irqpoll causing some breakage?

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Hi,

I recently added the irqpoll patch to Gentoo's 2.6.12 kernels, using this patch:

http://dev.gentoo.org/~dsd/genpatches/trunk/2.6.12/2700_irqpoll.patch

Since then, I've had a few reports of minor breakage, but this is the first one I've been able to get full info on.

Hans-Christian Armingeon (on CC) owns a a combined USB keyboard-mouse, which is broken when the irqpoll patch is applied.

input: USB HID v1.00 Keyboard [Cherry GmbH Cherry Slim Line Trackball Keyboard] on usb-0000:00:10.0-1 input: USB HID v1.00 Mouse [Cherry GmbH Cherry Slim Line Trackball Keyboard] on usb-0000:00:10.0-1

After the irqpoll patch has been applied, the mouse does not work (the keyboard works fine..!). This is without the irqpoll/irqfixup parameters, although adding them does not help either. No errors appear, as far as I can see.

The problem also exists in an unpatched 2.6.13_rc6.

dmesg here: https://bugs.gentoo.org/attachment.cgi?id=65470
full bug: https://bugs.gentoo.org/show_bug.cgi?id=101463

I realise that this is probably not enough information to make any sense out of! Please let me know how we can help further.

Thanks,
Daniel
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