a77584593f7d1 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -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 /* diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 2267e6527db3c..97223df2f460e 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -662,6 +662,27 @@ int generic_handle_irq(unsigned int irq) } EXPORT_SYMBOL_GPL(generic_handle_irq); +/**

• • generic_handle_irq_safe - Invoke the handler for a particular irq
• • @irq: The irq number to handle
• • Returns: 0 on success, or -EINVAL if conversion has failed
• • This function must be called either from an IRQ context with irq regs
• • initialized or with care from any context.
• */

+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

Reviewed-by: Oleksandr Natalenko oleksandr@natalenko.name

Thank you.