Hi all, I'm writing a serial port driver for 16550A UART on a 2.4.18 kernel for learning purpose. The problem i'm facing is that after i remove my module (rmmod it) and then run the userspace program that tries to open my device (ttyS0 - IRQ 4) the kernel oops saying "Unable to handle virtual page request at - <some address> EIP ..... irq handler - not syncing" The address that it displays during oops is the address that is shown in /proc/ksyms file against my IRQ handler before i removed my module. I'm attaching my driver file as well as the userspace prog. i used to test it with. It's based on serial.c (u'll find some uneccessary code in it, which u ignore). If somebody could tell me what i'm doing wrong....... btw i've compiled my kernel with support for 8250, 16550... UARTs TIA - /dev/mandeep <<mss_serial.c>> <<test_serial.c>>
Attachment:
mss_serial.c
Description: mss_serial.c
Attachment:
test_serial.c
Description: test_serial.c
