我们知道,当使用内核共享中断时,request_irq必须要提供dev_id参数,并且dev_id的值必须唯一。那么这里提供唯一的dev_id值的究竟是做什么用的? 起先我以为dev_id的值是提供给kernel进行判断共享中断线上的哪一个设备产生了中断(即哪个irqaction产生中断),然后执行相应的中断处理函数(irqaction->handler)。实际上不是...
Request_irq的作用是申请使用IRQ并注册中断处理程序。 request_irq()函数的原型如下: int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long irqflags, const char *devname, void *dev_id); 我们知道,当使用内核共享中断时,request_irq必须要提供dev_...
我们知道,当使用内核共享中断时,request_irq必须要提供dev_id参数,并且dev_id的值必须唯一。那么这里提供唯一的dev_id值的究竟是做什么用的? 起先我以为dev_id的值是提供给kernel进行判断共享中断线上的哪一个设备产生了中断(即哪个irqaction产生中断),然后执行相应的中断处理函数(irqaction->handler)。实际上不是...
const char *devname, void *dev_id); 我们知道,当使用内核共享中断时,request_irq必须要提供dev_id参数,并且dev_id的值必须唯一。那么这里提供唯一的dev_id值的究竟是做什么用的? 起先我以为dev_id的值是提供给kernel进行判断共享中断线上的哪一个设备产生了中断(即哪个irqaction产生中断),然后执行相应的中断...
One of the check is to ensure that non-NULL dev_id is passed in the case of shared irq. Fix it by passing non-NULL dev_id while registering the shared irq. Fixes: cc2550b ("clocksource: Replace setup_irq() by request_irq()") Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail....
Second, the interrupt window request in vcpu_enter_guest() bool req_int_win = dm_request_for_irq_injection(vcpu) && kvm_cpu_accept_dm_intr(vcpu); should be kept in sync with kvm_vcpu_ready_for_interrupt_injection(): it is unnecessary to ask the processor for an interrupt window if ...
request_irq()函数的原型如下: /* kernel/irq/manage.c */ int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long irqflags, const char *devname, void *dev_id); 我们知道,当使用内核共享中断时,request_irq必须要提供dev_id参数,并且dev_id的...
devm_request_threaded_irq"时传递了"data"变量,它是一个指向"struct xxx_data"的指针,作为"dev_id...
Can anyone enlighten me why we cannot use the request_irq() here anymore? Does this means all other interrupts registering routine need use the setup_irq() in the Coldfire uClinux kernel? Thanks Xin Xie Embedded Software Engineer Noja Power Switchgear Pty Ltd ...