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Unable to HIT IRQ4 , Serial Port Driver
Hi All,
I am in process of writing a serial port driver on x86 on linux.
For some reason whenever i send some data to serial port
my IRQ4 interrupt handler is not being invoked.
1) I used register_irq(..) , register my interrupt handler , which
returns success.
2) On opening /proc/interupt file i see IRQ 4 registered by my driver ,though there is not even a single hit.
3) I have set IER(Interrupt Enable Register) low four bits to 1 to enable all serial port interrupts.
Please Suggest
Thanks
Sanjay
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