kern/128870: Interrupt Storm when plugging in PCMCIA Card (HP
a_wehrmann at hotmail.com
Fri Nov 14 07:10:02 PST 2008
>Synopsis: Interrupt Storm when plugging in PCMCIA Card (HP NC8000 Notebook)
>Arrival-Date: Fri Nov 14 15:10:02 UTC 2008
>Originator: Andreas Wehrmann
FreeBSD hostname 7.0-RELEASE-p5 FreeBSD 7.0-RELEASE-p5 #0: Wed Oct 1 10:10:12 UTC 2008 root at i386-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386
All this is happening on a HP NC8000 Laptop.
I tried to configure my PCMCIA WLAN Card (Allnet ALL0282A; AR5211 chip) recently. First thing I wanted to do is to scan for networks, so I set the card "up" and noticed a lot of Interrupt storm warnings on the console:
interrupt storm detected on "irq10:"; throttling interrupt source
The network scan didn't succeed btw.
I tried another WLAN Card: Conceptronic C54RC (Version 2.0) R61 chip but the exact same thing happened again. I then tried a serial card (PCMCIA card that offers a COM-Port) and when booting up, I got those storms as well.
I used the following command to determine, which driver handles IRQ10: "ps ax | grep irq".
The following showed up:
22 ?? WL 0:00.57 [irq10: cbb0 cbb1+*]
Therefore I suppose there is a bug in the interrupt handling in the cbb driver, because all these card work (on the same machine) under Linux and Windows XP.
Plug in some PCMCIA Card.
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