Function report |
Source Code:kernel\irq\manage.c |
Create Date:2022-07-28 10:09:23 |
| Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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| Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:Internal function that tells the architecture code whether a* particular irq has been exclusively allocated or is available* for driver use.
Proto:int can_request_irq(unsigned int irq, unsigned long irqflags)
Type:int
Parameter:
| Type | Parameter | Name |
|---|---|---|
| unsigned int | irq | |
| unsigned long | irqflags |
| 734 | desc = irq_get_desc_lock(irq, & flags, 0) |
| 735 | canrequest = 0 |
| 737 | If Not desc Then Return 0 |
| 740 | If irq_settings_can_request(desc) Then |
| 741 | If Not IRQ action list || irqflags & flags & allow sharing the irq among several devices Then canrequest = 1 |
| 745 | irq_put_desc_unlock(desc, flags) |
| 746 | Return canrequest |
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