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genirq: Add devm_request_any_context_irq() 

Some drivers use request_any_context_irq() but there isn't a
devm_* function for it. Add one so that these drivers don't need
to explicitly free the irq on driver detach.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: http://lkml.kernel.org/r/1388709460-19222-3-git-send-email-sboyd@codeaurora.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hifive-unleashed-5.1
Stephen Boyd 2014-01-02 16:37:32 -08:00 committed by Thomas Gleixner
parent 494479038d
commit 0668d30651
2 changed files with 50 additions and 0 deletions
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5
include/linux/interrupt.h
View File

@ -158,6 +158,11 @@ devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler,
devname, dev_id);
}
extern int __must_check
devm_request_any_context_irq(struct device *dev, unsigned int irq,
irq_handler_t handler, unsigned long irqflags,
const char *devname, void *dev_id);
extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id);
/*

45
kernel/irq/devres.c
View File

@ -72,6 +72,51 @@ int devm_request_threaded_irq(struct device *dev, unsigned int irq,
}
EXPORT_SYMBOL(devm_request_threaded_irq);
/**
* devm_request_any_context_irq - allocate an interrupt line for a managed device
* @dev: device to request interrupt for
* @irq: Interrupt line to allocate
* @handler: Function to be called when the IRQ occurs
* @thread_fn: function to be called in a threaded interrupt context. NULL
* for devices which handle everything in @handler
* @irqflags: Interrupt type flags
* @devname: An ascii name for the claiming device
* @dev_id: A cookie passed back to the handler function
*
* Except for the extra @dev argument, this function takes the
* same arguments and performs the same function as
* request_any_context_irq(). IRQs requested with this function will be
* automatically freed on driver detach.
*
* If an IRQ allocated with this function needs to be freed
* separately, devm_free_irq() must be used.
*/
int devm_request_any_context_irq(struct device *dev, unsigned int irq,
irq_handler_t handler, unsigned long irqflags,
const char *devname, void *dev_id)
{
struct irq_devres *dr;
int rc;
dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
GFP_KERNEL);
if (!dr)
return -ENOMEM;
rc = request_any_context_irq(irq, handler, irqflags, devname, dev_id);
if (rc) {
devres_free(dr);
return rc;
}
dr->irq = irq;
dr->dev_id = dev_id;
devres_add(dev, dr);
return 0;
}
EXPORT_SYMBOL(devm_request_any_context_irq);
/**
* devm_free_irq - free an interrupt
* @dev: device to free interrupt for