linux-kernel - Re: 2.6.20 "IRQ handler type mismatch for IRQ 4"

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070212131838.04a2abcc@localhost.localdomain>
Date:	Mon, 12 Feb 2007 13:18:38 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	Florian Schmidt <mista.tapas@....net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.20 "IRQ handler type mismatch for IRQ 4"

> [   23.783913] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ 
> sharing enabled
> [   23.787063] pnp: Device 00:0c activated.
> [   23.787420] 00:0c: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

So the PnP layers put a device on IRQ 4, which is sensible

> [   37.516000] eth1: orinoco_cs at 0.0, irq 4, io 0x0100-0x013f

The PCMCIA layer then ignores this and takes IRQ 4 simply because
although PnP has used it the IRQ isnt currently live

> [   53.580000] IRQ handler type mismatch for IRQ 4
> [   53.580000] current handler: pcmcia0.0

The serial IRQ setup fails

> [   53.580000]  [<c0141a25>] setup_irq+0x135/0x1e0
> [   53.580000]  [<c0230930>] serial8250_interrupt+0x0/0xf0
> [   53.580000]  [<c0141b73>] request_irq+0xa3/0xc0
> [   53.580000]  [<c023086e>] serial8250_startup+0x47e/0x4b0
> [   53.580000]  [<c022bf58>] uart_startup+0x48/0x160
> [   53.580000]  [<c022cb9f>] uart_open+0xbf/0x460

This is all scary and generally not needed spew but handy for debug.

Looks like a PCMCIA layer bug. It should be respecting IRQ assignment
(not just allocation) by other resource configuration layers.

Alan
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/