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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2022-02-11 19:14:54 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-02-21 11:31:06 +0100 |
| commit | 509853f9e1e7b1490dc79f735a5dbafc9298f40d (patch) | |
| tree | ed7a7c7927bb7a7e974c16308d3e5f1241dd5f65 | |
| parent | cfb92440ee71adcc2105b0890bb01ac3cddb8507 (diff) | |
| download | linux-509853f9e1e7b1490dc79f735a5dbafc9298f40d.tar.gz linux-509853f9e1e7b1490dc79f735a5dbafc9298f40d.tar.bz2 linux-509853f9e1e7b1490dc79f735a5dbafc9298f40d.zip | |
genirq: Provide generic_handle_irq_safe()
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
| -rw-r--r-- | include/linux/irqdesc.h | 1 | ||||
| -rw-r--r-- | kernel/irq/irqdesc.c | 23 |
2 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index 93d270ca0c56..a77584593f7d 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 2267e6527db3..346d283d2da1 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -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 |