diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-04-13 09:06:41 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-04-18 13:40:00 -0500 |
| commit | 25ce4be72411867e0471908ee9319599035cc624 (patch) | |
| tree | 1c29262ad5fb60ba2fd8d68e58be2c74fb848297 | |
| parent | a7e60e55d73c39df7bcfedb6ccf9b6b1100d960d (diff) | |
genirq: Return the IRQ name from free_irq()
This allows callers to get back at them instead of having to store it in
another variable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | include/linux/interrupt.h | 2 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 13 |
2 files changed, 11 insertions, 4 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 53144e78a369..a6fba4804672 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -155,7 +155,7 @@ extern int __must_check request_percpu_irq(unsigned int irq, irq_handler_t handler, const char *devname, void __percpu *percpu_dev_id); -extern void free_irq(unsigned int, void *); +extern const void *free_irq(unsigned int, void *); extern void free_percpu_irq(unsigned int, void __percpu *); struct device; diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 391cb738b2db..e688e7e06772 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1574,20 +1574,27 @@ EXPORT_SYMBOL_GPL(remove_irq); * have completed. * * This function must not be called from interrupt context. + * + * Returns the devname argument passed to request_irq. */ -void free_irq(unsigned int irq, void *dev_id) +const void *free_irq(unsigned int irq, void *dev_id) { struct irq_desc *desc = irq_to_desc(irq); + struct irqaction *action; + const char *devname; if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc))) - return; + return NULL; #ifdef CONFIG_SMP if (WARN_ON(desc->affinity_notify)) desc->affinity_notify = NULL; #endif - kfree(__free_irq(irq, dev_id)); + action = __free_irq(irq, dev_id); + devname = action->name; + kfree(action); + return devname; } EXPORT_SYMBOL(free_irq); |