1#include <linux/module.h>
2#include <linux/interrupt.h>
3#include <linux/device.h>
4#include <linux/gfp.h>
5
6
7
8
9struct irq_devres {
10 unsigned int irq;
11 void *dev_id;
12};
13
14static void devm_irq_release(struct device *dev, void *res)
15{
16 struct irq_devres *this = res;
17
18 free_irq(this->irq, this->dev_id);
19}
20
21static int devm_irq_match(struct device *dev, void *res, void *data)
22{
23 struct irq_devres *this = res, *match = data;
24
25 return this->irq == match->irq && this->dev_id == match->dev_id;
26}
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46
47int devm_request_threaded_irq(struct device *dev, unsigned int irq,
48 irq_handler_t handler, irq_handler_t thread_fn,
49 unsigned long irqflags, const char *devname,
50 void *dev_id)
51{
52 struct irq_devres *dr;
53 int rc;
54
55 dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
56 GFP_KERNEL);
57 if (!dr)
58 return -ENOMEM;
59
60 rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname,
61 dev_id);
62 if (rc) {
63 devres_free(dr);
64 return rc;
65 }
66
67 dr->irq = irq;
68 dr->dev_id = dev_id;
69 devres_add(dev, dr);
70
71 return 0;
72}
73EXPORT_SYMBOL(devm_request_threaded_irq);
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85
86void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id)
87{
88 struct irq_devres match_data = { irq, dev_id };
89
90 free_irq(irq, dev_id);
91 WARN_ON(devres_destroy(dev, devm_irq_release, devm_irq_match,
92 &match_data));
93}
94EXPORT_SYMBOL(devm_free_irq);
95