Hi all,

Please help me to solve the issue in interrupt handler module for linux.

I am able to register the IRQ successfully. But my interrupt handler is not responding properly when I get a hardware interrupt.

Interrupt Status registers are responding properly when external interrupt occurs. But the following message"LOS interrupt has been occured " is not displaying in the kernel prompt.


Please have a look at the following code :

static int irq_handler(int irq, void *dev_id)
{

printk("LOS interrupt has been occured\n");
return IRQ_HANDLED;
}




static int __init ofalc_init(void)
{

free_irq(0x14,NULL);
retval= request_irq(0x14,irq_handler,SA_SAMPLE_RANDOM,"ofalc",NULL);
if(retval)
{
if(retval == -EINVAL)
{
printk("invalid IRQ\n");
}
else if(retval == -EBUSY){
printk("IRQ already assigned\n");
}




}
else{
printk("ret_value = %u : IRQ request has been succeeded\n",retval);
}
return 0;
}



Regards
Remya

First of all you should not post such questions in introduction forums. It would have been better if you would have posted it here http://www.linuxquestions.org/questi...nux-kernel-70/

Anyways, can you tell me for which device you are writing the interrupt handler?
I am asking you this question coz i've already written an interrupt handler for the "keyboard" and the "serial port". You can refer to the code in this link. You'll get a general idea where you are going wrong.

Kindly read the 3rd post of the following thread:

http://www.linuxquestions.org/questi...5/#post3733767