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Commit 0668d306 authored by Stephen Boyd's avatar Stephen Boyd Committed by Thomas Gleixner
Browse files

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: default avatarStephen 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: default avatarThomas Gleixner <tglx@linutronix.de>
parent 49447903

include/linux/interrupt.h

+5 −0
Original line number Diff line number Diff line
@@ -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);



/*

kernel/irq/devres.c

+45 −0
Original line number Diff line number Diff line
@@ -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