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

Chris Rankin
2006-06-19T19:40:26Z

--- Russell King <rmk+lkml@arm.linux.org.uk> wrote:
> 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.

Hmm, I see what you mean. Except that I thought that I'd manually disabled the motherboard's
serial device on IRQ 3, via the BIOS:

Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
pnp: Device 00:07 activated.
00:07: ttyS2 at I/O 0x3e8 (irq = 4) is a 16550A
pnp: Device 00:08 activated.
00:08: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A

Does Linux reenable all motherboard devices, regardless?

Cheers,
Chris

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