Re: Linux 2.6.17: IRQ handler mismatch in serial code?

Russell King
2006-06-19T18:47:06Z

On Mon, Jun 19, 2006 at 07:06:58PM +0100, Chris Rankin wrote:
> I have just booted Linux 2.6.17 on an old 350 MHz PII, and have
> discovered this message in the boot log:
>
> setup_irq: irq handler mismatch
> <c0131a86> setup_irq+0x10d/0x11a <c01f3889> serial8250_interrupt+0x0/0x107
> <c0131b00> request_irq+0x6d/0x89 <c01f34ba> serial8250_startup+0x2d6/0x42b
> <c01f01e1> uart_startup+0x64/0x121 <c01f0401> uart_open+0x163/0x3a2
> <c01e214f> tty_open+0x175/0x2bc <c0152fb1> chrdev_open+0x160/0x17c
> <c0152e51> chrdev_open+0x0/0x17c <c014b093> __dentry_open+0xe0/0x1cf
> <c014b1e6> nameidata_to_filp+0x19/0x28 <c014b220> do_filp_open+0x2b/0x31
> <c014b30c> do_sys_open+0x3c/0xa9 <c014b3a6> sys_open+0x16/0x18
> <c0102adb> syscall_call+0x7/0xb

This seems to be an invalid situation - you appear to have an _ISA_
NE2000 card using IRQ3, trying to share the same interrupt as a
serial port.

ISA interrupts aren't sharable without additional hardware support
or specific software support in the Linux kernel interrupt
architecture.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core